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Aecidium Stock Photos and Images
RM2CDD978–. The rusts of Australia, their structure, nature, and classification . G H. Robinson, Phot. Nat. size & X 250. PHRAGMIDIUM AND MELAMPSORA. ROSACEAE AND LINACEAE. 294 Explanation of Plates. PLATE XXVII. AECIDIUM.Fie-2^-. Voung seedling of Platylobiutn for mo sum, with Aecidium -platylobii on le and leaf stalks ... ... ... ••• ?•• ... nat. size 2-jS. Fruiting branch of the same, with aecidial cups on the pods ... nat. size 239. Section through cups of Aecidium eburneum on pod of Bossiaea hetero- fhylla ... ... ?? ••• •?• •?• ••• > 240. Section of aecidial cup of Fuccinia erechtitis on Erecht
RMMCK5RW–. ^i?' ^.â£'(i/)/to)-/>ja Ci/parisslas. A healthy lowering normal plant compared with the attenuated non-flowering form inhabited by Aecidiuni eunhorbiae. (V. Tubeuf phot.) ccrasi (Fig. 5), which bears only leaves when the rest of the tree, is in blossom. Another perennial symbiosis behaving thus is shown in Euphorhia Cyparksias attacked by Aecidium eiiphorhiae; year after year the diseased shoots produce only leaves, which assist in the reproduction of the fungus (Fig. 6). Similarly with many other Uredineae. Arrest of the seed occurs in ovaries of species of Pnums under the influence of
RMT1HW8B–Diseases of plants induced by Diseases of plants induced by cryptogamic parasites; introduction to the study of pathogenic Fungi, slime-Fungi, bacteria, & Algae diseasesofplant00tube Year: 1897 386 UREDINEAE. The aecidia are developed about the beginning of June, and on Crataegus their peridia in dehiscing split up into very narrow lobes so as to form a bristly tuft over the mouth of .2 * 5 5« tr O <2 c 2 a I. e I « ?5 each aecidium. Ou cultivating infected plants of Crataegus indoors, I found the peridia to develop quite abnormally; they
RM2CDDAPX–. The rusts of Australia, their structure, nature, and classification . R. 5.Brain, Go; SWEET BRIAR, RASPBERRY, AND FLAX RUSTS. 240 Explanation of Plates. Fig. PLATE J. AECIDIUM on DANTHONIA. 39. Leaves with aecidia in dense clusters 40. Cluster of aecidia on leaf ... 41. Section of aecidium showing peridial wall and spores in chains 42. Chain of aecidiospores 43. Single spore detached and more or less rounded 44. Pseudoperidial cells seen from the surface ... nat size x 15 X 50 ... X 1000 ... X 1000 ... X 550 PLATE J. 42 C. C£rMlcbank,Dd 44
RMMCK5BX–. Fig. 184.—Puceinia graminis. A, Portion of transverse section of leaf of Berberis vulgaris, with a young aecidium under the epidermis, v. I. Section through an aecidiuni-bearing spot of a Barberry leaf. At x the normal structure and thickness of the leaf is shown, the portion u to »/ is abnormally thickened ; h to o, upper surface of the leaf ; sp, pycnidia ; a, aecidia in section ; p, their peridium. The aecidiumi marked p alone (without a) shows a peridium exposed in suiface-view only. II. Mature teleutospore-patch breaking through the epidermis, e, from the tissue, Ij. of a leaf of Tritic
RMT3XC7Y–Archive image from page 162 of Die Pilze Böhmens (1908). Die Pilze Böhmens diepilzebhmens00bubuoft Year: 1908 159 Malus, Cydoiiia vulgaris, Sorbus latifolia, Aucuparia, torminalis, Aiuelaiichier cana- densis, vulgaris. Der genetische Zusamnienliang wurde zuerst von Oerstedt festgestellt. ü24. Oymnosporangiuni juniperiiium (Linnt) Fries. — Aecidium cornu- tum Gmeliu. Spermngoaien auf der Oberseite orangefarbiger Flecke, in kleinen Gruppen, kegelförmig hervorragend. Aecidien auf der Unterseite derselben Flecke, auf verdicktem Gewebe gruppenweise, mit langen, walzenförmigen Pseudoperidien, nur
RMRH1J9W–. The British rust fungi (Uredinales), their biology and classification. Uredineae. PUCCINIA POARUM 47 as shown in radial section. The outer edge of each cell is more prolonged downwards so as to overlap a portion of the cell below in an imbricated manner. The aecidium, in both, as is the. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.. Grove, William Bywater. Cambridge, Univ. Press
![. Fig. 208.âPerUbrmiv.ni jiin'i (Coko-yioridm .â <⢠nirionix). Portion of an aecidium with basidia (b) giving off spores and intermediate cells (d); outside the peridiuni (p) other basidia (â ) with club-shaped ends force up the epidermis; II, the thick mycelium in the leaf-iiarenchyma. (After R. Hartig.) 20/tA; in form they are generally longish-oval, few being round; the spore-coat is moderately thick. Aecidiospores are capable of immediate germination, and produce ZJ/vrZo-patches on Scnecio by June. The uredospores have an average length of 28"0/u, and breadth 15"5ja; they are Stock Photo](https://c8.alamy.com/comp/MCK6GG/fig-208perubrmivni-jiini-coko-yioridm-lt-nirionix-portion-of-an-aecidium-with-basidia-b-giving-off-spores-and-intermediate-cells-d-outside-the-peridiuni-p-other-basidia-with-club-shaped-ends-force-up-the-epidermis-ii-the-thick-mycelium-in-the-leaf-iiarenchyma-after-r-hartig-20ta-in-form-they-are-generally-longish-oval-few-being-round-the-spore-coat-is-moderately-thick-aecidiospores-are-capable-of-immediate-germination-and-produce-zjvrzo-patches-on-scnecio-by-june-the-uredospores-have-an-average-length-of-28quot0u-and-breadth-15quot5ja-they-are-MCK6GG.jpg ". Fig. 208.âPerUbrmiv.ni jiin'i (Coko-yioridm .â <⢠nirionix). Portion of an aecidium with basidia (b) giving off spores and intermediate cells (d); outside the peridiuni (p) other basidia (â ) with club-shaped ends force up the epidermis; II, the thick mycelium in the leaf-iiarenchyma. (After R. Hartig.) 20/tA; in form they are generally longish-oval, few being round; the spore-coat is moderately thick. Aecidiospores are capable of immediate germination, and produce ZJ/vrZo-patches on Scnecio by June. The uredospores have an average length of 28"0/u, and breadth 15"5ja; they are Stock Photo")
RMMCK6GG–. Fig. 208.âPerUbrmiv.ni jiin'i (Coko-yioridm .â <⢠nirionix). Portion of an aecidium with basidia (b) giving off spores and intermediate cells (d); outside the peridiuni (p) other basidia (â ) with club-shaped ends force up the epidermis; II, the thick mycelium in the leaf-iiarenchyma. (After R. Hartig.) 20/tA; in form they are generally longish-oval, few being round; the spore-coat is moderately thick. Aecidiospores are capable of immediate germination, and produce ZJ/vrZo-patches on Scnecio by June. The uredospores have an average length of 28"0/u, and breadth 15"5ja; they are
RMT1JFF4–Diseases of plants induced by Diseases of plants induced by cryptogamic parasites; introduction to the study of pathogenic Fungi, slime-Fungi, bacteria, & Algae diseasesofplants00tube Year: 1897 364 UREUINEAK. direction ; their sori form dark spots which break out from beneath the epidermis. The yeHow uredospores have a coat beset with fine spines, and are given off from sori which may or may not be enclosed in a peridium. The sori of the aecidium-stage have no peridium, and are known under the generic name of Caeoma; they frequently occur on other hosts than tliose of the teleutospores. Pyc
RMRDYFXT–. A textbook of botany for colleges and universities ... Botany. 84 MORPHOLOGY teleutospores, the saprophytic promycelium or basidium bearing ba- sidiospores, and the parasitic mycelium bearing aecidiospores), lives upon two unrelated hosts, and produces four (perhaps five) kinds of spores. It is natural that such a polymorphous plant should not have been understood at first, and that the different phases should have received different names. The mycelium bearing uredospores was named Uredo ; that bearing teleutospores, not known at first to be the. Fig. ig6. — Wheal rust: an aecidium (cluster
RMME6KE7–. Die Natürlichen Pflanzenfamilien nebst ihren Gattungen und wichtigeren Arten, insbesondere den Nutzpflanzen, unter Mitwirkung zahlreicher hervorragender Fachgelehrten begründet . Fig. 50. A Vi. B Aecidium leucospermum auf Anemoue nemorosa. C n. D Aecidium punciatum Pers. auf Anemone rannnculoides. {A. ranunculoides, coronaria, acutiloba, caroliniana u. a.), sowie auf Eranlhis liiemalis in Europa und Nordamerika verbreitet ist Aec. punctatum Pevs. Fig. 50 C und Z>. Pseudoperidien auf der Blattunterseite gleichmäßig zerstreut oder längs des Blattrandes stehend, llach, mit 3- bis Slappigem,
![Diseases of plants induced by Diseases of plants induced by cryptogamic parasites; introduction to the study of pathogenic Fungi, slime-Fungi, bacteria, & Algae diseasesofplants00tube Year: 1897 Fio. 205.—CulypiOKpora OoipiKAiano. Aecidia on the under surface of needles of Silver Fir. (v. Tubeuf del.) 'mw Fici. 206.—Aecidium in a needle of Silver Fir (much enUirged). b. Series of aecidiospores and intermediate celLs. c Germinating aecidiospores. (After R. Hartig.) Tliis aecidium is also found on Ahys cvphalonicfi in U])per Bavaria. Barclayella deformans Diet.' This lias been found in the Stock Photo](https://c8.alamy.com/comp/T1HTTK/diseases-of-plants-induced-by-diseases-of-plants-induced-by-cryptogamic-parasites-introduction-to-the-study-of-pathogenic-fungi-slime-fungi-bacteria-algae-diseasesofplants00tube-year-1897-fio-205culypiokpora-ooipikaiano-aecidia-on-the-under-surface-of-needles-of-silver-fir-v-tubeuf-del-mw-fici-206aecidium-in-a-needle-of-silver-fir-much-enuirged-b-series-of-aecidiospores-and-intermediate-cells-c-germinating-aecidiospores-after-r-hartig-tliis-aecidium-is-also-found-on-ahys-cvphalonicfi-in-u-per-bavaria-barclayella-deformans-diet-this-lias-been-found-in-the-T1HTTK.jpg "Diseases of plants induced by Diseases of plants induced by cryptogamic parasites; introduction to the study of pathogenic Fungi, slime-Fungi, bacteria, & Algae diseasesofplants00tube Year: 1897 Fio. 205.—CulypiOKpora OoipiKAiano. Aecidia on the under surface of needles of Silver Fir. (v. Tubeuf del.) 'mw Fici. 206.—Aecidium in a needle of Silver Fir (much enUirged). b. Series of aecidiospores and intermediate celLs. c Germinating aecidiospores. (After R. Hartig.) Tliis aecidium is also found on Ahys cvphalonicfi in U])per Bavaria. Barclayella deformans Diet.' This lias been found in the Stock Photo")
RMT1HTTK–Diseases of plants induced by Diseases of plants induced by cryptogamic parasites; introduction to the study of pathogenic Fungi, slime-Fungi, bacteria, & Algae diseasesofplants00tube Year: 1897 Fio. 205.—CulypiOKpora OoipiKAiano. Aecidia on the under surface of needles of Silver Fir. (v. Tubeuf del.) 'mw Fici. 206.—Aecidium in a needle of Silver Fir (much enUirged). b. Series of aecidiospores and intermediate celLs. c Germinating aecidiospores. (After R. Hartig.) Tliis aecidium is also found on Ahys cvphalonicfi in U])per Bavaria. Barclayella deformans Diet.' This lias been found in the
![. Fungi, ascomycetes, ustilaginales, uredinales. Fungi. 204 PROTOBASIDIOMYCETES [CH. But the fact that these sori are developed on the same mycelium as the spermogonia, the fact that in their "fertile cells nuclear association takes place and the fact that in the formation of the fertile cell a sterile cell is cut off, all suggest that the true homology is with the aecidium. The mycelium formed by the germination of the aecidiospore grows with renewed energy. It consists of binucleate cells giving rise to uredospores. These are borne in groups or uredosori (fig. 179) which may be surround Stock Photo](https://c8.alamy.com/comp/RDX0K4/fungi-ascomycetes-ustilaginales-uredinales-fungi-204-protobasidiomycetes-ch-but-the-fact-that-these-sori-are-developed-on-the-same-mycelium-as-the-spermogonia-the-fact-that-in-their-quotfertile-cells-nuclear-association-takes-place-and-the-fact-that-in-the-formation-of-the-fertile-cell-a-sterile-cell-is-cut-off-all-suggest-that-the-true-homology-is-with-the-aecidium-the-mycelium-formed-by-the-germination-of-the-aecidiospore-grows-with-renewed-energy-it-consists-of-binucleate-cells-giving-rise-to-uredospores-these-are-borne-in-groups-or-uredosori-fig-179-which-may-be-surround-RDX0K4.jpg ". Fungi, ascomycetes, ustilaginales, uredinales. Fungi. 204 PROTOBASIDIOMYCETES [CH. But the fact that these sori are developed on the same mycelium as the spermogonia, the fact that in their "fertile cells nuclear association takes place and the fact that in the formation of the fertile cell a sterile cell is cut off, all suggest that the true homology is with the aecidium. The mycelium formed by the germination of the aecidiospore grows with renewed energy. It consists of binucleate cells giving rise to uredospores. These are borne in groups or uredosori (fig. 179) which may be surround Stock Photo")
RMRDX0K4–. Fungi, ascomycetes, ustilaginales, uredinales. Fungi. 204 PROTOBASIDIOMYCETES [CH. But the fact that these sori are developed on the same mycelium as the spermogonia, the fact that in their "fertile cells nuclear association takes place and the fact that in the formation of the fertile cell a sterile cell is cut off, all suggest that the true homology is with the aecidium. The mycelium formed by the germination of the aecidiospore grows with renewed energy. It consists of binucleate cells giving rise to uredospores. These are borne in groups or uredosori (fig. 179) which may be surround
RMMCK623–. -I 2 3 Fig. ^ii.—Aecidium HivhUinum. 1, Cone-scale of Spruce with aecidia, tliose to left dehiscing their yellow spores, those to right still closed, (v. Tubeuf del.) 2, Section through an immature aecidium. 3, Part of 2 enlarged—y)ir, peridium ; .«/), spores; zto, intermediate cells; sptr, sporophorcs ; m, mycelium; im,; the scale-parenchyma. (After Reess.) The aecidia break out on the inner (rarely the outer) side of the bases of the cone-scales; each is enclosed in a firm brown lignified peridium, which ruptures by a cross-fissure and becomes an open disc. The young spores are joined by
![Diseases of cultivated plants and Diseases of cultivated plants and trees diseasesofcultiv00massuoft Year: [1910?] 3l6 DISEASES OF CULTIVATED PLANTS country); i-septate, rarely 2-septate, each cell having two or four germ-pores. Spermogoniaand aecidia on a different host to teleutospores. Uredospores unknown. F'lG. 95.—Gymttoiporangium clavariacforme. I, teleutospore stage on juniper branch; 2, teleutospores; 3, teleutospores ger- minating and producing secondary spores, (7, a ; 4, aecidium stage on pear leaf ; 5, aecidium stage on branch, leaves, and fruit of hawthorn ; 6, aecidiospore g Stock Photo](https://c8.alamy.com/comp/T1HPW9/diseases-of-cultivated-plants-and-diseases-of-cultivated-plants-and-trees-diseasesofcultiv00massuoft-year-1910-3l6-diseases-of-cultivated-plants-country-i-septate-rarely-2-septate-each-cell-having-two-or-four-germ-pores-spermogoniaand-aecidia-on-a-different-host-to-teleutospores-uredospores-unknown-flg-95gymttoiporangium-clavariacforme-i-teleutospore-stage-on-juniper-branch-2-teleutospores-3-teleutospores-ger-minating-and-producing-secondary-spores-7-a-4-aecidium-stage-on-pear-leaf-5-aecidium-stage-on-branch-leaves-and-fruit-of-hawthorn-6-aecidiospore-g-T1HPW9.jpg "Diseases of cultivated plants and Diseases of cultivated plants and trees diseasesofcultiv00massuoft Year: [1910?] 3l6 DISEASES OF CULTIVATED PLANTS country); i-septate, rarely 2-septate, each cell having two or four germ-pores. Spermogoniaand aecidia on a different host to teleutospores. Uredospores unknown. F'lG. 95.—Gymttoiporangium clavariacforme. I, teleutospore stage on juniper branch; 2, teleutospores; 3, teleutospores ger- minating and producing secondary spores, (7, a ; 4, aecidium stage on pear leaf ; 5, aecidium stage on branch, leaves, and fruit of hawthorn ; 6, aecidiospore g Stock Photo")
RMT1HPW9–Diseases of cultivated plants and Diseases of cultivated plants and trees diseasesofcultiv00massuoft Year: [1910?] 3l6 DISEASES OF CULTIVATED PLANTS country); i-septate, rarely 2-septate, each cell having two or four germ-pores. Spermogoniaand aecidia on a different host to teleutospores. Uredospores unknown. F'lG. 95.—Gymttoiporangium clavariacforme. I, teleutospore stage on juniper branch; 2, teleutospores; 3, teleutospores ger- minating and producing secondary spores, (7, a ; 4, aecidium stage on pear leaf ; 5, aecidium stage on branch, leaves, and fruit of hawthorn ; 6, aecidiospore g
RMRHAWP6–. Botanische Jahrbu?cher fu?r Systematik, Pflanzengeschichte und Pflanzengeographie. Botany; Plantengeografie; Paleobotanie; Taxonomie; Pflanzen. Aecidium Englerianwri P. Henn.etLindau, ' eri J .J V. Wilk.Engelmann.Leip zig. iindaii del. ' Lith.AnstJuliusKlinkliarclt,Leipzig.. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.. Engler, Adolf, 1844-1930. Stuttgart : Schweizerbart
RMMCK57X–. j}ar •?, Fig. 244.—Aicidium Mrohiliiiura. 1, Cone-scale of Spruce with aecidia, those to left dehiscing their j-ellow spores, those to right still closed, (v. Tubeiif del.) •1, Section through an immature aecidium. 3, Part of 2 enlarged—pti-, peridium ; xp, spores; tw, intermediate cells; xplr, sporophores ; m, nij'celium ; jiai-, the scale-parenchyma. (After Reess.) The aecidia break out on the inner (rarely the outer) side of the bases of the cone-scales; each is enclosed in a firm brown lignified peridium, which ruptures by a cross-fissure and becomes an open disc. The young spores are jo
RMT3Y0BT–Archive image from page 214 of Die Pilze Böhmens (1908). Die Pilze Böhmens diepilzebhmens00bubuoft Year: 1908 211 8. Melampsorella Schroeter. Teleutosporen in deu Epidermiszelleu, mit düuner, hyaliner Membran, ein- zellig oder selten geteilt; Uredosporen mit Pseudoperidie oder nur mit Parafysen. Aecidien mit typischer Pseudoperidie. 29Ö. Ulelauipgorella Caryophyllaceanim (De CaudoUe). Schroeter. — Melampsorella Gera- st i i (Persoon) Schroeter. — Melampsora Ge- ra s t i i Winter. Spermogonien auf der Oberseite der Na- deln, honiggelb. Aecidien (Aecidium elatinum Albertini et Schweiuitz) auf
RMRPXN6R–. Text-book of botany, morphological and physiological. Botany. CARPOSPORE&. 333 gonium is covered with short mycelial branches, from the ends of which are detached numerous very small spore-like bodies, the Spermatid. It has already been stated that their significance in the development' of the Fungus is unknown. The secidium-fruits lie at first beneath the epidermis of the leaf, where they form a tuberous parenchymatous body-(^), also surrounded by an envelope of fine mycelial filaments. When mature the aecidium breaks through the epidermis of the leaf and forms an open cup, the wall of
RMMCKC9M–. Fig. 97. — Peridcrmiuin Ha?-ki!essi. i, young stem of Pin us ponderosus, three years old, showing the Peridermium, two- thirds nat. size ; 2, appearance of a stem, eight years old, attaclced by the fungus, the swollen portion being studded with aecidia, two-thirds nat. size ; 3, section through Fig. 2, showing the thickening of the annual rings of wood caused by the presence of the fungus. closed and triquetrous, at length opening at the apex, orange- rosy ; spores subglobose or broadly elliptical, orange, verruculose, 15-18 X 10-12 /x. Peridermium conorum, Thiim. { — Aecidium conorum-piceae
RMT3XRA5–Archive image from page 150 of Die Pilze Böhmens (1908). Die Pilze Böhmens diepilzebhmens00bubuoft Year: 1908 147 fi) Sporen icarsig. l'J9. Puccinia fusca (Persoon) Winter. Aecidium fiiscinii Persoon. Spermogonien blattoberseits oder beiderseits zerstreut, gross, schwarz- braun, später schwarz. Teleutosporenlager blattunterseits mehr oder weniger dicht verteilt, rundlich, bald nackt, staubig, oft zusaiumenfliessend, braun; Sporen aus 2 kugligen oder ellipsoidischen Zellen bestehend, beiderseits abgerundet, bei der Querwand stark eingeschnürt, 31 —mO ft lang, 15—24 ;t breit; Membran hellkasta
![. Fungi, ascomycetes, ustilaginales, uredinales. Fungi. VIII] UREDINALES 215 vegetative nucleus has replaced that of the no longer functional male element. As already shown there is a strong presumption that this male element was the spermatium and the fertile cell may then be regarded as an oogonium and the young aecidium as a group or sorus of female reproductive organs. In this connection Blackman has suggested a possible origin of the sterile cell; in Phragmidium violaceum he found it to be occasionally elongated and pushed up between the cells of the epidermis so that it was covered only Stock Photo](https://c8.alamy.com/comp/RDX0ER/fungi-ascomycetes-ustilaginales-uredinales-fungi-viii-uredinales-215-vegetative-nucleus-has-replaced-that-of-the-no-longer-functional-male-element-as-already-shown-there-is-a-strong-presumption-that-this-male-element-was-the-spermatium-and-the-fertile-cell-may-then-be-regarded-as-an-oogonium-and-the-young-aecidium-as-a-group-or-sorus-of-female-reproductive-organs-in-this-connection-blackman-has-suggested-a-possible-origin-of-the-sterile-cell-in-phragmidium-violaceum-he-found-it-to-be-occasionally-elongated-and-pushed-up-between-the-cells-of-the-epidermis-so-that-it-was-covered-only-RDX0ER.jpg ". Fungi, ascomycetes, ustilaginales, uredinales. Fungi. VIII] UREDINALES 215 vegetative nucleus has replaced that of the no longer functional male element. As already shown there is a strong presumption that this male element was the spermatium and the fertile cell may then be regarded as an oogonium and the young aecidium as a group or sorus of female reproductive organs. In this connection Blackman has suggested a possible origin of the sterile cell; in Phragmidium violaceum he found it to be occasionally elongated and pushed up between the cells of the epidermis so that it was covered only Stock Photo")
RMRDX0ER–. Fungi, ascomycetes, ustilaginales, uredinales. Fungi. VIII] UREDINALES 215 vegetative nucleus has replaced that of the no longer functional male element. As already shown there is a strong presumption that this male element was the spermatium and the fertile cell may then be regarded as an oogonium and the young aecidium as a group or sorus of female reproductive organs. In this connection Blackman has suggested a possible origin of the sterile cell; in Phragmidium violaceum he found it to be occasionally elongated and pushed up between the cells of the epidermis so that it was covered only
RMME6KHW–. Die Natürlichen Pflanzenfamilien nebst ihren Gattungen und wichtigeren Arten, insbesondere den Nutzpflanzen, unter Mitwirkung zahlreicher hervorragender Fachgelehrten begründet . t 2,00 Fig. 39. Pnccinia giaminis Pers. A Teleutosporentragender Halm von Seeale cercule. B ein Teil desselben ver- größert. C Aecidien und Spermogonien im Blattquerschnitt von Berberis xul'jaris. Der den Pilz tragende Teil des Blattes ist monströs verdickt. I) Teil eines solchen Querschnittes mit eiuem jungen, noch nicht geöffneten Aecidium. E Uredo- und Teleutosporeu. F ein Teleutosporenlager schwacher vergrößert.
RMRDED12–. Diseases of plants induced by cryptogamic parasites : introduction to the study of pathogenic Fungi, slime-Fungi, bacteria, & Algae . Plant diseases; Parasitic plants; Fungi. AECIDIUM-FORMS. 405 prey to wood-destroying fungi. ^ The presence of such rotting spots renders the tree liable to break over in their neighbour- hood, while they, as well as the swellings on the trunks, cause a considerable depreciation in the value of the timber. The malformations of the branch-system known as witches' brooms are frequently induced by this fungus. They occur as a rule on the horizontal branches an
RMMCK6JA–. Fig. 184.—Puecinia gramiiils. A, Portion of transverse section of leaf of Berherii vulgaris, with a young aecidium under the epidermis, v.. I. Section through an aecidium-bearing spot of a Barberry leaf. At x the normal structure a:id thickness of the leaf is sliown, the portion u to .v is abnormally thickened ; h to o, upper surface of the leaf ; »p, pycnidia ; a, aecidia in section ; />, their peridium. The aecidium marked p alone (without a) shows a peridium exposed in suiface-view only. II. Mature teleutospore-jjatch breaking through the epidermis, e, from the tissue, It. of a leaf of
RMRDJ5YD–. Fungous diseases of plants : with chapters on physiology, culture methods and technique . Fungi in agriculture. PROTOBASIDIOMYCETES 397 advances. These spores are 20-35 * T5â22/*> an<i a spore ger- minates by the production of the characteristic promycelium, di- vided ordinarily into four cells, each producing its sporidium. The germination of the teleutospore would seem to take place ordinarily several weeks prior to the appearance of the spermogonium and aecidium, both of which arise only from teleutosporic infection. Sydow accepts the separation of the rust of clovers into two spe-
RMMCR90W–. Abb. 21. Teleutosporen von Puccinia longitsivia. 121. Puccinia lougissima Schroeter. — Eudophyllum Sedi (De CaudoUe) Lovelle. — Aecidium Sedi Schroeter. Spermogonien gross, schwarzbraun, kegelförmig, zwischen den Aeci- dien zerstreut. Aecidien auf den Blättern des befallenen Triebes entwickelt, mit tief eingesenkten, halbkugelig gewölbten und mit rundlichem Loch geöffneten, randlosen Pseudoperidien; Sporen kuglig bis länglich, gewöhnlich polyedrisch, 22—33 ft lang 20—31 n breit, mit farbloser, fein- und dichtwarziger Membran und orange- rotem Inhalt. Uredolager parallel mit den Nerven blatto
RMRH2WRR–. The British rust fungi (Uredinales) their biology and classification. Rust fungi -- Great Britain. his IMCCINIA the fusiform shape, thin walls, and pale colour of the teleutospores, which often become totally devoid of thickening al tin- apex, by the dropping off of the pale thickening cap, ou germination. /'. punctata is additionally distinguished by the presence of the aecidium. Fischer explains the fact, that distortions more usually accompany /'. Valantiae, by the consideration that infection takes place from the basidiospores mainly through the cuticle of young ami still growing parts,
![. Fio. ISa.—/"i/.ccmja co/ricis on Stinging Xettle. The aecidial cushions have caused sweUing and distortion of stems and leaf-stalks, also swollen outgrowths on the leaves, (v. Tubeuf phot.) Klebahn and Magnus believe that there is a Fuccinia on Carex acuta and G. Goodenoughii related to an Accidium on Rihes Grossidaria, B. rubrum, and B. aure^cm ; also a Fi/ccmia on Garex riparia with an Aecidium on Hibcs nigrum. ( )n this account Klebahn ^ distinguishes Puce, caricis i., ii., and in., agreeing respectively with P. Pringsheimiana Kleb., P. caricis (Sclmiu.), and P. Magiiusii Kleb. P. Sc Stock Photo](https://c8.alamy.com/comp/MCK64T/fio-isaquoticcmja-coricis-on-stinging-xettle-the-aecidial-cushions-have-caused-sweuing-and-distortion-of-stems-and-leaf-stalks-also-swollen-outgrowths-on-the-leaves-v-tubeuf-phot-klebahn-and-magnus-believe-that-there-is-a-fuccinia-on-carex-acuta-and-g-goodenoughii-related-to-an-accidium-on-rihes-grossidaria-b-rubrum-and-b-aurecm-also-a-ficcmia-on-garex-riparia-with-an-aecidium-on-hibcs-nigrum-n-this-account-klebahn-distinguishes-puce-caricis-i-ii-and-in-agreeing-respectively-with-p-pringsheimiana-kleb-p-caricis-sclmiu-and-p-magiiusii-kleb-p-sc-MCK64T.jpg ". Fio. ISa.—/"i/.ccmja co/ricis on Stinging Xettle. The aecidial cushions have caused sweUing and distortion of stems and leaf-stalks, also swollen outgrowths on the leaves, (v. Tubeuf phot.) Klebahn and Magnus believe that there is a Fuccinia on Carex acuta and G. Goodenoughii related to an Accidium on Rihes Grossidaria, B. rubrum, and B. aure^cm ; also a Fi/ccmia on Garex riparia with an Aecidium on Hibcs nigrum. ( )n this account Klebahn ^ distinguishes Puce, caricis i., ii., and in., agreeing respectively with P. Pringsheimiana Kleb., P. caricis (Sclmiu.), and P. Magiiusii Kleb. P. Sc Stock Photo")
RMMCK64T–. Fio. ISa.—/"i/.ccmja co/ricis on Stinging Xettle. The aecidial cushions have caused sweUing and distortion of stems and leaf-stalks, also swollen outgrowths on the leaves, (v. Tubeuf phot.) Klebahn and Magnus believe that there is a Fuccinia on Carex acuta and G. Goodenoughii related to an Accidium on Rihes Grossidaria, B. rubrum, and B. aure^cm ; also a Fi/ccmia on Garex riparia with an Aecidium on Hibcs nigrum. ( )n this account Klebahn ^ distinguishes Puce, caricis i., ii., and in., agreeing respectively with P. Pringsheimiana Kleb., P. caricis (Sclmiu.), and P. Magiiusii Kleb. P. Sc
RMRDX0P1–. Fungi, ascomycetes, ustilaginales, uredinales. Fungi. Fig. 170. Uromyces Poae'R&h&n.; aecidium just before the epidermis is broljen through, x 310; after Black- man and Fraser. Pliragmitis. A corresponding discoloration takes place around the young aecidia, and there is thus some suggestion that the spermatia, when functional, were carried to their destination by insects. The aecidia occur in groups, usually on the abaxial side of the leaf; in them the aecidiospores are produced in basipetal rows (fig. 170) alternating with small, abortive, intercalary cells, by the disintegration of
![. j^a/" 3 Fio. 244.—Aie'alimii strobiliiiuia. 1, Cone-scalu of Spruce wiUi aecidia, those to left dehiscing their yellow spores, those to right still closed, (v. Tubevif del.) 2, Section through an immature aecidium. 3, Part of 2 enlarged—pi r, peridium ; sji, spores; ;?o, intermediate cells; uptr, sporophores ; m, mycelium; jurr, the scale-parenchyma. (After Reess.) The aecidia break out on the inner (rarely the outer) side of the bases of the cone-scales; each is enclosed in a firm brown lignified peridium, which ruptures by a cross-fissure and becomes an open disc. The young spores are Stock Photo](https://c8.alamy.com/comp/MCK6CY/jaquot-3-fio-244aiealimii-strobiliiiuia-1-cone-scalu-of-spruce-wiui-aecidia-those-to-left-dehiscing-their-yellow-spores-those-to-right-still-closed-v-tubevif-del-2-section-through-an-immature-aecidium-3-part-of-2-enlargedpi-r-peridium-sji-spores-o-intermediate-cells-uptr-sporophores-m-mycelium-jurr-the-scale-parenchyma-after-reess-the-aecidia-break-out-on-the-inner-rarely-the-outer-side-of-the-bases-of-the-cone-scales-each-is-enclosed-in-a-firm-brown-lignified-peridium-which-ruptures-by-a-cross-fissure-and-becomes-an-open-disc-the-young-spores-are-MCK6CY.jpg ". j^a/" 3 Fio. 244.—Aie'alimii strobiliiiuia. 1, Cone-scalu of Spruce wiUi aecidia, those to left dehiscing their yellow spores, those to right still closed, (v. Tubevif del.) 2, Section through an immature aecidium. 3, Part of 2 enlarged—pi r, peridium ; sji, spores; ;?o, intermediate cells; uptr, sporophores ; m, mycelium; jurr, the scale-parenchyma. (After Reess.) The aecidia break out on the inner (rarely the outer) side of the bases of the cone-scales; each is enclosed in a firm brown lignified peridium, which ruptures by a cross-fissure and becomes an open disc. The young spores are Stock Photo")
RMMCK6CY–. j^a/" 3 Fio. 244.—Aie'alimii strobiliiiuia. 1, Cone-scalu of Spruce wiUi aecidia, those to left dehiscing their yellow spores, those to right still closed, (v. Tubevif del.) 2, Section through an immature aecidium. 3, Part of 2 enlarged—pi r, peridium ; sji, spores; ;?o, intermediate cells; uptr, sporophores ; m, mycelium; jurr, the scale-parenchyma. (After Reess.) The aecidia break out on the inner (rarely the outer) side of the bases of the cone-scales; each is enclosed in a firm brown lignified peridium, which ruptures by a cross-fissure and becomes an open disc. The young spores are
RMRM6Y11–. Annual report of the Agricultural Experiment Station. Cornell University. Agricultural Experiment Station; Agriculture -- New York (State). — 133 — scend the petioles to reappear in other leaves previously unaffected and there develop its spores ; also, that the spore forms which appear in the spring do not arise from mycelium which has lived over winter in the roots of the host. REPRODUCTIVE ORGANS. /. The Aecidium.—This form is not so abundant as the other two and does less injury. It is found upon the White Clover, of which it attacks the leaves and petioles, causing the latter to be- com
RMMCKCBX–. Fig. 85. — Uromyces coh/iui. i, portion of a diseased Colchicum leaf; 2, teleutospores, one of vvhicli has germinated and produced a promycelium bearing three secondary spores. Fig. i reduced, Fig. 2 mag. dark brown, apex much thickened, with a small, hyaline, wart- like papilla, 26-35 X 20-26 /x. If the disease appears early, spray with Bordeaux mixture ; when the pods are formed, use permanganate of potash. Broad bean rust {Uromyces fabae, De Bary) is a parasite very common on the leaves and stems of broad beans, peas, also on various wild leguminous plants, vetches, etc. The aecidium stag
RMRDYFY3–. A textbook of botany for colleges and universities ... Botany. THALLOPHYTES 83 results in a filament of four cells, each of which gives rise to a slender branch bearing a spore (fig. 194). This saprophytic filament has been called the promycelium, and its spores sporidia; but it represents a four-celled basidium bearing basidiospores, and is the structure that determines the position of rusts among Basidiomycetes. Aecidium.—The basidiospores that fall upon young barberry leaves germinate, and an extensive mycelium is developed among the tissues of the new host. This mycelium develops very ev
RMMCK6EW–. Fio. 224.—Aecidia and Pycnidia of various species of Gt/mnoxporangium: G. tremelloides—1 and 3, aecidia on leaf of Pyrun Aria; 0 and fi, aecidia on leaf of Pyrv.s Mains; 10 and 20, portions of the peridium of an aecidium from Ci, showing the peculiar articulation of the colls. G. junlpitinuui—3 and U, aecidia on Pyrun Aucuparia; 7 and S- aecidia on Amelancfiier vulgaris. G. clavariafforme—9 and 10, aecidia on Pyius latifoUa; 11, 1'2, and IG, aecidia on Crataegus Oxyacantha, grown out-of-doors; lU, the same aecidia, enlarged; ti, I'j, and 17, aecidia on Crataegus Oxyacantha, indoor culture; 1
RMRDCY9F–. Diseases of plants induced by cryptogamic parasites : introduction to the study of pathogenic Fungi, slime-Fungi, bacteria, & Algae . Plant diseases; Parasitic plants; Fungi. AECIDIUM-FORMS. 407. iu the growth of the wood disturbs the elements, so that they are irregularly developed and more or less twisted.^ A mycelium inhabits the tissues of abnormal twigs and cankered swellings. It grows in the . intercellular spaces of the rind, between the bast cells and outer parts of the wood, and derives nutriment by means of haustoria; these either bore through the cell-walls, or only press clos
RMMCRBC7–. A l^ndoplijUum sempervivi: 1 .^abitusi; 2 2;eleutofpore mit iöaftbie. B Chrysomyxa rhododendri: 1 iiijibienform (Aecidium abietiuuiii) auf %id)ten^ nabeln; 2 Xcleutofpoi-enforiu auf einem SKpenrofenblatt; 3 leleutofpore mit Süafibien. C C'ronartium ribicolum: Xe^ leutofporenform auf einem liibos^äitatt. D Croiiartium asclepiadeum: StbO. 30: 3lDftpi[ä 1 äjibienfoi'md'orideriuium piiii) auf einem i'liefernsiueiß; 2 Seteutofporen mit Siafibieit. E Mülampsora treinulae: 1 Selcutofporenforin auf einem gittevpappelbratt; 2 »ui-d;- fc(;nitt burd; ein 2;eleuto= fporentager. F Caeoma doforraaiis: ßin
![. The British rust fungi (Uredinales), their biology and classification. Uredineae. Fig. 241. C. Senecionis. a, chain of uredospores; h, two fascicles of leaves of P. silvestris, bearing peridia on one leaf only of each fascicle (reduced). Fi£ '24:2. C. Senecionis. Teleuto- spore germinating. This is the species of Coleosporium whose life-historj has been longest known; "Wolff first experimentally demonstrated it in 1872, and he was followed by Plowright in 1882, as well as by Cprnu, Hartig, Rathay, Von Thiimen, Rostrup, Klebahn and Fischer. The aecidium had previously been called Perider Stock Photo](https://c8.alamy.com/comp/RH2RWY/the-british-rust-fungi-uredinales-their-biology-and-classification-uredineae-fig-241-c-senecionis-a-chain-of-uredospores-h-two-fascicles-of-leaves-of-p-silvestris-bearing-peridia-on-one-leaf-only-of-each-fascicle-reduced-fi-242-c-senecionis-teleuto-spore-germinating-this-is-the-species-of-coleosporium-whose-life-historj-has-been-longest-known-quotwolff-first-experimentally-demonstrated-it-in-1872-and-he-was-followed-by-plowright-in-1882-as-well-as-by-cprnu-hartig-rathay-von-thiimen-rostrup-klebahn-and-fischer-the-aecidium-had-previously-been-called-perider-RH2RWY.jpg ". The British rust fungi (Uredinales), their biology and classification. Uredineae. Fig. 241. C. Senecionis. a, chain of uredospores; h, two fascicles of leaves of P. silvestris, bearing peridia on one leaf only of each fascicle (reduced). Fi£ '24:2. C. Senecionis. Teleuto- spore germinating. This is the species of Coleosporium whose life-historj has been longest known; "Wolff first experimentally demonstrated it in 1872, and he was followed by Plowright in 1882, as well as by Cprnu, Hartig, Rathay, Von Thiimen, Rostrup, Klebahn and Fischer. The aecidium had previously been called Perider Stock Photo")
RMRH2RWY–. The British rust fungi (Uredinales), their biology and classification. Uredineae. Fig. 241. C. Senecionis. a, chain of uredospores; h, two fascicles of leaves of P. silvestris, bearing peridia on one leaf only of each fascicle (reduced). Fi£ '24:2. C. Senecionis. Teleuto- spore germinating. This is the species of Coleosporium whose life-historj has been longest known; "Wolff first experimentally demonstrated it in 1872, and he was followed by Plowright in 1882, as well as by Cprnu, Hartig, Rathay, Von Thiimen, Rostrup, Klebahn and Fischer. The aecidium had previously been called Perider
RMMCK59E–. FiG. 224.-—Aei-idia and Pi/cnidia of various species of Gymnonporangiurii: G. iremelloides—1 and ;?, aecidia on leaf of Pyrus Aria ; 5 and 6, aecidia on leaf of Pyrv.s MaAus; 19 and 20, portions of the peridium of an aecidium from 5, showing the peculiar articulation of the cells. 6. juniperinuM—3 and U, aecidia on Pyrus Aucuparia ; 7 and S, aecidia on Amelanchier vulgaris. G. clavariaeforme—9 and 10, aecidia on Pyius latifolia; 11, 12, and IG, aecidia on CraUttgv.if Oxyacautka, grown out-of-doors; lU, the same aecidia, enlarged ; 1-1, I'l, and 17, aecidia on Crataegus Oxyacanthn, indoor cul
RMRDX0P7–. Fungi, ascomycetes, ustilaginales, uredinales. Fungi. 200 PROTOBASIDIOMYCETES [CH.. Fig. 170. Uromyces Poae'R&h&n.; aecidium just before the epidermis is broljen through, x 310; after Black- man and Fraser. Pliragmitis. A corresponding discoloration takes place around the young aecidia, and there is thus some suggestion that the spermatia, when functional, were carried to their destination by insects. The aecidia occur in groups, usually on the abaxial side of the leaf; in them the aecidiospores are produced in basipetal rows (fig. 170) alternating with small, abortive, intercalary c
![. Die Natürlichen Pflanzenfamilien nebst ihren Gattungen und wichtigeren Arten, insbesondere den Nutzpflanzen, unter Mitwirkung zahlreicher hervorragender Fachgelehrten begründet . Elf;. 25. Gionartium asclepiadeum (Willd.). A ein Kiefernzweig mit zahlreichen Aecidien in nat. Größe. B ein einzelnes Aecidium 4fach vergr. (Original.) Andere Sporen- Ecuador: A. Cordiae Lagerh. (Fig. 27 A] und A. andina Lagerh. Cordiae bestehen aus 30—60 prismatischen, fest verbundenen Sporenzellen, messen 120—ISO ij. im Durchmesser und sind 40—50 tj. hoch. Noch ehe eine neue Sporenschicht heranwächst, hat sich di Stock Photo](https://c8.alamy.com/comp/ME6KNN/die-natrlichen-pflanzenfamilien-nebst-ihren-gattungen-und-wichtigeren-arten-insbesondere-den-nutzpflanzen-unter-mitwirkung-zahlreicher-hervorragender-fachgelehrten-begrndet-elf-25-gionartium-asclepiadeum-willd-a-ein-kiefernzweig-mit-zahlreichen-aecidien-in-nat-gre-b-ein-einzelnes-aecidium-4fach-vergr-original-andere-sporen-ecuador-a-cordiae-lagerh-fig-27-a-und-a-andina-lagerh-cordiae-bestehen-aus-3060-prismatischen-fest-verbundenen-sporenzellen-messen-120iso-ij-im-durchmesser-und-sind-4050-tj-hoch-noch-ehe-eine-neue-sporenschicht-heranwchst-hat-sich-di-ME6KNN.jpg ". Die Natürlichen Pflanzenfamilien nebst ihren Gattungen und wichtigeren Arten, insbesondere den Nutzpflanzen, unter Mitwirkung zahlreicher hervorragender Fachgelehrten begründet . Elf;. 25. Gionartium asclepiadeum (Willd.). A ein Kiefernzweig mit zahlreichen Aecidien in nat. Größe. B ein einzelnes Aecidium 4fach vergr. (Original.) Andere Sporen- Ecuador: A. Cordiae Lagerh. (Fig. 27 A] und A. andina Lagerh. Cordiae bestehen aus 30—60 prismatischen, fest verbundenen Sporenzellen, messen 120—ISO ij. im Durchmesser und sind 40—50 tj. hoch. Noch ehe eine neue Sporenschicht heranwächst, hat sich di Stock Photo")
RMME6KNN–. Die Natürlichen Pflanzenfamilien nebst ihren Gattungen und wichtigeren Arten, insbesondere den Nutzpflanzen, unter Mitwirkung zahlreicher hervorragender Fachgelehrten begründet . Elf;. 25. Gionartium asclepiadeum (Willd.). A ein Kiefernzweig mit zahlreichen Aecidien in nat. Größe. B ein einzelnes Aecidium 4fach vergr. (Original.) Andere Sporen- Ecuador: A. Cordiae Lagerh. (Fig. 27 A] und A. andina Lagerh. Cordiae bestehen aus 30—60 prismatischen, fest verbundenen Sporenzellen, messen 120—ISO ij. im Durchmesser und sind 40—50 tj. hoch. Noch ehe eine neue Sporenschicht heranwächst, hat sich di
RMRDD7T8–. Diseases of plants induced by cryptogamic parasites : introduction to the study of pathogenic Fungi, slime-Fungi, bacteria, & Algae . Plant diseases; Parasitic plants; Fungi. PUCCINIA. 343 hyphae forming the bottom of the aecidium-cup. These hyphae give rise to numerous short sporophores, from each of which a single long chain of spores is abjointed in basipetal succession, the spores being at first separated by temporary intermediate cells. The sporophores round the margin of each aecidium do not, however, give off spores; they also produce chains of cells basipetally, but these grow la
RMMCK630–. Fio. 224.—Accklia and Piiniidia of various species of GyninoKporanyhim : G. tremelloides—1 and i', aecidia on leaf of Pi/rus Aria ; 5 and 6, aecidia on leaf of Pyras Malus; 10 and 20, portions of the peridiuin of an aecidium from ii, showing the peculiar articulation of the cells. G. juniperiiium—3 and U, aecidia on Pyrus Aucuparia; 7 and S. aecidia on Amelanchier vulgaris. 0. clavariaeforme—9 a.nd 10, aecidia on Pyius latifolia; 11, 12, and Hi, aecidia on Crataegus Oxyacanlha, grown out-of-doors; 7/,, the same aecidia, enlarged ; l.i, I'l, and 17, aecidia on Crataegus Oxyacanlha, indoor cul
![. Fungi, ascomycetes, ustilaginales, uredinales. Fungi. Fig. 177- PucciniaFalcariae; branched fertile cell of aecidium or primary uredosorus, x 1200; after Dittschlag. Fig. 178. Phragmidiicm Potentillae-Canadensis Diet.; a. conjugation; b. branched fertile cell; after Christman.. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.. Gwynne-Vaughan, Helen Charlotte Isabella (Fraser) Dame, 1879-. Cambridge [Eng] University Press Stock Photo](https://c8.alamy.com/comp/RDX0KC/fungi-ascomycetes-ustilaginales-uredinales-fungi-fig-177-pucciniafalcariae-branched-fertile-cell-of-aecidium-or-primary-uredosorus-x-1200-after-dittschlag-fig-178-phragmidiicm-potentillae-canadensis-diet-a-conjugation-b-branched-fertile-cell-after-christman-please-note-that-these-images-are-extracted-from-scanned-page-images-that-may-have-been-digitally-enhanced-for-readability-coloration-and-appearance-of-these-illustrations-may-not-perfectly-resemble-the-original-work-gwynne-vaughan-helen-charlotte-isabella-fraser-dame-1879-cambridge-eng-university-press-RDX0KC.jpg ". Fungi, ascomycetes, ustilaginales, uredinales. Fungi. Fig. 177- PucciniaFalcariae; branched fertile cell of aecidium or primary uredosorus, x 1200; after Dittschlag. Fig. 178. Phragmidiicm Potentillae-Canadensis Diet.; a. conjugation; b. branched fertile cell; after Christman.. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.. Gwynne-Vaughan, Helen Charlotte Isabella (Fraser) Dame, 1879-. Cambridge [Eng] University Press Stock Photo")
RMRDX0KC–. Fungi, ascomycetes, ustilaginales, uredinales. Fungi. Fig. 177- PucciniaFalcariae; branched fertile cell of aecidium or primary uredosorus, x 1200; after Dittschlag. Fig. 178. Phragmidiicm Potentillae-Canadensis Diet.; a. conjugation; b. branched fertile cell; after Christman.. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.. Gwynne-Vaughan, Helen Charlotte Isabella (Fraser) Dame, 1879-. Cambridge [Eng] University Press
RMME6KDM–. Die Natürlichen Pflanzenfamilien nebst ihren Gattungen und wichtigeren Arten, insbesondere den Nutzpflanzen, unter Mitwirkung zahlreicher hervorragender Fachgelehrten begründet . Fig. 53. A Ein djirch Aecidium elatinum Alb. et Schw. erzeugter Hesenbesen der WeiÃtanne, ca. â / Eine einzelne Zapfenschupiie mit den Aeci- dien in nat. Or. (AâC nach Fbotographieen von Dr. C. von Tuben f. h Original.) Fig. 53 Ã). Diese Zweige werden in Scandinavien gegessen. Die Sporenlager, von einer ziemlich dauerhaften, unregelmäÃig aufreiÃenden Pseudoperidie bedeckt, bilden auf den Nadeln längliche, oft di
RMRDEH8N–. Minnesota plant diseases. Plant diseases. Minnesota Plant Diseases. 53 ual, it is living parasitically on the remainder of the host plant. That the broom itself is not injured, but rather stimulated, in its growth is seen, by the production of such numerous and large-sized branches. But the ultimate effect upon the whole. Fig. 23.—Witches'-broom on balsam fir, caused by a rust fungus (Aecidium elatinuin). The branches of the broom are vertical instead of horizontal, as are the normal, un- diseased branches in the right of the picture. Original. plant is injurious because the normal balance o
![. I'iG. 87.—Puccinia asparagi. 1, aecidium stage on a young shoot of asparagus ; 2, teleutospore stage on a summer plant; 3, aecidiospores; 4, uredospores; 5, teleutospores. l*"ig- 2 reduced, remainder variously mag. bright orange spores. The pustules of summer-spores and winter-spores develop at a later stage, and arc mostly con- fined to the leaves, where they appear under the form of minute brown or blackish pustules which soon become powdery. I. Forming large orange patches on stem and leaves. Spores subglobose, minutely warted, pale yellow, 35-45 X 18-25 /i. II. Small brown pustules Stock Photo](https://c8.alamy.com/comp/MCKCBJ/iig-87puccinia-asparagi-1-aecidium-stage-on-a-young-shoot-of-asparagus-2-teleutospore-stage-on-a-summer-plant-3-aecidiospores-4-uredospores-5-teleutospores-lquotig-2-reduced-remainder-variously-mag-bright-orange-spores-the-pustules-of-summer-spores-and-winter-spores-develop-at-a-later-stage-and-arc-mostly-con-fined-to-the-leaves-where-they-appear-under-the-form-of-minute-brown-or-blackish-pustules-which-soon-become-powdery-i-forming-large-orange-patches-on-stem-and-leaves-spores-subglobose-minutely-warted-pale-yellow-35-45-x-18-25-i-ii-small-brown-pustules-MCKCBJ.jpg ". I'iG. 87.—Puccinia asparagi. 1, aecidium stage on a young shoot of asparagus ; 2, teleutospore stage on a summer plant; 3, aecidiospores; 4, uredospores; 5, teleutospores. l*"ig- 2 reduced, remainder variously mag. bright orange spores. The pustules of summer-spores and winter-spores develop at a later stage, and arc mostly con- fined to the leaves, where they appear under the form of minute brown or blackish pustules which soon become powdery. I. Forming large orange patches on stem and leaves. Spores subglobose, minutely warted, pale yellow, 35-45 X 18-25 /i. II. Small brown pustules Stock Photo")
RMMCKCBJ–. I'iG. 87.—Puccinia asparagi. 1, aecidium stage on a young shoot of asparagus ; 2, teleutospore stage on a summer plant; 3, aecidiospores; 4, uredospores; 5, teleutospores. l*"ig- 2 reduced, remainder variously mag. bright orange spores. The pustules of summer-spores and winter-spores develop at a later stage, and arc mostly con- fined to the leaves, where they appear under the form of minute brown or blackish pustules which soon become powdery. I. Forming large orange patches on stem and leaves. Spores subglobose, minutely warted, pale yellow, 35-45 X 18-25 /i. II. Small brown pustules
![. Fungi, ascomycetes, ustilaginales, uredinales. Fungi. CH. Vlll] UREDINALES 197 of the spore forms other than the teleutospore, such as Aecidium, Caeoma and Uredo, still survive in our nomenclature. The teleutospores (figs. 164, 165, 166) may be unicellular or they may be made up of two or more cells forming a compound structure, each cell of. Fig 165- Cronnrtimit asdepiadetim Fr.; te- leutospore mass with basi.iia and spores; af- ter Tulasne. Fig. 166. Mdainpsora betulina Desmaz.; germinating teleutospores; after Tulasne. which germinates independently. The teleutospore is simple in Uromyces Stock Photo](https://c8.alamy.com/comp/RDX0RG/fungi-ascomycetes-ustilaginales-uredinales-fungi-ch-vlll-uredinales-197-of-the-spore-forms-other-than-the-teleutospore-such-as-aecidium-caeoma-and-uredo-still-survive-in-our-nomenclature-the-teleutospores-figs-164-165-166-may-be-unicellular-or-they-may-be-made-up-of-two-or-more-cells-forming-a-compound-structure-each-cell-of-fig-165-cronnrtimit-asdepiadetim-fr-te-leutospore-mass-with-basiiia-and-spores-af-ter-tulasne-fig-166-mdainpsora-betulina-desmaz-germinating-teleutospores-after-tulasne-which-germinates-independently-the-teleutospore-is-simple-in-uromyces-RDX0RG.jpg ". Fungi, ascomycetes, ustilaginales, uredinales. Fungi. CH. Vlll] UREDINALES 197 of the spore forms other than the teleutospore, such as Aecidium, Caeoma and Uredo, still survive in our nomenclature. The teleutospores (figs. 164, 165, 166) may be unicellular or they may be made up of two or more cells forming a compound structure, each cell of. Fig 165- Cronnrtimit asdepiadetim Fr.; te- leutospore mass with basi.iia and spores; af- ter Tulasne. Fig. 166. Mdainpsora betulina Desmaz.; germinating teleutospores; after Tulasne. which germinates independently. The teleutospore is simple in Uromyces Stock Photo")
RMRDX0RG–. Fungi, ascomycetes, ustilaginales, uredinales. Fungi. CH. Vlll] UREDINALES 197 of the spore forms other than the teleutospore, such as Aecidium, Caeoma and Uredo, still survive in our nomenclature. The teleutospores (figs. 164, 165, 166) may be unicellular or they may be made up of two or more cells forming a compound structure, each cell of. Fig 165- Cronnrtimit asdepiadetim Fr.; te- leutospore mass with basi.iia and spores; af- ter Tulasne. Fig. 166. Mdainpsora betulina Desmaz.; germinating teleutospores; after Tulasne. which germinates independently. The teleutospore is simple in Uromyces
RMMCK64W–. Fig. 18i.âPuccinia graminis. A, Portion of transvei-se section of leaf of Bcrberis vulgaris, with a young aecidinm under the epidermis, v.. I. Section through an aecidium-bearing spot of a Barberry leaf. At x the normal structure and thickness of the leaf is shown, the portion u to p is abnormally thickened ; It to o, upper siirfaco of the leaf; sp, pyenidia ; a, aecidia , sectiu a peridinui (â |»i-(-l in -u: ^11. Matmv t^l. i, . 1 in. TclcUlos'l..,,. '.', ;,ll at its apex, the urcdcsjH (After l)e Bary, from Sach's Lehrbuxh.) -â¢idium marked p alone (without «) shows ly. mg through the ep
RMRH1JC2–. The British rust fungi (Uredinales) their biology and classification. Rust fungi -- Great Britain. PUCCINIA POARUM 47 as shown in radial section. The outer edge of each cell is more prolonged downwards so as to overlap a portion of the cell below in an imbricated manner. The aecidium, in both, as is the. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.. Grove, W. B. (William Bywater), 1848-1938. Cambridge, University Press
RMMCK61M–. Fio. 252.—Aecidium coruxcans on malformed shoots of .Spnice. The compact abnormal shoots thickly covered with white aecidia contrast strongly with the normal portions, (v. Tubeiif phot, from material presented by Prof. Fries, Upsala.) P. Engelmanni Tlniiii. Ou coiie.s of Picea Smithiana. (U. S. America.) P. piceae PJarcl. On needle.s of Picea Smithiana. P. Peckii Thiiiu. On needles of T.mga canadensis (U.S. America). P. balsameum Peck. On needles of Abies halsamea (U.S. America). P. ephedrae CVjoke. On Ephedra in U.S. America. P. cedri 15arcl. On needles of Cedrus Deodara in India. P. Balans
RMRDED39–. Diseases of plants induced by cryptogamic parasites : introduction to the study of pathogenic Fungi, slime-Fungi, bacteria, & Algae . Plant diseases; Parasitic plants; Fungi. 386 UREDINEAE. The aeeidia are developed about the beginning of June, and on Crataegus their peridia in dehiscing split up into very- narrow lobes so as to form a bristly tuft over the mouth of. each aecidium. On cultivating infected plants of Crataegus indoors, I found the peridia to develop quite abnormally; they. Please note that these images are extracted from scanned page images that may have been digitally enh
RMMCR92G–. Abb. 13. Schrocleriaster alpinus. 1. Eine Uredospore. 2. Schnitt durch ein Teleutobporenlager. 3. Zwei Etagen von Teleutosporen. Ob dieses Aecidium hierher oder nur zu Puccinia Phragmitis gehört, ist allerdings noch fraglich. Die Teleutosporen sind dicht zusammengeklebt und weil sich immer neue und neue Sporen aus der Basalschicht entwickeln, so entstehen auf diese Weise 4 —5schichtige Lager. Puccinia Persoon. Spermogonien wie bei Uromyces. A e c i d i e n ebenso; nur bei einigen Arten fehlt das Pseudoperidium und anstatt dessen sind die Aecidien an der Aussenseite von einem Hy p h e n m ant
RMRDJ604–. Fungous diseases of plants : with chapters on physiology, culture methods and technique . Fungi in agriculture. 394 FUNGOUS DISEASES OF PLANTS larger branch cutting off an apical cell. The smaller gamete in time loses its nucleus by migration through a pore into the larger gamete, and the cells thus provided with two nuclei become each properly the basal cell of one of the chains of spores which arise in this type, corresponding to the aecidium, each spore of which. Fig. 194. Phracmidium speciosum: Development of ^Ecidiospores (After Christman) u, progametes ; b, gamete and sterile cell; t',
RMMCR930–. Alib. 9. Teleutosporeii von Lhomyres Behenis. lariae Opiz)! Katharinaberg bei Reichenberg (Kabätj! Teplitz (Thümen); Ilerrns- kretschen (Wagner); St. Peter und Spiudelmühle im Riesengebirge (Scliroeter). â Täbor! Diese Spezies ist dadurch biologisch interessant, dass das sporidiengeborene Mycel Aecidien und Teleutosporen bildet und dass die Aecidien durch die ganze Vegetationsperiode wiederholt werden (Dietel). 28. Uromyces Scrophulariae (De CandoUe) Winter. â Aecidium S c r o p h u- 1 a r i ae De Candolle. S p e r m 0 g 0 n i e n honiggelb, vereinzelt oder gruppenweise zwischen den Aeci
RMRH809A–. Botany of the living plant. Botany; Plants. 434 BOTANY OF THE LIVING PLANT and the aecidium-stage on the common Nettle, causing contorted swellings upon its stem and leaves. Thus the Rust of Wheat is an example of a life-history that is not uncommon.. Fig. 330. Part of shoot of Barberry with leaves attacked by Puccinia graminis which forms yellow cushions, or cluster-cups, on the leaf-blades and stalks. (After Marshall Ward.) Sections through a diseased leaf of wheat in summer reveal the branched and septate hyphae closely packed in the intercellular spaces, and investing the green cells. Th
RMME83GM–. Die Krankheiten der Pflanzen; ein Handbuch für Land- und Forstwirte, Gärtner, Gartenfreunde und Botaniker . ^V-ig. 40. Xauuenjnjeig mit â iiäbrigeiu ^3cinibefcu (a) oou Aecidium elatinam; auö bem uerbirfteu leilc beö iJauuenjuieigeä ift eine fd)lafcubc Muofpe b ein S^br fpäter ^uui 5(uc^treibcu gefünnneu unb cutuücfelt fid) ebeu= fall^ö alö Jpereubcfen. 2luf ber lluterfeite ber i^labeln ber -s^ereubefen fiet)t mau bie 5lcibieufriic^te. 5^ad) j)t. .öartig. 0 3- ^WüUcr, bie jRoftpil^e ber Rosa- ^ Rubus-3lrteu. XV. 1886, pag. 740. 2) 33ot. 3eitg. 1867, m. 33. öranf -Tle Ãrann)
RMRDD7PA–. Diseases of plants induced by cryptogamic parasites : introduction to the study of pathogenic Fungi, slime-Fungi, bacteria, & Algae . Plant diseases; Parasitic plants; Fungi. 358 UKEDINEAE. some confusion between plants infested with this Puccinia and those with species of Aecidium. The changes induced on anemone by either Aecidium leucospermum D.C. or Aec. puTictatum Pers. are quite distinct (Fig. 190).. Fig. 191.—Puceinia ribis on Red Currant {Ribes rubrum). Teleutospore-patches on leaves and fruit, (v. Tubeuf phot.) P. singularis Magu. On Anemone ranunculoides in Austria and south-eas
RMRDED4K–. Diseases of plants induced by cryptogamic parasites : introduction to the study of pathogenic Fungi, slime-Fungi, bacteria, & Algae . Plant diseases; Parasitic plants; Fungi. Fig. 205.—Calypiospora Goeppertiana. Aecidia on the under surface of needles of Silver Fir. (v. Tubeuf del.). Fig. 206.—Aeoidium in a needle of Silver Fir (much enlarged). 6, Series of aecidiospores and intermediate cell^. c, Germinating aecidiospores. (After B. Hartig.) This aecidium is also found on Aiies cephalonica in Upper Bavaria. Barclayella deformans Diet.^ This has been found in the Himalaya region on needl
![. Botany of the living plant. Botany. 444 BOTANY OF THE LIVING PLANT surface. This stage was first described as " Cluster-Cup^," and regarded as a distinct fungal disease under the name of Aecidium berberidis (Fig. 376). But it is now known that the spores produced by the cups are able on germination to cause a new infection of the. Fig. 377. Longitudinal section of a leaf of Wheat, showing a tuft of Uredo-spores bursting through the epidermis. Highly magnified. (After Marshall Ward.) leaves of the Wheat plant, which results again in the growth of a mycelium bearing the uredo-spores. Stock Photo](https://c8.alamy.com/comp/RH8DR8/botany-of-the-living-plant-botany-444-botany-of-the-living-plant-surface-this-stage-was-first-described-as-quot-cluster-cupquot-and-regarded-as-a-distinct-fungal-disease-under-the-name-of-aecidium-berberidis-fig-376-but-it-is-now-known-that-the-spores-produced-by-the-cups-are-able-on-germination-to-cause-a-new-infection-of-the-fig-377-longitudinal-section-of-a-leaf-of-wheat-showing-a-tuft-of-uredo-spores-bursting-through-the-epidermis-highly-magnified-after-marshall-ward-leaves-of-the-wheat-plant-which-results-again-in-the-growth-of-a-mycelium-bearing-the-uredo-spores-RH8DR8.jpg ". Botany of the living plant. Botany. 444 BOTANY OF THE LIVING PLANT surface. This stage was first described as " Cluster-Cup^," and regarded as a distinct fungal disease under the name of Aecidium berberidis (Fig. 376). But it is now known that the spores produced by the cups are able on germination to cause a new infection of the. Fig. 377. Longitudinal section of a leaf of Wheat, showing a tuft of Uredo-spores bursting through the epidermis. Highly magnified. (After Marshall Ward.) leaves of the Wheat plant, which results again in the growth of a mycelium bearing the uredo-spores. Stock Photo")
RMRH8DR8–. Botany of the living plant. Botany. 444 BOTANY OF THE LIVING PLANT surface. This stage was first described as " Cluster-Cup^," and regarded as a distinct fungal disease under the name of Aecidium berberidis (Fig. 376). But it is now known that the spores produced by the cups are able on germination to cause a new infection of the. Fig. 377. Longitudinal section of a leaf of Wheat, showing a tuft of Uredo-spores bursting through the epidermis. Highly magnified. (After Marshall Ward.) leaves of the Wheat plant, which results again in the growth of a mycelium bearing the uredo-spores.
![. Diseases of plants induced by cryptogamic parasites : introduction to the study of pathogenic Fungi, slime-Fungi, bacteria, & Algae . Plant diseases; Parasitic plants; Fungi. EFFECT OF PARASITIC FUNGI ON THE FORM OF HOST-PLANT. 23 ranunculoides under the influence of Aecidium punctahim. In the simpler cases the floral leaves were narrow, elongated, and greenish, stamens were formed but not carpels; in more pro- nounced cases, the petals were only represented as small, simple,. Fig. 5.—Cherry tree in blossom, with three "witches' brooms" in foliage, (v. Tubeuf phot.) stalked, gr Stock Photo](https://c8.alamy.com/comp/RDDWYH/diseases-of-plants-induced-by-cryptogamic-parasites-introduction-to-the-study-of-pathogenic-fungi-slime-fungi-bacteria-amp-algae-plant-diseases-parasitic-plants-fungi-effect-of-parasitic-fungi-on-the-form-of-host-plant-23-ranunculoides-under-the-influence-of-aecidium-punctahim-in-the-simpler-cases-the-floral-leaves-were-narrow-elongated-and-greenish-stamens-were-formed-but-not-carpels-in-more-pro-nounced-cases-the-petals-were-only-represented-as-small-simple-fig-5cherry-tree-in-blossom-with-three-quotwitches-broomsquot-in-foliage-v-tubeuf-phot-stalked-gr-RDDWYH.jpg ". Diseases of plants induced by cryptogamic parasites : introduction to the study of pathogenic Fungi, slime-Fungi, bacteria, & Algae . Plant diseases; Parasitic plants; Fungi. EFFECT OF PARASITIC FUNGI ON THE FORM OF HOST-PLANT. 23 ranunculoides under the influence of Aecidium punctahim. In the simpler cases the floral leaves were narrow, elongated, and greenish, stamens were formed but not carpels; in more pro- nounced cases, the petals were only represented as small, simple,. Fig. 5.—Cherry tree in blossom, with three "witches' brooms" in foliage, (v. Tubeuf phot.) stalked, gr Stock Photo")
RMRDDWYH–. Diseases of plants induced by cryptogamic parasites : introduction to the study of pathogenic Fungi, slime-Fungi, bacteria, & Algae . Plant diseases; Parasitic plants; Fungi. EFFECT OF PARASITIC FUNGI ON THE FORM OF HOST-PLANT. 23 ranunculoides under the influence of Aecidium punctahim. In the simpler cases the floral leaves were narrow, elongated, and greenish, stamens were formed but not carpels; in more pro- nounced cases, the petals were only represented as small, simple,. Fig. 5.—Cherry tree in blossom, with three "witches' brooms" in foliage, (v. Tubeuf phot.) stalked, gr
RMRH8XGR–. Botany for high schools and colleges. Botany. UREDINE^. 311 hjpliae, wliicli penetrate between the cells, causing the leaves to become usually much thickened and distorted in those parts which are infested with the parasitic growths. Oc-. Fig. 216.—Several stages of Puecinia graminis. A, part of a vertical section of a leaf of the Barberry {Berberis vulgaris), with a young unopened ascidium fruit; u, epidermis. /., section of a Barberry leaf, natural thickness at X, greatly thickened from h toward y; u, epidermis of the under surface ; o, of the upper surface ; p, unopened aecidium fruit; «,
![. Fungi, ascomycetes, ustilaginales, uredinales. Fungi. VIII] UREDINALES 207. Fig. 183. Coleosporium Son- chi ; uredosorus, x 545 ; after Holden and Harper. group of basal cells of indefinite extent, from which the aecidiospore mother- cells are cut off The aecidium is, in fact, no more a definite organ than the uredo- or teleutosorus, and only appears so in the more elaborate forms because of the modification of its peripheral cells to form a pseudoperidium. The important distinction lies not in the general morpho- logy of the sorus, but in the fact that an association of two nuclei from diff Stock Photo](https://c8.alamy.com/comp/RDX0HR/fungi-ascomycetes-ustilaginales-uredinales-fungi-viii-uredinales-207-fig-183-coleosporium-son-chi-uredosorus-x-545-after-holden-and-harper-group-of-basal-cells-of-indefinite-extent-from-which-the-aecidiospore-mother-cells-are-cut-off-the-aecidium-is-in-fact-no-more-a-definite-organ-than-the-uredo-or-teleutosorus-and-only-appears-so-in-the-more-elaborate-forms-because-of-the-modification-of-its-peripheral-cells-to-form-a-pseudoperidium-the-important-distinction-lies-not-in-the-general-morpho-logy-of-the-sorus-but-in-the-fact-that-an-association-of-two-nuclei-from-diff-RDX0HR.jpg ". Fungi, ascomycetes, ustilaginales, uredinales. Fungi. VIII] UREDINALES 207. Fig. 183. Coleosporium Son- chi ; uredosorus, x 545 ; after Holden and Harper. group of basal cells of indefinite extent, from which the aecidiospore mother- cells are cut off The aecidium is, in fact, no more a definite organ than the uredo- or teleutosorus, and only appears so in the more elaborate forms because of the modification of its peripheral cells to form a pseudoperidium. The important distinction lies not in the general morpho- logy of the sorus, but in the fact that an association of two nuclei from diff Stock Photo")
RMRDX0HR–. Fungi, ascomycetes, ustilaginales, uredinales. Fungi. VIII] UREDINALES 207. Fig. 183. Coleosporium Son- chi ; uredosorus, x 545 ; after Holden and Harper. group of basal cells of indefinite extent, from which the aecidiospore mother- cells are cut off The aecidium is, in fact, no more a definite organ than the uredo- or teleutosorus, and only appears so in the more elaborate forms because of the modification of its peripheral cells to form a pseudoperidium. The important distinction lies not in the general morpho- logy of the sorus, but in the fact that an association of two nuclei from diff
RMRH1J04–. The British rust fungi (Uredinales) their biology and classification. Rust fungi -- Great Britain. ON UMBELLIFER.E 185 the petioles sometimes very large, scattered or confluent, roundish, pulverulent, blackish-brown; spores ellipsoid to ob- long, rounded above, not thickened, hardly constricted, rounded or gently attenuated below, smooth, brown, 30—50 x 15—23 /a; pedicels hyaline, thin, deciduous, about as long as the spore. On Apiam graveolens. Not common. iEcidia in May and June; teleutospores September—November. Distinguished from many of its close allies by the possession of an aecidium.
RMREF63M–. Comparative morphology of Fungi. Fungi. 556 COMPARATIVE MORPHOLOGY OF FUNGI called peridium for short. A further development in breadth is unknown in them; in many cases, however, no sharp difference between caeoma and aecidium can be drawn, for there also appear in groups with well- developed peridia, species with peridia rudimentary or almost lacking. The development of the caeoma will be first described, e.g., Phrag- midium violaceum (Blackman, 1904; Welsford, 1915), P. speciosum (Christman, 1905), P. disciflorum (P. subcorticium) (Mme. Moreau, 1914) Gymnoconia Peckiana (Christman, 1905;
RMRE37H8–. The British rust fungi (Uredinales) their biology and classification. Rust fungi. ON UMBELLIFERiE 187 to have been shown experimentally that the secidia and the teleutospores described above are genetically connected. The markings on the teleuto- spore are really little-, round, densely crowded pits, not actual reticulations as in P. Chaerophylli. — Plowright's statement {I.e. p. 270) that this aecidium was found by him on Conopodium denudatmn is a mere slip of the memory, as I am informed by Mr W. G. Smith, in whose company it was found at Leagrave, near Dunstable, on the date mentioned. Di
RMRDYFY0–. A textbook of botany for colleges and universities ... Botany. would seem to be a ves- After TuLASNE. tigial one. The other structure produced by the my- celium in the barberry leaf is the aecidium or clusterciip. The aecidia usually appear in groups on the lower leaf surface, each opening upon the surface as a cup containing numer- ous simple sporophores bearing rows of spores, „,, , , the aecidiospores (fig. 196). The scattered Fig. 195. — Wheal rust: a r o y / spermogonium (producing aecidiospores that fall upon young wheat spermatia) arising from the plants germinate, the host is penet
RMRDX0G6–. Fungi, ascomycetes, ustilaginales, uredinales. Fungi. 212 PROTOBASIDIOMYCETES [CH. â â¢:⢠:â m Fig. i88. Uromyces Poae Raben.; conjut^nte divi<;ions in aecidium, x 1330; after Blacliman and Fraser. fication and in some cases it shows but few of the characters of normal mitosis. In the spermatial hyphae of Gymnosporangium clavariaeforme, for example, Blackman has described a condensation of the nucleus to form a deeply staining body out of which the nucleolus is squeezed. The chromatin is drawn apart into two apparently homogeneous masses between which a kinoplasmic thread represents the
![. The fungal diseases of the common larch . Larches. ^& (On the ground] %l I On Plant B I -y Fig. 71. of some definite species, the host b. In the case of the black rust of wheat, this plant is the barberry. The germ- tube which grows from a sporidium pierces the cuticle and enters an epidermal cell of the host B, and develops into a mycelium which fills the tissues, and gives rise to another special type of pustule, also usually rust-red in colour, which is called the aecidium. The aecidium pustules contain spores, known as aecidiospores, which are incapable of infecting plant b, but in Stock Photo](https://c8.alamy.com/comp/RDETG8/the-fungal-diseases-of-the-common-larch-larches-amp-on-the-ground-l-i-on-plant-b-i-y-fig-71-of-some-definite-species-the-host-b-in-the-case-of-the-black-rust-of-wheat-this-plant-is-the-barberry-the-germ-tube-which-grows-from-a-sporidium-pierces-the-cuticle-and-enters-an-epidermal-cell-of-the-host-b-and-develops-into-a-mycelium-which-fills-the-tissues-and-gives-rise-to-another-special-type-of-pustule-also-usually-rust-red-in-colour-which-is-called-the-aecidium-the-aecidium-pustules-contain-spores-known-as-aecidiospores-which-are-incapable-of-infecting-plant-b-but-in-RDETG8.jpg ". The fungal diseases of the common larch . Larches. ^& (On the ground] %l I On Plant B I -y Fig. 71. of some definite species, the host b. In the case of the black rust of wheat, this plant is the barberry. The germ- tube which grows from a sporidium pierces the cuticle and enters an epidermal cell of the host B, and develops into a mycelium which fills the tissues, and gives rise to another special type of pustule, also usually rust-red in colour, which is called the aecidium. The aecidium pustules contain spores, known as aecidiospores, which are incapable of infecting plant b, but in Stock Photo")
RMRDETG8–. The fungal diseases of the common larch . Larches. ^& (On the ground] %l I On Plant B I -y Fig. 71. of some definite species, the host b. In the case of the black rust of wheat, this plant is the barberry. The germ- tube which grows from a sporidium pierces the cuticle and enters an epidermal cell of the host B, and develops into a mycelium which fills the tissues, and gives rise to another special type of pustule, also usually rust-red in colour, which is called the aecidium. The aecidium pustules contain spores, known as aecidiospores, which are incapable of infecting plant b, but in
RMRDWG6R–. Elementary botany. Botany. 132 MORPHOLOG Y. is formed of similar rows of cells, which, instead of separating into gonidia, remain united to form a wall. These cups are usually borne on the under side of the leaf. 293. Spermagonia.—Upon the upper side of the leaves in the same spot occur small, orange-colored pustules which are flask-shaped. They bear inside, minute, rod-like bodies on the ends of slender threads, which ooze. Fig. 156. Section of an aecidium (cluster cupj from barberry leaf. (After Marshall-Ward.) out on the surface of the leaf. These flask-shaped pustules are- called spermag
RMREF63A–. Comparative morphology of Fungi. Fungi. UREDINALES 559 ribicola (Colley, 1918), C. Comptoniae, C. pyriforme (Adams, 1919), Uromyces Caladii (Christman, 1905; Fromme, 1914), Puccinia Caricis and P. Pruni-spinosae (Kursanov, 1922), the hyphae of the knot are arranged. Fig. 376.— Uromyces Poae. 1. Young aecidium. Fertile cells above and sterile degeneration cells below. 2. Immature aecidium with peridium, Per, and immature aeciospores, Sp. ( X 415; after Blackman and Fraser, 1906.) in a more or less palisade-like structure and are usually perpendicular to the plane of the epidermis, in a few sp
RMRD2HG0–. Elementary botany. Botany. 132 MOKPHOLOG V. is formed of similar rows of cells, which, instead of separating into gonidia, remain united to form a wall. These cups are usually borne on the under side of the leaf. 293. Spermagonia.—Upon the upper side of the leaves in the same spot occur small, orange-colored pustules which are flask-shaped. They bear inside, minute, rod-like bodies on the ends of slender threads, which ooze. Fig. 156. Section of an aecidium (cluster cup) from barberry leaf. (After Marshall-Ward.) out on the surface of the leaf. These flask-shaped pustules are called spermago
RMRDE5HK–. Fungoid and insect pests of the farm. Agricultural pests. 66 Rusts [OH.. Fig. 24. Pwxinia graminis. (1) Uredospore stage on wheat; (2)uredo- spore stage highly magnified; (3) uredospore stage very highly magnified; (4) uredospore germinating; (5) teleutospore stage on wheat; (6) teleutosporea; (7) a teleutospore germinating; (8) aecidio- spore stage on barherry leaf; (9) aecidium cup showing the chains of aecidiospores; (10) two aeoidium cups. (After Massee.). Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - colorati
![. Botany of the living plant. Botany. 444 BOTANY OF THE LIVING PLANT surface. This stage was first described as " Cluster-Cup^," and regarded as a distinct fungal disease under the name of Aecidium berberidis (Fig. 376). But it is now known that the spores produced by the cups are able on germination to cause a new infection of the. Fig. 377- Longitudinal section of a leaf of Wheat, sliowing a tuft of Uredo-spores bursting tlnrough tfie epidermis. Highly magnified, (.fter ]farshall Ward.) leaves of the Wheat plant, which results again in the growth of a mycelium bearing the uredo-s Stock Photo](https://c8.alamy.com/comp/RDY61T/botany-of-the-living-plant-botany-444-botany-of-the-living-plant-surface-this-stage-was-first-described-as-quot-cluster-cupquot-and-regarded-as-a-distinct-fungal-disease-under-the-name-of-aecidium-berberidis-fig-376-but-it-is-now-known-that-the-spores-produced-by-the-cups-are-able-on-germination-to-cause-a-new-infection-of-the-fig-377-longitudinal-section-of-a-leaf-of-wheat-sliowing-a-tuft-of-uredo-spores-bursting-tlnrough-tfie-epidermis-highly-magnified-fter-farshall-ward-leaves-of-the-wheat-plant-which-results-again-in-the-growth-of-a-mycelium-bearing-the-uredo-s-RDY61T.jpg ". Botany of the living plant. Botany. 444 BOTANY OF THE LIVING PLANT surface. This stage was first described as " Cluster-Cup^," and regarded as a distinct fungal disease under the name of Aecidium berberidis (Fig. 376). But it is now known that the spores produced by the cups are able on germination to cause a new infection of the. Fig. 377- Longitudinal section of a leaf of Wheat, sliowing a tuft of Uredo-spores bursting tlnrough tfie epidermis. Highly magnified, (.fter ]farshall Ward.) leaves of the Wheat plant, which results again in the growth of a mycelium bearing the uredo-s Stock Photo")
RMRDY61T–. Botany of the living plant. Botany. 444 BOTANY OF THE LIVING PLANT surface. This stage was first described as " Cluster-Cup^," and regarded as a distinct fungal disease under the name of Aecidium berberidis (Fig. 376). But it is now known that the spores produced by the cups are able on germination to cause a new infection of the. Fig. 377- Longitudinal section of a leaf of Wheat, sliowing a tuft of Uredo-spores bursting tlnrough tfie epidermis. Highly magnified, (.fter ]farshall Ward.) leaves of the Wheat plant, which results again in the growth of a mycelium bearing the uredo-s
RMREF63X–. Comparative morphology of Fungi. Fungi. Fig. 372.—Types of aecia. 1. Caeoma of Phragmidium Rubi. P, paraphyses. 2. Aecidium of Uromyces Erythronii. Per, peridium. (1 X 400; 2 X 300; after Sappin- Trouffy, 1896.) lum Sempervivi and Puccinia obtegens (P. suaveolens), they have a sweetish odor, in Gymnoconia Rosae, an offensive odor. Their further develop- ment is unknown. In some species, e.g., Phragmidium violaceum, they appear to degenerate early (Blackman, 1904); in others, as Cronartium ribicola, they appear to be normal (Colley, 1918). In any case, they seldom germinate and when they do f
RMRDY61D–. Botany of the living plant. Botany. EU-MYCETES.—(fe) BASIDIOMYCETES 445 the uredo-spores and teleuto-spnres are on leaves of species of Carex, and the aecidium-stage on the common Nettle, causing contorted swellings upon its stem and leaves. Thus the Rust of Wheat is an example of a life-history that is not uncommon.. Fig. 379. Longitudinal section of a leaf of Wheat, showing a germ-tube of a C/retio-spore passing through a stoma {a) into the intercellular space {b). Very highly magnified. (After Marshall Ward.) Sections through a diseased leaf of wheat in summer reveal the branched and sept
RMRDHNWP–. Elements of plant biology. Plant physiology. LIFE HISTORY OF RUST FUNGI 179. on the surface, and the aggregation of protoplasm in the branched apex. X 475. C, single teleutospore. X 200. D, germination of teleutospore of another rust fungus and formation of sporidia. X 475. E, aecidium cup of another form in vertical section (crossrsection of leaf) ; myc, mycelium of the fungus; is, aecidio- spores; It., leaf tissue; ep., epidermis of leaf. (After De Bary.) X 150. F, germination of secidiospore on a grass leaf, penetration of a stoma by and branching of the germ tube. X 475. (All except E af
RMRHXWBP–. Beitrge zur Kryptogamenflora der Schweiz. . Die nebenstehen- den Figuren 2 und 3 stellen die Te- leutosporen bei- der Arten, genau mit Hilfe des Zeichenapparates entworfen, dar. Ebenso Fig. 2. Puccinia Caricis-frigidae: a. ans dem Walde gegenüber Celei'ina, neben dem Aecidium auf Cirsium lieterophyUum; b. am Wege von Silvaplana zum Hahnensee. Vergr. 620.. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.. Schweizerische Bota
RMRH2RND–. The British rust fungi (Uredinales) their biology and classification. Rust fungi -- Great Britain. 334 i:lHiNIVLLUM Teleutospores. Sori hypophyllous or occasionally epiphyllous, more or less covering the whole surface, crowded, aecidium-like, sunk in tlif leaf-tissue which is slightly swollen, surrounded by a thin peridium in the shape of a shallow cup, with a short,. Fig. 251. E. Euphorbiae-silvaticae. a, affected leaf of E. amygdaloid.es, nat. size; b, aecidio-teleutospore; c, germinating spore; d, another, not so advanced, x 540; e, inner, and /, outer wall of peridium-cell, x GOO. torn,
RMRH9ATW–. Botanisches Zentralblatt; referierendes Organ für das Gesamtgebiet der Botanik. Botany; Botany. Botaniska Sektionen af Naturvetenskapliga Studentsällskapet i Upsala, 379 Dagegen^ fand Vortr. in den alpinen Regionen bei Storlien und auf dem Areskuta ein anderes Aecidium auf derselben Smcssurea. Dieses kam in der Gesellschaft einer Teleutosporen-Form auf Carex rupestris L. vor. Auch an diesen Standorten waren andere Crtreic-Arten, auch C. vaginata, von Teleutosporen frei. Die beiden Aecidien sind sowohl makro- wie mikroskopisch leicht zu unterscheiden. Dagegen sind die zwei Puccmien einander s
RMRH1JB8–. The British rust fungi (Uredinales) their biology and classification. Rust fungi -- Great Britain. Fig. 27. P. Poarum. An recidio- spore germinating on leaf of Poa annua. x 180.. Fig. 26. P. Poarum. Vertical section through edge of aecidium; showing a, the crushed cells of the upper myce- lium, pushed on one side ; b, the chain of peridium-cells; c, the spore bed, giving rise to d, the chains of a?cidio- spores. x 600. The black dots are the nucleoli; one aecidiospore-inother- cell has three nuclei. case in most of the higher forms of the Uredinales, arises deep Fig. 28. p. Poarum. o.ansecid
RMRG9A9W–. Bulletin. Mycology; Fungi; Fungi. CONTRllJUTIOiS A LA l'LOlŒ MYCOLOGIQUE. 265. Fig. 7. — PucciNiA AsPHODELi : a, un aecidium avec des spermogonies, vu de face, 1/20 ; c, cellule du pseudo-péridium en section radiale ; d, une même cellule vue de face ; e, partie du pseudo-péridium, 1/220 ; f, g, seci- diospores ; h, téleutospores ; en c, d, f, g et h, grossiss. 1/560.. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.. Socié
RMRE58G1–. Cryptogamic plants of the USSR. (Flora sporovykh rastenii SSSR). Plants. OnPicea, Ledum 4. Chrysomyxa woroninii Tranz., Tranzschel, Tr. Bot. Muzeya Akad. Nauk, II, 1905, p. 23; Centrbl. Bakteriol. II. Abt., XI, 1903, S.106, 111; Tranzschel, Consp. Ured. URSS, Moscow, 1939, p. 71, 311, 31 3, fig. 13b. Syn. : Aecidium coruscans Fries, Physiogr. Sallskap. Aarsb., Lund, 1824, p. 92; Klebahn, Kryptogfl. M. Brandb. Va, 1914, S. 862, Fig. X2 (S.856). Spermagonia mainly at the tip of leaves in different areas, sunken into their mesophile, not covered by the epidermis but apparently breaking through
![. Aus der Heimath. Natural history; Natural history -- Germany. S" c d) r c g i |l c v. Stbartcn. 314. ülbcntjittcl. 93. Abies reginae Amaliae. 4S0. Acer campcstre. 12(3. SlccIimntifatiLni. 29. Acaru.s t'Cclcsiasticiis. 575. Acarus folliculorum. 42. Sltleifatrn. 216. Aecidium, Euphorb. Anemones. 555. Aegilops ovata. 081. Apgilops triticouli'.'i f>S3. «ftfrfrDftiillf. 591. Agave americana. 525. Agf. Slfin. 59. 61. Agriotrialaphillia. Sl5. Slliijui. 223. Slftinicn. 220. Sllgicier OBiillc. 319. 9Ulh, .amciif.inifchc. 524. SllVfiipfianjcn. 69. Sllpfce. 19. 9Utcr*f(bä^iinfl luicl) .t?ii Stock Photo](https://c8.alamy.com/comp/RJRR38/aus-der-heimath-natural-history-natural-history-germany-squot-c-d-r-c-g-i-l-c-v-stbartcn-314-lbcntjittcl-93-abies-reginae-amaliae-4s0-acer-campcstre-123-slcciimntifatilni-29-acarus-tcclcsiasticiis-575-acarus-folliculorum-42-sltleifatrn-216-aecidium-euphorb-anemones-555-aegilops-ovata-081-apgilops-triticoulii-fgts3-ftfrfrdftiillf-591-agave-americana-525-agf-slfin-59-61-agriotrialaphillia-sl5-slliijui-223-slftinicn-220-sllgicier-obiillc-319-9ulh-amciifinifchc-524-sllvfiipfianjcn-69-sllpfce-19-9utcrfbiinfl-luicl-tii-RJRR38.jpg ". Aus der Heimath. Natural history; Natural history -- Germany. S" c d) r c g i |l c v. Stbartcn. 314. ülbcntjittcl. 93. Abies reginae Amaliae. 4S0. Acer campcstre. 12(3. SlccIimntifatiLni. 29. Acaru.s t'Cclcsiasticiis. 575. Acarus folliculorum. 42. Sltleifatrn. 216. Aecidium, Euphorb. Anemones. 555. Aegilops ovata. 081. Apgilops triticouli'.'i f>S3. «ftfrfrDftiillf. 591. Agave americana. 525. Agf. Slfin. 59. 61. Agriotrialaphillia. Sl5. Slliijui. 223. Slftinicn. 220. Sllgicier OBiillc. 319. 9Ulh, .amciif.inifchc. 524. SllVfiipfianjcn. 69. Sllpfce. 19. 9Utcr*f(bä^iinfl luicl) .t?ii Stock Photo")
RMRJRR38–. Aus der Heimath. Natural history; Natural history -- Germany. S" c d) r c g i |l c v. Stbartcn. 314. ülbcntjittcl. 93. Abies reginae Amaliae. 4S0. Acer campcstre. 12(3. SlccIimntifatiLni. 29. Acaru.s t'Cclcsiasticiis. 575. Acarus folliculorum. 42. Sltleifatrn. 216. Aecidium, Euphorb. Anemones. 555. Aegilops ovata. 081. Apgilops triticouli'.'i f>S3. «ftfrfrDftiillf. 591. Agave americana. 525. Agf. Slfin. 59. 61. Agriotrialaphillia. Sl5. Slliijui. 223. Slftinicn. 220. Sllgicier OBiillc. 319. 9Ulh, .amciif.inifchc. 524. SllVfiipfianjcn. 69. Sllpfce. 19. 9Utcr*f(bä^iinfl luicl) .t?ii
![. Album der Natuur. . Aecidium Serheridis (tweede geüei*aiie van Puccinia gtaminis). Naar* ÖEËSTËD. A. Gedeelte der ondervlakte van het blad, niet sporocal*piën. Zwak vergroot. B. Gedeelte der bovenvlakte, met spermogoniën. C. Dwarse doorsnede van het aangedane blad, iets Sterker vei'groot; a spermogoniën, met de daarin bevatte draden, en de zich daarvan afsnoerende spermatiën h; c sporo- carpiam, nog onder de opperhuid; d mycelium; e geopend sporocarpium; ƒ daarin b e" vatte ketensporen. D. Draden der spermogoniën, waarvan zich de spermatiën afsnoeren. Zeer sterk vergroot. die den naam v Stock Photo](https://c8.alamy.com/comp/RPXFCA/album-der-natuur-aecidium-serheridis-tweede-geeiaiie-van-puccinia-gtaminis-naar-estd-a-gedeelte-der-ondervlakte-van-het-blad-niet-sporocalpin-zwak-vergroot-b-gedeelte-der-bovenvlakte-met-spermogonin-c-dwarse-doorsnede-van-het-aangedane-blad-iets-sterker-veigroot-a-spermogonin-met-de-daarin-bevatte-draden-en-de-zich-daarvan-afsnoerende-spermatin-h-c-sporo-carpiam-nog-onder-de-opperhuid-d-mycelium-e-geopend-sporocarpium-daarin-b-equot-vatte-ketensporen-d-draden-der-spermogonin-waarvan-zich-de-spermatin-afsnoeren-zeer-sterk-vergroot-die-den-naam-v-RPXFCA.jpg ". Album der Natuur. . Aecidium Serheridis (tweede geüei*aiie van Puccinia gtaminis). Naar* ÖEËSTËD. A. Gedeelte der ondervlakte van het blad, niet sporocal*piën. Zwak vergroot. B. Gedeelte der bovenvlakte, met spermogoniën. C. Dwarse doorsnede van het aangedane blad, iets Sterker vei'groot; a spermogoniën, met de daarin bevatte draden, en de zich daarvan afsnoerende spermatiën h; c sporo- carpiam, nog onder de opperhuid; d mycelium; e geopend sporocarpium; ƒ daarin b e" vatte ketensporen. D. Draden der spermogoniën, waarvan zich de spermatiën afsnoeren. Zeer sterk vergroot. die den naam v Stock Photo")
RMRPXFCA–. Album der Natuur. . Aecidium Serheridis (tweede geüei*aiie van Puccinia gtaminis). Naar* ÖEËSTËD. A. Gedeelte der ondervlakte van het blad, niet sporocal*piën. Zwak vergroot. B. Gedeelte der bovenvlakte, met spermogoniën. C. Dwarse doorsnede van het aangedane blad, iets Sterker vei'groot; a spermogoniën, met de daarin bevatte draden, en de zich daarvan afsnoerende spermatiën h; c sporo- carpiam, nog onder de opperhuid; d mycelium; e geopend sporocarpium; ƒ daarin b e" vatte ketensporen. D. Draden der spermogoniën, waarvan zich de spermatiën afsnoeren. Zeer sterk vergroot. die den naam v
RMRG6DWJ–. Bulletin trimestriel de la Société mycologique de France. Mycology; Fungi; Fungi. 162 lî. MAIRE. aEciDiuM PtarmicyE Sclirôt. Puccinia Vulpinvc Schrôt. 1. ? Sur les feuilles de Ptarmica i>ulgaj-is dans les prés tourbeux à Arc-sur-Tille (Côte-d'Or). /EciDiuM Valeiîianell.e Biv. Bernh. Sur Valerinnella microcarpa^ à Saïda (Algérie). ^E^CIDIUM RETICULATUM Tllun. Sur Alliuni Victorialis, au Holieneck (Vosges). Cette espèce n'était indiquée jusqu'ici qu'en Sibérie. C.EOMA Orchidis Alb. et Schw. Sur les feuilles d'Orc/us bifolia, au Drumont (Vosges). Uredo Andropogonis-hirti R. Mai
RMRE58HB–. Cryptogamic plants of the USSR. (Flora sporovykh rastenii SSSR). Plants. 248 Cal3T5tospora colvunnaris J.Kiihn in Rabenhorst et Winter, Fungi europ. No. 3521,1886; Hedwigia, XXVI, 1887, S.28; Arth., N. Amer. Fl. VII, 1907, p.114; 1925, p.646,819. Aecidium coluninare Alb. et Schw., Consp. Fung. Nisk., 1805, p. 121. Thekopsora goeppertisma Hirats., Journ. Soc. Agric. a. Forestr. Sapporo, XIX, 1927, p.167. Biol. Hartig, Allg. Forst- u. Jagdzeit., 1880, S.289; Flora, LXIV, 1881, p.45; Kiihn, Hedwigia, XXIV. 1885, S.108; XXVI, 1887, S.28; Bubak, Zentrbl. Bakteriol. II. Abt., XVI, 1906. S.154; Art
RMRE58ME–. Cryptogamic plants of the USSR. (Flora sporovykh rastenii SSSR). Plants. Uredinopsis pteridis D. et H., ex Dietel, Ber. Deutsch. bot. Ges. XIII, 1895, S.331, Taf. XXVI, Fig. 10, 11, Jaczewski, Hedwigia, XXXIX, 1900, S.(130), Fig. 3; Sacc, Sylloge, XVI, 1902, p.271; Arth., N.Amer. Fl. VII, 1907, p.116, pr.p.; Syd., Monogr. Ured. Ill, 1915, p.490, pr.p.; Weir a. Hubert, Amer. Journ. Bot. IV, 1917, p. 328, fig. 1,2; Hirats., Monogr. Pucciniastreae, 1936, p. 61, pr.p., tab. Ill, fig-l. Aecidium pseudobalsameum D. et H., Erythea, VII, 1899, p. 98. Peridermium pseudobalsameum (D. et H.) Arth. et K
RMRCD8X4–. Diseases of cultivated plants and trees. Plant diseases; Plants -- Wounds and injuries; Plants, Protection of; Trees -- Diseases and pests. MELAMPSORA 325 Pine branch twist.—The aecidium phase of Melampsora pinitorqua, ^ostxn^ {=Caeoma pinitorqiaan, A. Br.), has been shown by Hartig to be very destructive to young pines, seedlings being sometimes diseased as they appear above ground. About the age of thirteen the disease dies out, and those that have not been too severely attacked, recover. Plants that are attacked when quite young are usually killed,. Fig. ()Z.—Melampsora pinito?-qua. i, to
RMRCC3NR–. Diseases of plants induced by cryptogamic parasites; introduction to the study of pathogenic Fungi, slime-Fungi, bacteria, & Algae. Plant diseases; Parasitic plants; Fungi. AECIDIUM-FORMS. 407 in the growth of the wood disturbs the elements, so that they are irregularly developed and more or less twisted.^ A mycelium inhabits the tissues of abnormal twigs and cankered swellings. It grows in the intercellular spaces of the rind, between the bast cells and outer parts of the wood, and derives nutriment by means of haustoria : these either bore through the cell-walls, or only press closely
RMRCC3NY–. Diseases of plants induced by cryptogamic parasites; introduction to the study of pathogenic Fungi, slime-Fungi, bacteria, & Algae. Plant diseases; Parasitic plants; Fungi. AECIDIUM-FOKMS. 40r) prey to wood-destroyiug fungi.^ The presence of such rotting spots renders the tree liable to break over in their neighbour- hood, while they, as well as the swellings on the trunks, cause a considerable depreciation in the value of the timber. The malformations of the branch-system known as witches' brooms are frequently induced by this fungus. They occur as a rule on the horizontal branches and
RMRCC3D6–. Diseases of plants induced by cryptogamic parasites; introduction to the study of pathogenic Fungi, slime-Fungi, bacteria, & Algae. Plant diseases; Parasitic plants; Fungi. AECIDIUM-FOKMS. 40/ ill the growth of the wood disturbs the elements, so that they are irregularly developed and more or less twisted.^ A mycelium inhabits the tissues of abnormal twigs and cankered swellings. It grows in the intercellular spaces of the rind, between the bast cells and outer parts of the wood, and derives nutriment by means of haustoria: these either bore through the cell-walls, or only press closely
RMRCD8Y2–. Diseases of cultivated plants and trees. Plant diseases; Plants -- Wounds and injuries; Plants, Protection of; Trees -- Diseases and pests. GYMNOSPORANGIUM 315 chains. Closely allied to Phragmidhtm, differing mainly in the relatively greater number of cells forming the teleuto- spore. Both stages grow on the same host-plant. Burnet leaf spot {Xenodochus carbonarius, Schlecht.) is parasitic on this plant. The aecidium stage forms large, orange-red, roundish patches on the leaves, and elongated patches on the stems. This is followed by the black, wart- like pustules of the teleutospore stage o
RMRCC3CP–. Diseases of plants induced by cryptogamic parasites; introduction to the study of pathogenic Fungi, slime-Fungi, bacteria, & Algae. Plant diseases; Parasitic plants; Fungi. PERIDKRMIUJI. 417 The soft hypertrophied shoots are eaten. They occur chiefly in Scandinavia, but recently were observed by Gobi and Tranzschel in the neighbourhood of St. Petersburg.^. Fio. 252.—Aecidium coruxcans on malformed shoots of .Spnice. The compact abnormal shoots thickly covered with white aecidia contrast strongly with the normal portions, (v. Tubeiif phot, from material presented by Prof. Fries, Upsala.)
RMRCC3F9–. Diseases of plants induced by cryptogamic parasites; introduction to the study of pathogenic Fungi, slime-Fungi, bacteria, & Algae. Plant diseases; Parasitic plants; Fungi. pucciNiA. 343- hyphae forming the bottom of the uecidium-cup. These hyphae give rise to numerous short sporophores, from each of which a single long chain of spores is abjointed in basipetal succession, the spores being at first separated by temporary intermediate cells. The sporophores round the margin of each aecidium do not, however, give off spores; they also produce chains of cells basipetally, but these grow lar
![. Diseases of economic plants. Plant diseases. TREES AND TIMBER 439 vated perithecia, the cluster surrounded by a border of dead tissue. Premature defoliation results. The disease is very abundant in all parts of the United States. In- fected materials should be burned in the fall. Powdery mildew, uncinulose. See oak. Powdery mildew, phyliactinose. See oak, FILBERT. See hazel. FIR Rust (Aecidium elatinum All). & Schw.). — This cluster-cup fungus has been noted in Minnesota."^ It produces bushy distortions, 'Svitches' brooms," by causing profuse branch- ing of the affected part of Stock Photo](https://c8.alamy.com/comp/RCC6AE/diseases-of-economic-plants-plant-diseases-trees-and-timber-439-vated-perithecia-the-cluster-surrounded-by-a-border-of-dead-tissue-premature-defoliation-results-the-disease-is-very-abundant-in-all-parts-of-the-united-states-in-fected-materials-should-be-burned-in-the-fall-powdery-mildew-uncinulose-see-oak-powdery-mildew-phyliactinose-see-oak-filbert-see-hazel-fir-rust-aecidium-elatinum-all-amp-schw-this-cluster-cup-fungus-has-been-noted-in-minnesotaquot-it-produces-bushy-distortions-svitches-broomsquot-by-causing-profuse-branch-ing-of-the-affected-part-of-RCC6AE.jpg ". Diseases of economic plants. Plant diseases. TREES AND TIMBER 439 vated perithecia, the cluster surrounded by a border of dead tissue. Premature defoliation results. The disease is very abundant in all parts of the United States. In- fected materials should be burned in the fall. Powdery mildew, uncinulose. See oak. Powdery mildew, phyliactinose. See oak, FILBERT. See hazel. FIR Rust (Aecidium elatinum All). & Schw.). — This cluster-cup fungus has been noted in Minnesota."^ It produces bushy distortions, 'Svitches' brooms," by causing profuse branch- ing of the affected part of Stock Photo")
RMRCC6AE–. Diseases of economic plants. Plant diseases. TREES AND TIMBER 439 vated perithecia, the cluster surrounded by a border of dead tissue. Premature defoliation results. The disease is very abundant in all parts of the United States. In- fected materials should be burned in the fall. Powdery mildew, uncinulose. See oak. Powdery mildew, phyliactinose. See oak, FILBERT. See hazel. FIR Rust (Aecidium elatinum All). & Schw.). — This cluster-cup fungus has been noted in Minnesota."^ It produces bushy distortions, 'Svitches' brooms," by causing profuse branch- ing of the affected part of
RMRCC3D7–. Diseases of plants induced by cryptogamic parasites; introduction to the study of pathogenic Fungi, slime-Fungi, bacteria, & Algae. Plant diseases; Parasitic plants; Fungi. AECIDIUM-FOKMS. 405 prey to wood-destroying fungi.' The presence of such rotting spots renders the tree liable to break over in tlieir neighbour- hood, while they, as well as the swellings on the trunks, cause a considerable depreciation in the value of the timber. The malformations of the branch-system known as witclies' brooms are frequently induced by this fungus. They occur as a rule on tlie liorizontal branches a
RMRCC3XA–. Diseases of plants induced by cryptogamic parasites; introduction to the study of pathogenic Fungi, slime-Fungi, bacteria, & Algae. Plant diseases; Parasitic plants; Fungi. PUCCINIA. 343 hyphae forming the bottom of the aecidium-cup. These hyphae â give rise to numerous short sporophores, from each of which a single long chain of spores is abjointed in basipetal succession, the spores being at first separated by temporary intermediate cells. The sporophores round the margin of each aecidium do not, however, give off spores; they also produce chains of cells basipetally, but these grow la
RMRCD912–. Diseases of cultivated plants and trees. Plant diseases; Plants -- Wounds and injuries; Plants, Protection of; Trees -- Diseases and pests. 298 DISEASES OF CULTIVATED PLANTS Mint rust, caused by Puccinia fnenihae (Pers.), often com- pletely destroys entire beds of mint. All stages of the fungus are produced on the same host. The cluster-cup condition of the fungus appears first somewhat early in the season, and is most abundant on the stems, which become much twisted, distorted, and swollen, and more or less covered with the. I'iG. 87.—Puccinia asparagi. 1, aecidium stage on a young shoot of
RMRCHEMX–. Die Pilze Böhmens. Botany; Fungi. 159 Malus, Cydoiiia vulgaris, Sorbus latifolia, Aucuparia, torminalis, Aiuelaiichier cana- densis, vulgaris. Der genetische Zusamnienliang wurde zuerst von Oerstedt festgestellt. ü24. Oymnosporangiuni juniperiiium (Linnt^) Fries. — Aecidium cornu- tum Gmeliu. Spermngoaien auf der Oberseite orangefarbiger Flecke, in kleinen Gruppen, kegelförmig hervorragend. Aecidien auf der Unterseite derselben Flecke, auf verdicktem Gewebe gruppenweise, mit langen, walzenförmigen Pseudoperidien, nur wenig oder gar nicht zerschlitzt; Sporen kuglig bis länglich, oft polyedris
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