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Phragmidium Stock Photos and Images
RMF32CEX–Rose rust, Phragmidium mucronatum, pustules (urediospores, teliospores) formed on the lower leaf surface of an ornamental rose tree in summer, Berkshire, England, July
RF2JC1A6W–Rose rust, Phragmidium mucronatum, tuberculatum bulbosum and whitefly pupa on the underside of a rose leaf in the garden.
RF2R8R6YW–The Rose Rust Fungus caused by a fungus Phragmidium mucronatum and P. tuberculatum. Symptoms on ornamental roses in the garden.
RM2AN30W7–Fungi, Ascomycetes, Ustilaginales, Uredinales . lf ruptured and exposes the ripe spores. It becomes torn andrecurved so that the characteristic cluster-cup is produced (fig. 176). Thepseudoperidium is sometimes much elongated and cylindrical or inflated,producing the forms known as roestelia (Gymnosporangium), and peri-dermium (Coleosporium, Cronartium and allied genera), so-called from theirold generic names, or it may be represented only by a few paraphyses oraltogether absent (Phragmidium, Melampsord). The latter forms, to whichthe term caeoma is applied, are probably primitive. In the majo
RMPFEPNH–. Descriptions of new species of fungi. Fungi. Fleure 2—Summer or Uredo spores of the rasp- berry rust, Phragmidium rubi-idxi. Spore clus- ter ^iirrouuded by club-shaped sterile bodies paraphyses. (After Winter.) gones are absent and the spores are borne on stalks, from which they easily fall, instead of being in chains. It is found that later in the sea- son blackish winter spores follow each of these forms and serve to propagate the disease from year to year. The one on raspberries is Phragmidium rubi-idcei (Pers.) Wint., and that on blackberries is Pharagmidium rubi (Pers.) Wint., the names
RM2CGWXBB–Close-up of a vividly coloured Bramble leaf with what is probably violet bramble rust caused by the fungus Phragmidium violaceum. Plant disease.
RMMCK9A1–. Fig. 22.—Spots on blackberry stems caused by leaf-spot fungus. thracnose, and cane blight can be readily distinguished with the aid of a microscope by the spores of the fungi which cause each disease, but the symptoms on the plants are often difficult to distinguish. Practically, however, this is not important, since the treatment is the same as recom- mended for anthracnose (p. 44). Leaf Rust.—In infected plants, small, light-yellow spore pustules of the fungus Phragmidium ruhi-idaei appear on young leaves, and black spores form in the same pustules later in the season. On the variety Raner
RF2J617E9–image shows topw view of rose plant in garden or garden center and nursery infected with rose rust fungus Phragmidium mucronatum showing orange pustul
RF2R8R6XD–The Rose Rust Fungus caused by a fungus Phragmidium mucronatum and P. tuberculatum. Symptoms on ornamental roses in the garden.
RM2AWJ6H8–Introduction to the study of fungi : their organography, classification, and distribution for the use of collectors . th long, sometimes verylong, pedicels. In Fhragmosporae the teleutospores are three, or more,septate, in one direction. In most generathey are destitute of a pseudoperidium,whilst in Phragmidium^ (Fig- 119) andXenodochus the uredospores are solitary.The differences between these two generaare slight: in the former the teleutosporesare cylindrical, the cells not readily break-ing up into joints; in the latter the cellsare more numerous and moniliform, soonbreaking up into the co
RMPFEPNJ–. Descriptions of new species of fungi. Fungi. -5—. Fleure 2—Summer or Uredo spores of the rasp- berry rust, Phragmidium rubi-idxi. Spore clus- ter ^iirrouuded by club-shaped sterile bodies paraphyses. (After Winter.) gones are absent and the spores are borne on stalks, from which they easily fall, instead of being in chains. It is found that later in the sea- son blackish winter spores follow each of these forms and serve to propagate the disease from year to year. The one on raspberries is Phragmidium rubi-idcei (Pers.) Wint., and that on blackberries is Pharagmidium rubi (Pers.) Wint., the
RM2CGWXED–Close-up of a vividly coloured Bramble leaf with what is probably violet bramble rust caused by the fungus Phragmidium violaceum. Plant disease.
![Diseases of cultivated plants and Diseases of cultivated plants and trees diseasesofcultiv00massuoft Year: [1910?] PHRAGMIDIUM 313 dark brown, 3-8 septate, 75-100X26-30 [i, pedicel long, thickened in the middle. The infection in spring depends entirely on the presence of teleutospores present on fallen leaves, consequently all fallen leaves should be either buried by digging during the winter or by sweeping up and burning. Plants that have Fig. 92.—Plu-agmidium stibcorticatum. i, rose branch and leaves with aecidium stage of fungus ; 2, rose leaf with teleutospores ; 3, teleutospores ; 4, Stock Photo](https://c8.alamy.com/comp/T1HPN1/diseases-of-cultivated-plants-and-diseases-of-cultivated-plants-and-trees-diseasesofcultiv00massuoft-year-1910-phragmidium-313-dark-brown-3-8-septate-75-100x26-30-i-pedicel-long-thickened-in-the-middle-the-infection-in-spring-depends-entirely-on-the-presence-of-teleutospores-present-on-fallen-leaves-consequently-all-fallen-leaves-should-be-either-buried-by-digging-during-the-winter-or-by-sweeping-up-and-burning-plants-that-have-fig-92plu-agmidium-stibcorticatum-i-rose-branch-and-leaves-with-aecidium-stage-of-fungus-2-rose-leaf-with-teleutospores-3-teleutospores-4-T1HPN1.jpg "Diseases of cultivated plants and Diseases of cultivated plants and trees diseasesofcultiv00massuoft Year: [1910?] PHRAGMIDIUM 313 dark brown, 3-8 septate, 75-100X26-30 [i, pedicel long, thickened in the middle. The infection in spring depends entirely on the presence of teleutospores present on fallen leaves, consequently all fallen leaves should be either buried by digging during the winter or by sweeping up and burning. Plants that have Fig. 92.—Plu-agmidium stibcorticatum. i, rose branch and leaves with aecidium stage of fungus ; 2, rose leaf with teleutospores ; 3, teleutospores ; 4, Stock Photo")
RMT1HPN1–Diseases of cultivated plants and Diseases of cultivated plants and trees diseasesofcultiv00massuoft Year: [1910?] PHRAGMIDIUM 313 dark brown, 3-8 septate, 75-100X26-30 [i, pedicel long, thickened in the middle. The infection in spring depends entirely on the presence of teleutospores present on fallen leaves, consequently all fallen leaves should be either buried by digging during the winter or by sweeping up and burning. Plants that have Fig. 92.—Plu-agmidium stibcorticatum. i, rose branch and leaves with aecidium stage of fungus ; 2, rose leaf with teleutospores ; 3, teleutospores ; 4,
RMMCK5AT–. Fig. 194.—Pkrarjiuidhmi subcorliduni on a Rose leaf. The black spots are teleutospore-patches on the under- surface of the leaf. (v. Tubeuf del.) Fig. 103.—Triphragmitim ulmariae on Spiraea Ubnaria. Germinating teleuto- spore, with proniycelia and sporidia. (After Tulasue.) teleutospores are produced in loose patches. The aecidial patches have no covering, but are surrounded by club-shaped paraphyses. The genus frequents only Rosaceae. On species of Hosa: ^ Phragmidium subcorticium (Schrank.). Teleutospores, uredospores, and aecidia on leaves of wild and cultivated roses. (Britain and U.S. A
RF2R8R6H0–The Rose Rust Fungus caused by a fungus Phragmidium mucronatum and P. tuberculatum. Symptoms on ornamental roses in the garden.
RM2AN2YWT–Fungi, Ascomycetes, Ustilaginales, Uredinales . Fig- 77- PucciniaFalcariae; branchedfertile cell of aecidium or primaryuredosorus, x 1200: after Dittschlag. Fig. 1 ;*. Phragmidium Potcntillae-CanadensisDiet.; a. conjugation; /. branched fertilecell; after Christman. 204 PROTOBASIDIOMYCETES [CH. But the fact that these sori are developed on the same mycelium as thespermogonia, the fact that in their fertile cells nuclear association takesplace and the fact that in the formation of the fertile cell a sterile cell is cutoff, all suggest that the true homology is with the aecidium. The mycelium fo
RMPG3NK9–. Fungous diseases of plants : with chapters on physiology, culture methods and technique . Fungi in agriculture. Fig. 210. Phragmidium subcorticium a and d, caeoma and teleuto stages on rose ; b: c, and e, spore forms usually in small black groups. A teleutospore is more or less spindle-shaped, usually six to eight cells in extent (Fig. 210, e), and each cell is provided with several germ pores. The outer wall of the spore is generally uneven or warty toward the apex, and there is a distinct terminal papilla. The teleutospores measure 65-100 x 30-45 x without the pedicel. The pedicel is pers
RM2CGWX6C–Close-up of a vividly coloured Bramble leaf with what is probably violet bramble rust caused by the fungus Phragmidium violaceum. Plant disease.
RMT1JFCG–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 362 UREDINEAE. points. The so-called aecidia are really a form of uredo-sori; they occur as thick cushions and cause thickening or twisting of the leaves and petioles. T. filipendulae (Lascli.) (Britain). On Spiraea Filipendula. T. echinatum Lev. occurs on Meum ; teleutospores alone are known (U.S. AnuTica). T. clavellosum Beik. On leaves of Aralia in the United States. Phragmidium. Teleutospores mul
RM2JXP2XF–Close-up of a vividly coloured Bramble leaves with what is probably violet bramble rust caused by the fungus Phragmidium violaceum. Plant disease.
RMMCK642–. Fig. 194.—Phrdf/riiidhim sitbcortichim on a Rose leaf. The black spots are teleutospore-patches on the under- surface of the leaf. (v. Tubeuf del.) Fl(j. 103.— TriphragnuuM ulmnriae on Spiraea Uhiutna. Germinating teleuto- spore, with proniycclia and sporidia. (After Tulasne.) teleutospores are produced in loose patches. The aecidial patches have no covering, but are surrounded by club-shaped paraphyses. The genus frequents only Eosaceae. On species of Bosa:'^ Phragmidium subcorticium (Schr'ank.). Teleutospores, uredospores, and aecidia on leaves of wild and cultivated roses. (Britain and U.
RF2R8R70X–The Rose Rust Fungus caused by a fungus Phragmidium mucronatum and P. tuberculatum. Symptoms on ornamental roses in the garden.
RM2AN2RHG–Fungi, Ascomycetes, Ustilaginales, Uredinales . Fig. 190. Gymnosporangium clavariaeforme Reesfirst division in basidium, x [460; after Blackman.. 214 PROTOBASIDIOMYCETES [CH. fertile cells of Phragmidium violaceum was shown by Blackman and subse-quently by Welsford to be derived from one of the smaller cells at the baseof the fertile layer. It is thus a vegetative nucleus; it enters the fertile cellby migrating through the wall, becoming much drawn out and laterally com-pressed. It leaves a pore which maybe identified after its passage (fig. 192).
RF2RAXNE1–Rose rust fungus (Phragmidium mucronatum). Common plant pathogen evident as bright orange pustules on budding stalk of dog rose.
RF2WR0FJR–Rose rust, Phragmidium mucronatum, pustules (urediospores, teliospores) formed on the lower leaf surface of an ornamental rose tree in summer.
RMPG461P–. The fungi which cause plant disease . Plant diseases; Fungi. 358 THE FUNGI WHICH CAUSE PLANT DISEASE Triphragmium Link (p. 354) Teliospores 3-celled, one basal, two apical, each cell vnth one or more germ tubes. T. ulmarise Schm. occurs on Ulmaria in England and at one station in America. Phragmidium Link (p. 354) 0. Pycnia present. 1. iEciospores in basipetal chains. The first two spore forms. 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
RMT3WJFD–Archive image from page 62 of Die Natürlichen Pflanzenfamilien nebst ihren. Die Natürlichen Pflanzenfamilien nebst ihren Gattungen und wichtigeren Arten, insbesondere den Nutzpflanzen, unter Mitwirkung zahlreicher hervorragender Fachgelehrten begründet dienatrlichenp11engl Year: 1900 üredinales, (Dietel.) 49 * Endospor der Teleulosporen in eine dunkelbraune Innenschiclit und eine in Wasser stark quellende Außenschicht differenziert 8. Phragmopjrsis. ** Endospor ohne stark quellende Außenschicht; nur auf Rosaceen lebende Arten 9. Phragmidium. 2. Sporenzellen nicht in Längsreihen. * Sporenzell
RMMCK6H9–. Fig. 194.—Phrut/midium subcorticium on a Rose leaf. The black spots are teleutospore-patches on the uuder- sm-face of the leaf. (v. Tubeuf del.) Fig. 103.—Triphragnuv.m v.lmarine on S/>iiv«rt Ulmaria. Germinating teleuto- spore, with promycelia and sporidia. (After Tulasne.) teleutospores are produced in loose patches. The aecidial patches have no covering, but are surrounded by club-shaped paraphyses. The genus frequents only Eosaceae. On species of Rosa: ^ Phragmidium subcorticium (Schrank.). Teleutospores, uredospores, and aecidia mi leaves of wild and cultivated roses. (Bi'itaiu and U
RM2ANBHEC–A text-book of mycology and plant pathology . Fig. 77.—Longitudinal section of a partlygelatinous teliosorusafter the exten-sion of the tentacles. (After Reed, H. S., and Crabill, C. H., Techn. Bull. 9, Va.Agric. Exper. Slat., May, 1915.) 208 MYCOLOGY Belonging to the genus Gymnoconia (Fig. 92) is the orange rustof raspberry and blackberry which is found throughout the UnitedStates and Canada. It is also widely distributed in Europe and Asia. The genus Phragmidium, which is confined entirely to plants of therose family, is autoecious. Warts are formed on the teliospores by thecontraction of an
RF2WR0FJW–Rose rust, Phragmidium mucronatum, pustules (urediospores, teliospores) formed on the lower leaf surface of an ornamental rose tree in summer.
RMPG4520–. A text-book of mycology and plant pathology . Plant diseases; Fungi in agriculture; Plant diseases; Fungi. Fig. 66.—A, Chain of young asciospores of Puccinia caricis; a, fusion tissue; b, basal (fusion) cell with conjugate nuclei; t, seciospore mother-cell; d, intercalary cell; e, young seciospore; B, germinating aeciospore of P. caricis; C, teliospore of P. caricis; D, formation of teliospores of P. falcarice (after Ditlscklag); E, development of aecium (after Blackman) of Phragmidium violaceum; e, epidermal cell; i, sterile cell; below these cells a nucleus is seen migrating into the adjac
RMT3XCCB–Archive image from page 164 of Die Pilze Böhmens (1908). Die Pilze Böhmens diepilzebhmens00bubuoft Year: 1908 161 Oattiitigen. 1. Teleutüsporen drei- bis vielzellig, Zellen kettenföniiiu verbunden l'/irtu/midium. i. Teleutosporen dreizelli;', Zellen in Form eines Dieiet'kes verbunden l'ripltracimhim. Abl>. H4. Keimende Teleutosporen von 1. Phragmidium Ihibi. •2. von Triphraf/mium Ulmaiiae. (Nach Tulasne.) 1. Phragmidium Link. Spermogonien Hacli, von der Epidermis bedeckt. Aecidien ohne Pseudoperidien, vom Caeoma-Typus, aussen gewöhnlieli von einem Kranze nach innen gebogener Parafysen
RMMCKCAR–. Fig. 92.—Plu-agmidium stibcorticatum. i, rose branch and leaves with aecidium stage of fungus ; 2, rose leaf with teleutospores ; 3, teleutospores ; 4, uredospores. Figs, i and 2 nat. size, remainder highly mag. been attacked should be drenched with a solution of sulphate of copper during the winter. Raspberry rust {Phragmidium rubi-idaei, Winter) pro- duces its three stages on the raspberry plant. The aecidium condition appears first on the upper surface of the leaves in the month of June, under the form of greenish-yellow pustules, usually arranged in broken circles. The uredo stage appear
RM2AN2XBC–Fungi, Ascomycetes, Ustilaginales, Uredinales . Fig. 180. a. Phragmidium Kuln Pers.; teleutosorus, x 240: after Sappin-Trouffy; b. Pkragmidiumviolaceum Wint.; teleutosorus, 240; after Blackmail. except in the genus Uredinopsis, on ferns, where they are scattered. Like theuredospores the teleutospores are with or without paraphyses and like themarise from rectangular basal cells. They appear as narrow binucleateoutgrowths in which one or more divisions take place so that, in themajority of cases, a stalk is formed below and the simple or compoundteleutospore is produced above (fig. 181). The st
RMMCR8X4–. Abl>. H4. Keimende Teleutosporen von 1. Phragmidium Ihibi. •2. von Triphraf/mium Ulmaiiae. (Nach Tulasne.) 1. Phragmidium Link. Spermogonien Hacli, von der Epidermis bedeckt. Aecidien ohne Pseudoperidien, vom Caeoma-Typus, aussen gewöhnlieli von einem Kranze nach innen gebogener Parafysen umgeben; Sporen in kurzen Ketten, manchmal mit deutlichen interkalaren Zellen, gewöhnlich mit 6—8 Keimporen. Uredosporen gestielt, mit 6 — 8 Keimporen, mit Parafysen wie Caeoma. Teleutosporen dreizellig bis vielzellig, Zellen kettenförmig verbunden, seltener 1—2zellig. Sporidien kuglig. (Siehe Abb. 34, 1
RM2AN2Y4R–Fungi, Ascomycetes, Ustilaginales, Uredinales . Fig- >79- • Phragmidium Rubi Pers.; uredosorus, x6oo; after Sappin-Trouffy; b. Phragmidiumviolaceum Wint.; uredosorus, X480; after Blackman. by paraphyses, or in certain genera (Pucciniastrum, UrcJinopsis) by a pseudo-peridium. In the young sorus a regular layer of somewhat rectangular basalcells is formed, from which the uredospore mother-cells arise. In Colco-sporitim, in Chrysomyxa, and in the secondary caeomata of Phragmidiumsubcorlicium, they are produced in vertical rows like the typical aecidiosporemother-cells and divide to form uredos
RMME833E–. Die krankheiten der pflanzen, ein handbuch fur land-und forstwirte, gartner, gartenfreunde und botaniker . m- 31. S)urd)fd)iiitt bmd) eine SlatifteKe tion Rosa canina mit einem Caeoma (5(cibien-;uflanb) öoii Phragmidium tuberculatum. A ba§ Caeoma-Sciger mit ben fetteuförmig übereinauberfte()enben (Sporen sp; umranbet oon bem Äranje öon 5ßaraplji)fen p; jnr Seite greift ba§: ^^ßü^lager z, Uüd) lueiter nuten bie (Spibermi§, bie bei e bnrd) ba§ SporcnUnjcr anfgebrocfien lucrben ift. SS Spormogonicn a ber anberu Seite besi 33lattcö. 70fad) nergröBeut. Sarunter eine Caeoraa-Spore ftarf uergröB
RMEXH0N8–Rose rust , Phragmidium mucronatum, pustules (urediospores, teliospores) formed on the lower leaf surface of an ornamental rose
![Fungi, Ascomycetes, Ustilaginales, Uredinales . Fig. 164. Germinating teleutospores ; a. Phragmidium bulbosum Schm.; b. Triphragmidium UlmariaeLk.; c. Colcosporitim Sonchi Lev.; d. Uromy es appendiculatus (Fabae) Lev.; after Tulasne. (II. VIII] IRKIMXALKS ?97 of the spore forms other than tlie teleutospore, such as Aecidium, Caeomaand Uredo, still survive in our nomenclature. The teleutospores (figs. 164, 165, 166) may be unicellular or they maybe made up of two or more cells forming a compound structure, each cell of. Fig 165. Cronartiumepiadeum Fr. ; te-leutospore mass withbasiclia and spore Stock Photo](https://c8.alamy.com/comp/2AN32KN/fungi-ascomycetes-ustilaginales-uredinales-fig-164-germinating-teleutospores-a-phragmidium-bulbosum-schm-b-triphragmidium-ulmariaelk-c-colcosporitim-sonchi-lev-d-uromy-es-appendiculatus-fabae-lev-after-tulasne-ii-viii-irkimxalks-97-of-the-spore-forms-other-than-tlie-teleutospore-such-as-aecidium-caeomaand-uredo-still-survive-in-our-nomenclature-the-teleutospores-figs-164-165-166-may-be-unicellular-or-they-maybe-made-up-of-two-or-more-cells-forming-a-compound-structure-each-cell-of-fig-165-cronartiumepiadeum-fr-te-leutospore-mass-withbasiclia-and-spore-2AN32KN.jpg "Fungi, Ascomycetes, Ustilaginales, Uredinales . Fig. 164. Germinating teleutospores ; a. Phragmidium bulbosum Schm.; b. Triphragmidium UlmariaeLk.; c. Colcosporitim Sonchi Lev.; d. Uromy es appendiculatus (Fabae) Lev.; after Tulasne. (II. VIII] IRKIMXALKS ?97 of the spore forms other than tlie teleutospore, such as Aecidium, Caeomaand Uredo, still survive in our nomenclature. The teleutospores (figs. 164, 165, 166) may be unicellular or they maybe made up of two or more cells forming a compound structure, each cell of. Fig 165. Cronartiumepiadeum Fr. ; te-leutospore mass withbasiclia and spore Stock Photo")
RM2AN32KN–Fungi, Ascomycetes, Ustilaginales, Uredinales . Fig. 164. Germinating teleutospores ; a. Phragmidium bulbosum Schm.; b. Triphragmidium UlmariaeLk.; c. Colcosporitim Sonchi Lev.; d. Uromy es appendiculatus (Fabae) Lev.; after Tulasne. (II. VIII] IRKIMXALKS ?97 of the spore forms other than tlie teleutospore, such as Aecidium, Caeomaand Uredo, still survive in our nomenclature. The teleutospores (figs. 164, 165, 166) may be unicellular or they maybe made up of two or more cells forming a compound structure, each cell of. Fig 165. Cronartiumepiadeum Fr. ; te-leutospore mass withbasiclia and spore
RMEXH0N7–Rose rust , Phragmidium mucronatum, pustules (urediospores, teliospores) formed on the lower leaf surface of an ornamental rose
RMEFHJFY–Blackberry rust, Phragmidium violaceum, lesions on the upper leaf surface of blackberry or bramble leaves, Berkshire, August
RM2AKMB4H–Transactions of the Natural History Society of Northumberland, Durham, and Newcastle-upon-Tyne . or. Rumex acetosa •. teleuto-and uredosporeson Phfagmitis vulgaris. 9. Puccinia magnusiana, Koern. Common in Mill Lane,Norton. Aecidia on Ranunculus repens. Phragmidium, Link.I. Phragniidiuin fragariustri, Schr. Sometimes veryinjurious to Poterium officinale at Billingham. Coleosporium, Lev. 1. Coleosporium sonchi, Lev. Extremely common on thePetasites vulgaris lining Greatham Beck but absent fromBillingham. 2. Coleosporium euplirasiae, Wint. On Rhinanthus crisla-gal ii m Cowpen Marsh. Triphragmiu
RMEFHJFX–Blackberry rust, Phragmidium violaceum, lesions on the upper leaf surface of blackberry or bramble leaves, Berkshire, August
RM2AN2PNR–Fungi, Ascomycetes, Ustilaginales, Uredinales . eoma; sterile cell pushing up betweenepidermal cells of host, x 1.500; afterBlackman. Fig-9S- Phragmidium speciosum Fr.;fertile cells after conjugation; aecidio- spore mother-cell above ; after Christ-man. takes place and aecidiospore mother-cells arc cut off so that a single rowof aecidiospores is developed from each pair of gametes. Christman regardsthe fertile cells as isogametes between which conjugation takes place, andthe sterile cells merely as buffers, of which the function is to assist in therupture of the epidermis. His observations on
RMEXH0N5–Rose rust , Phragmidium mucronatum, lesions and chlorosis formed on the upper leaf surface of an ornamental rose tree in summer,
RM2AWKMWW–Bush-fruits; a horticultural monograph of raspberries, blackberries, dewberries, currants, gooseberries, and other shrub-like fruits . te that it might become so. Its position onthe under side of the leaves would render it diflScult to combat. Phragmidium Eubi-idcei (Pers.) Karst. For synonymy, see Saccardo, Syll. Fung. 7: 748. Winter, Die Filze, 1: 231.Burrill, Par. Fung. 111. 207. On leaves, petioles and peduncles of Euhus Idceus, E. strigosus,E. odoratus, E. parvijlorus, E. occidentalis, and E. cuneifoUus. This is closely related to the preceding species, and is the samein outward appearanc
RM2ANBX7F–A text-book of mycology and plant pathology . cium {after Blackman) of Phragmidium violaceiim; e, epidermal cell; s, sterilecell; below these cells a nucleus is seen migrating into the adjacent cell/; F and G,conjugation of two female cells to form basal cell of asciospore chain {after Dittschlog).In G the first conjugate division is just completed. {Adapted from Grove, BritishRust Fungi.) as soon as it is formed, cuts off by conjugate division a small cell below,called the intercalary cell; this soon disorganizes and disappears, whilethe other portion remains as the aeciospore. The succeeding
RM2AJ519F–Fungous diseases of plants . nt. Bandi, W. Beitrage zur Biologic der Uredineen (Teil I). Hedwigia 42:118-136. 1903. The various species of Phragmidium are parasitic upon differentrosaceous hosts. No species of these rusts produces any veryserious disease of a cultivated variety ; nevertheless, considerationshould be given to a general study of one member of this genus.The fungus above indicated occurs commonly in moist regionsupon several wild roses. Spermogonia and aecidia (caeoma type)arc produced on the stems, petioles, leaf veins, etc., as orange-red pustules, sometimes inclosed by paraphy
RM2AJ515T–Fungous diseases of plants . Fig. 210. Phragmidium suBcoRTiciuMa and </, caeoma and teleuto stages on rose ; /, c, and e^ spore forms usually in small black groups. A teleutospore is more or lessspindle-shaped, usually six to eight cells in extent (Fig. 210, c), andeach cell is provided with several germ pores. The outer wall ofthe spore is generally uneven or warty toward the apex, andthere is a distinct terminal papilla. The teleutospores measure65-100 X 30-45 /A without the pedicel. The pedicel is persistent,swollen at the base, and about as long as the spore. The cells ofthe teleutospor
RM2ANBH7K–A text-book of mycology and plant pathology . H. S., and Crabill,C. H., Techn. Bull. 9, Va. Agric. Exper. Stat., May, 191S) midium from neighboring genera. The teliospores are two- to several-celled by transverse septa. An important species is the Rust of Roses,Phragmidium subcorlicium, which has a spindle-shaped teliospore withsix to eight cells. Gymnosporangium is a genus of heteroecious rusts the aecia of whichoccur on Rosacea (except one on Hydrangeac^ and one on Myri- RUST FUNGI 209 CACE^) while the three-, four or five-celled teliospores are foundon CupRESSiNE^ (ChaftKecyparis, Cuprcssus
RM2ANBXE0–A text-book of mycology and plant pathology . Fig. 66.—a, Chain of young seciospores of Puccinia caricis; a, fusion tissue;b, basal (fusion) cell with conjugate nuclei; c, aeciospore mother-cell; d, intercalarycell; e, young aeciospore; B, germinating aeciospore of P. caricis; C, teliospore of P.caricis; D, formation of teliospores of P. falcaria {after Ditlschlag); E, developmentof aecium {after Blackman) of Phragmidium violaceiim; e, epidermal cell; s, sterilecell; below these cells a nucleus is seen migrating into the adjacent cell/; F and G,conjugation of two female cells to form basal cel
RM2CDC07E–. Introduction to the study of fungi, their organography, classification, and distribution for the use of collectors . , with long, sometimes verylong, pedicels. In Phragmosporae the teleutospores are three, or more,septate, in one direction. In most generathey are destitute of a pseudoperidium,whilst in Phragmidium^ (Fig. 119) andXenodochus the uredospores are solitary.The differences between these two generaare slight: in the former the teleutosporesare cylindrical, the cells not readily break-ing up into joints; in the latter the cellsare more numerous and moniliform, soonbreaking up into t
RM2CDD90Y–. The rusts of Australia, their structure, nature, and classification . G. H. Robinson, Phot. x 2.in - ..mi. PUCCINIA AND PHRAGMIDIUM. LORANTHACEAE AND ROSACEAE. 3° 4 Explanation of Plates. PLATE XXXII. UROMYCLADIUM.Fig. 27V Leaves of Acacia longiJolia, with the tuberculate spermogonial M>ri of Urotny-cladium maritimum ... ... ... ... ... Dat. size 274. Leaves of Acacia melanoxylon, the upper with tuberculate spermogonial sori, and the lower with minute pulverulent sori, both of U. robinsoni. ... nat. size 1 275. Leaf of Acacia fycnantha, with the minute powdery sori of U. simplex, oat. si
RM2CDD9AJ–. The rusts of Australia, their structure, nature, and classification . G. H. Robinson, Phot. X 250 & 500. UROMYCES PHYLLODIORUM. LEGUMINOSAE-ACACIA. 292 Explanation of Plates. PLATE XXVI. (All Figures X 250 mil ess otherivise stated.) PHRAGMIDIUM, MELAMPSOR V Fig. 229. Aecidiospores of Phr. subcorticiitm on Rosa rubignosa. 230. Uredospores of same. 231. 232. Teleutospores of same. 233. Twig of Rosa rubiginosa, the uppermost shoot of which is swollen and dis- torted bv the aecidia of Phr. subcorticium. ... ... ... nat. size 234, 23s. Teleutospores and uredospore of P. barnardi on Rubus parvifa
RM2CDCATD–. Fungous diseases of plants, with chapters on physiology, culture methods and technique . Wint. Bandi, W. Beitrage zur Biologic der Uredineen (Teil I). Hedvvigia 42 :118-136. 1903. The various species of Phragmidium are parasitic upon differentrosaceous hosts. No species of these rusts produces any veryserious disease of a cultivated variety; nevertheless, considerationshould be given to a general study of one member of this genus.The fungus above indicated occurs commonly in moist regionsupon several wild roses. Spermogonia and aecidia (caeoma type)are produced on the stems, petioles, leaf v
RM2CDD90B–. The rusts of Australia, their structure, nature, and classification . ,•-? o oc (#* o .« !? esa w m v . ^ PUCCINIA AND UREDO. 302 Explanation of Plats. PLATE XXXI. {All Figures X 250 unless otherwise stated.) ADDENDA to PUCCINIA and PHRAGMIDIUM.Fig.26S. Leaf of Loranthus celastroides, showing uredosori and teleutosori of Puccinia loranthicola ... ... ... ... ... ... ... nat. size 269. Teleutospores from same. 270. Uredospores from s;.me. 271. Leaf of Loranthus celastroides, with aecidia of same ... ... nat. size 2-2. Teleutospores of Phragmidiitm longissimum. a. Four and five celled spores,
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
RM2CDDAXP–. The rusts of Australia, their structure, nature, and classification . SET r^V^r^ MANGEL RUST. ?$& Explanation of Plates. PLATE I. (All Figures nat. size.) MELAMPSORA LINI ON NATIVE FLAX (Linum ma*ginale).Fig. 36. Uredo and teleutosori on stem. PHRAGMIDIUM SUBCORTIC1UM on SWEET-BRIER (Rosa rubiginosa). 37. Aecidia (Caeomata) showing large swollen patches on stems and small patches on lower surface of leaves. PHRAGMIDIUM BARNARDI ON NATIVE RASPBERRY (Rubus parvifolius). 38. Ochraceous uredosori on lower surface of leaves and flower-stalks, powdery teleutosori accompanying uredosori. PLATE I..
RM2CDF04D–. Allgemeine Pflanzenkaryologie . Fig. 333. Phragmidium violaceum. Zutritt eines „somatischen Kernes zu einer 9Gamete. Vergr. 1350. (Nach Blackman.) Potenüllae canadensis und Puccinia Podophylli^), nach E. W. Oliate(1908) bei P. transformans, nach Mad. Moreau (1914 c) bei P. Malva-cearum, P. Biixi und Uromyces Ficariae (s. a. Maire 1911, S. 116). Endlich ist anscheinend auch der dritte Typus verwirklicht, d. h. Ver-schmelzung des Kerns einer 9 Zelle mit einem vegetativen Kern. Black-man (1904, Fig. 333) beschrieb ihn als erster für Phragmidium violaceum,Blackman und Fräser (1906) bestätigten i
RMRH1JHX–. The British rust fungi (Uredinales), their biology and classification. Uredineae. 14 GERMINATION OF TELEUTOSPORES Germination of the Teleutospore. We now approach the consideration of a process which has been in the past much discussed, and upon the right inter- pretation of which the whole question of the systematic position of the Uredinales depends. Each cell of the teleutospore of P. Caricis has one germ-pore, though some genera allied to Puccinia have teleutospores with more than one germ-pore to each cell, e.g. Phragmidium, Uropyxis, Calliospora. The germ- pore of the upper cell is in
RMRE38D2–. The British rust fungi (Uredinales) their biology and classification. Rust fungi. 14 GERMINATION OF TELEUTOSPOEES Germination of the Teleutospore. We now approach the consideration of a process which has been in the past much discussed, and upon the right inter- pretation of which the whole question of the systematic position of the Uredinales depends. Each cell of the teleutospore of P. Caricis has one germ-pore, though some genera alhed to Puccinia have teleutospores with more than one germ-pore to each cell, e.g. Phragmidium, JJropyods, Calliospora. The germ- pore of the upper cell is in
![. 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
RMRDHTEC–. Fungi; their nature and uses. Fungi. STRUCTURE. 39 Fia. ).—XenodocJtua car bonarius. yellow Uredine, of which it is a condition. Probably, in every species of the Puccinicei, it may hereafter be proved, as it is now suspected, that an unicellular Uredine precedes or is associated with it, forming a condition, or secondary form of fruit of that species. Many instances of that kind have already been traced by De Bary,* Tulasne, and others, and some have been a little too rashly surmised by their followers. In Phragmidium, the pedicel is much more elongated than in Xenodochus, and the spore is
RMRE3724–. The British rust fungi (Uredinales) their biology and classification. Rust fungi. PHRAGMIDIUM 291 The uredospores of this species are distinguished from those of its allies by being densely and rather coarsely verruculose and very similar to the cseoma-spores, from which, in fact, they differ almost solely in being abstricted singly and not in chains. The oseoma-stage is one of the earliest Uredines of spring, showing on the leaves as soon as they are well developed, and extending even to the calyx. The teleutospores are entirely devoid of papilla on the apical cell ; the gelatinous outer co
RMRDX0FN–. Fungi, ascomycetes, ustilaginales, uredinales. Fungi. 214 PROTOBASIDIOMYCETES [CH. fertile cells of Phragmidium violacetun was shown by Blackman and subse- quently by Welsford to be derived from one of the smaller cells at the base of the fertile layer. It is thus a vegetative nucleus; it enters the fertile cell by migrating through the wall, becoming much drawn out and laterally com- pressed. It leaves a pore which may be identified after its passage (fig. 192).. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - colo
RMRDHED5–. The elements of botany embracing organography, histology, vegetable physiology, systematic botany and economic botany ... together with a complete glossary of botanical terms. Botany. 144 SYSTEMATIC BOTANY. Pig. 260), or many-celled (as in Phragmidium). They rupture the epidermis and become exposed, but generally remain attached to their host-plant during the winter. In the spring, they germinate by sending out from each cell a jointed filament, called the promycelium. In small branches of the promycelium, small terminal cells, or sporidia, are formed. These are carried about by the wind, an
RMRE3816–. The British rust fungi (Uredinales) their biology and classification. Rust fungi. ON COMPOSITE 129 This genils occupies an intermediate position between Uromyces and the less advanced genera, Phragmidium, etc., as is shown by the fact that many species tend to form one-celled teleutospores (mesospores) indistinguishable from those of Uromyces, while others have spores with three or more cells, arranged as in Phragmidium, Triphragmium, Sphaerophrag- mium, etc. The number of species is enormous, more than 1300 are already known. The genus must therefore be subdivided, but no quite satisfactory
RMRH2T9F–. The British rust fungi (Uredinales) their biology and classification. Rust fungi -- Great Britain. PHRAGMIDIUM 291 The uredospores of this species are distinguished from those of its allies by being densely and rather coarsely verruculose and very similar to the Cccoma-spores, from which, in fact, they differ almost solely in being abstricted singly and not in chains. The cseorna-stage is one of the earliest Uredines of spring, showing on the leaves as soon as they are well developed, and extending even to the calyx. The teleutospores are entirely devoid of papilla on the apical cell ; the g
RMRE0NH7–. The elements of botany embracing organography, histology, vegetable physiology, systematic botany and economic botany ... together with a complete glossary of botanical terms. Botany. 144 SYSTEMATIC BOTANY. Fig. 260), or many-celled (as in Phragmidium). They rupture the epidermis and become exposed, but generally remain attached to their host-plant during the winter. lu the spring, they germinate by sending out from each cell a jointed filament, called the promycelium. In small branches of the promycelium, small terminal cells, or sporidia, are formed. These are carried about by the wind, an
![. The British rust fungi (Uredinales) their biology and classification. Rust fungi -- Great Britain. 14 GERMINATION OF TELEUTosi'ultKs Ckhmixation of the Teleutospoee. We ii" approach the consideratioD of a process which has been in the past much discussed, and upon the right inter- pretation of which the whole question of the systemal ic p« >>ition of the l/redinales depends. Kadi cell of tin- teleutospore of P. Caricis has one germ-pore, though some genera allied to Puccinia have toleutospores with more than one germ-pore to each cell, e.g. Phragmidium, Uropyads, Calliospora. Th Stock Photo](https://c8.alamy.com/comp/RH28TK/the-british-rust-fungi-uredinales-their-biology-and-classification-rust-fungi-great-britain-14-germination-of-teleutosiultks-ckhmixation-of-the-teleutospoee-we-iiquot-approach-the-consideratiod-of-a-process-which-has-been-in-the-past-much-discussed-and-upon-the-right-inter-pretation-of-which-the-whole-question-of-the-systemal-ic-p-gtgtition-of-the-lredinales-depends-kadi-cell-of-tin-teleutospore-of-p-caricis-has-one-germ-pore-though-some-genera-allied-to-puccinia-have-toleutospores-with-more-than-one-germ-pore-to-each-cell-eg-phragmidium-uropyads-calliospora-th-RH28TK.jpg ". The British rust fungi (Uredinales) their biology and classification. Rust fungi -- Great Britain. 14 GERMINATION OF TELEUTosi'ultKs Ckhmixation of the Teleutospoee. We ii" approach the consideratioD of a process which has been in the past much discussed, and upon the right inter- pretation of which the whole question of the systemal ic p« >>ition of the l/redinales depends. Kadi cell of tin- teleutospore of P. Caricis has one germ-pore, though some genera allied to Puccinia have toleutospores with more than one germ-pore to each cell, e.g. Phragmidium, Uropyads, Calliospora. Th Stock Photo")
RMRH28TK–. The British rust fungi (Uredinales) their biology and classification. Rust fungi -- Great Britain. 14 GERMINATION OF TELEUTosi'ultKs Ckhmixation of the Teleutospoee. We ii" approach the consideratioD of a process which has been in the past much discussed, and upon the right inter- pretation of which the whole question of the systemal ic p« >>ition of the l/redinales depends. Kadi cell of tin- teleutospore of P. Caricis has one germ-pore, though some genera allied to Puccinia have toleutospores with more than one germ-pore to each cell, e.g. Phragmidium, Uropyads, Calliospora. Th
RMRDE2AK–. A text-book of mycology and plant pathology . Plant diseases; Fungi in agriculture; Plant diseases; Fungi. 208 MYCOLOGY Belonging to the genus Gymnoconia (Fig. 92) is the orange rust of raspberry and blackberry which is found throughout the United States and Canada. It is also widely distributed in Europe and Asia. The genus Phragmidium, which is confined entirely to plants of the rose family, is autcecious. Warts are formed on the teliospores by the contraction of an outer gelatinous layer which with a rigid middle lamina and the arrangement of the germ pores distinguishes Phrag-. Fig. 78.—
![. The British rust fungi (Uredinales) their biology and classification. Rust fungi. 300 KUEHNEOLA several cells as in Phragmidium, but the wall is faintly coloured or colourless, and smooth; pores one in each cell, apical. This genas is not confined to Rosacese, being recorded on Malvaceae in America, where also both the British species are found. It is not closely allied to Phragmidium: the wall of the teleutospores and the germ-pores are quite different. But I" am also of the opinion that the two species included here are not in reality congeneric. 1. Kuehneola albida Magnus. Uredo Midl Stock Photo](https://c8.alamy.com/comp/RE370G/the-british-rust-fungi-uredinales-their-biology-and-classification-rust-fungi-300-kuehneola-several-cells-as-in-phragmidium-but-the-wall-is-faintly-coloured-or-colourless-and-smooth-pores-one-in-each-cell-apical-this-genas-is-not-confined-to-rosacese-being-recorded-on-malvaceae-in-america-where-also-both-the-british-species-are-found-it-is-not-closely-allied-to-phragmidium-the-wall-of-the-teleutospores-and-the-germ-pores-are-quite-different-but-iquot-am-also-of-the-opinion-that-the-two-species-included-here-are-not-in-reality-congeneric-1-kuehneola-albida-magnus-uredo-midl-RE370G.jpg ". The British rust fungi (Uredinales) their biology and classification. Rust fungi. 300 KUEHNEOLA several cells as in Phragmidium, but the wall is faintly coloured or colourless, and smooth; pores one in each cell, apical. This genas is not confined to Rosacese, being recorded on Malvaceae in America, where also both the British species are found. It is not closely allied to Phragmidium: the wall of the teleutospores and the germ-pores are quite different. But I" am also of the opinion that the two species included here are not in reality congeneric. 1. Kuehneola albida Magnus. Uredo Midl Stock Photo")
RMRE370G–. The British rust fungi (Uredinales) their biology and classification. Rust fungi. 300 KUEHNEOLA several cells as in Phragmidium, but the wall is faintly coloured or colourless, and smooth; pores one in each cell, apical. This genas is not confined to Rosacese, being recorded on Malvaceae in America, where also both the British species are found. It is not closely allied to Phragmidium: the wall of the teleutospores and the germ-pores are quite different. But I" am also of the opinion that the two species included here are not in reality congeneric. 1. Kuehneola albida Magnus. Uredo Midl
RMRH2T6F–. The British rust fungi (Uredinales) their biology and classification. Rust fungi -- Great Britain. :><) KUEHNEOLA several cells as in Phragmidium, but the wall is faintly coloured or colourless, and smooth : pores one in each cell, apical. This genus is qoI confined t Rosacea-, being recorded on Malvaceae in America, where also lioth the Rritish species are found. It is not closely allied to Phragmidium: the wall of the teleutospores and the germ-pores are quite different. But I am also of the opinion that the two species included here are not in reality congeneric. 1. Kuehneola albida
RMRE1GJ3–. Fungi; their nature, influence, and uses;. Fungi. Fig. 58.— Pseudospores of Thecaphora hyatina. Fig. 59.—Pseudospores of Puccinia. Fig. 60.—Pseudosjjores of Tri^Uragmium. In the Puccinitsi the distinctiye features of the genera are based upon the more or less complex nature of the pseudospores, which. Fig. 61.—Pseudospores of Phragmidium. butbosuiii. Fig. 62.—Melampaora salicina. (Winter fruit.) are bilocular in Puccinia, trilocular in TripJiragmium, multilocular in Phragmidium, &c. In the curious genus Podisoma the septate. Please note that these images are extracted from scanned page i
RMRDX0EF–. Fungi, ascomycetes, ustilaginales, uredinales. Fungi. 2l6 PROTOBASIDIOMYCETES [CH.. Fig. 196. Triphragmidium Ulmariae (Schum.) Link; primary uredosorus; condition intermediate between migra- tion and conjugation of fertile cell; after Olive. that Moreau found both processes (cell-fusion being considerably more common than migration) in the same caeoma in Phragmidium subcorticium. Since 1905 nuclear association by the fusion of fertile cells in pairs has been observed in a number of species, and seems, according to our present knowledge, to be the usual method. In the primary uredosorus of Tr
RMRDX0PE–. Fungi, ascomycetes, ustilaginales, uredinales. Fungi. Fig. 169. Gymnosporan^tt-m clavariaefornie Rees; development of spermatia, x 1185; after Blackman. simpler forms, such as Phragmidium, the spermogonium is indefinite in extent, and consists of spermatial hyphae arranged beneath the cuticle, which is perforated in the centre of the mass to form an ostiole. No regular para- physes are produced but a few spermatial hyphae may elongate and project as sterile threads (fig. 168 a). The spermatial hypha is a long, narrow cell with a central elongated nucleus. It is furnished at its free end with
RMRDHT27–. Fungi; their nature and uses. Fungi. Fig. 58.— Pseudospores of Thecaphora hyalina. Fio. 59.—Pseudospores of Puccinia. Fig. 60.—Pseudospores of Triphragmium. In the Puccinicsi the distinctive features of the genera are based upon the more or less complex nature of the pseudospores, which. Fio. 61.—Pseudospores of Phragmidium bulbosum. Fig. 62.—Melampsora salicina. (Winter fruit.) are bilocular in Puccinia, trilocular in Triphragmium, multilocular in Phragmidium, &c. In the curious genus Podisoma the septate. Please note that these images are extracted from scanned page images that may hav
RMRG6PAH–. Bush-fruits. Berries; Fruit-culture. 258 Bush-Fruits by the amount of leaf-tissue which is destroyed. Attempts to con- trol the trouble by spraying seem thus far not to have given results of much promise. LEAF-RUSTS Two species of Phragmidium, one on blackberries, the other on raspberries, are prevalent and sometimes abundant, though seldom considered injurious. They are found on the under side of the leaves and would be difficult to combat. Blackberries are sometimes at- tacked also by late rust which, as its name implies, appears late in the season. It is caused by the fungus Kuehneola uri
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