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RM2AWJ77C–Introduction to the study of fungi : their organography, classification, and distribution for the use of collectors . ^ified by the large andimportant genus Puccinia, with its transversely septate teleuto-spores. The grades are like those of Uromyces, viz. spermo-gonia, aecidia, uredospores, and teleutospores; but a differentelement comes into the subsidiary grouping, since it is con-tended that in some cases these grades are not all passed uponthe same host. It is perfectly true that in one typical group.. Fig. 116.—Section of aecidia and spermogonia. S.P.C.K. that of the Auto-pucciniae, all
RMPG4B13–. Diseases of plants induced by cryptogamic parasites : introduction to the study of pathogenic Fungi, slime-Fungi, bacteria, & Algae . Plant diseases; Parasitic plants; Fungi. CHRYSOMYXA. 379 occurs on Ledum palustre. It is difficult to distinguish from the preceding species, and causes the formation of similar aecidia on spruces in Northern Germany and other parts where Bhodo- devdron is not indigenous. Its uredospores are also capable of hibernating and of propagating the fungus where spruce is absent. Chr. himalayensis Barcl. occurs on leaves of Rhododendron arboreum in the Himalaya..
RMMCK5A3–. Fig. 205.âCnh/ptottpo'a Gotppertiano. Aecidia on the under surface of needles of Silver Fir. (v. Tubeuf del.)
RMT1HWC0–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 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 each aeeidiuni. On cultivating infected plants of Crataegus indoors, I found the peridia to develop quite abnormally; they
RM2AWJ6X2–Introduction to the study of fungi : their organography, classification, and distribution for the use of collectors . ores oi Fuccinia graminis (Fig 118) may be usedto inoculate the leaves of the berberry, and produce thereonAeciclium herheridis. This is the theory and its application,which we will here leave as itstands. In another group, theBrachy - 2^ucciniae, spermogonia,uredospores, and teleutospores arefound on the same species of plant,but the aecidia are unknown. Tothis succeeds the Hemi-pticcinia,in which uredospores and teleuto-spores occm- on the same plant,but the spermogonia and a
RMPG4B10–. Diseases of plants induced by cryptogamic parasites : introduction to the study of pathogenic Fungi, slime-Fungi, bacteria, & Algae . Plant diseases; Parasitic plants; Fungi. Flu. 211.—Ckvyaomyxa rhododendri. Teleuto- spore-sorus which has ruptured the lower epi- dermis of a leaf of RkododendTon hirsutum. The teleutospores are pluricellular, and one of them has germinated, giving a promycelium with sterigmata, from which little sporidia are being abjointed. (After De Bary.). Fig. 212.—Chvysomyxa rhododendri on Spruce. The needles are beset with aecidia; discoloured parts of them are show
RMMCK6GJ–. Fig. 205.—Co.b/ptospora Goeppertiana. Aecidia on the under surface of needles of Silver Fir. (v. Tubeuf del.)
RMT1HW2W–Diseases of plants induced by Diseases of plants induced by cryptogamuc parasites; introduction to the study of pathogenic fungi, slime-fungi, bacteria, and algae. English ed. by William G. Smith diseasesofplants00tubeuoft Year: 1897 CHKYSOMYXA. 379 occurs on Ledum palustrc. It is difficult to distinguish tioni the preceding species, and causes the formation of similar aecidia on spruces in Northern Germany and other parts where BJiodo- dendran is not indigenous. Its uredospores are also capable of hiljernating and of propagating the fungus where spruce is absent. Chr. himalayensis IJarcl. o
RM2AGAE9M–. Dedication papers : scientific papers presented at the dedication of the laboratory building and plant houses, April 19-21, 1917. w gall growth, and we find the aecidia developing as innormal cases of infection with sporidia. GYMNOSPORANGIUM FRATERNUM The buffer cells in the teleutospore sori of G. fraternum are muchmore striking in appearance, forming as they do a perfectly evenpalisade layer that frequently extends entirely across the sorus withoutinterruption (Text-fig. 4). This is a very characteristic feature of ^ Sappin-Trouffy, P. Rocherches histologiques sur la famille Ics Uredinees.
RMPG4B54–. Diseases of plants induced by cryptogamic parasites : introduction to the study of pathogenic Fungi, slime-Fungi, bacteria, & Algae . Plant diseases; Parasitic plants; Fungi. 352 UREDINEAE. aecidia (Aec. parnassiae Schlecht.) on Parnassia palustris.. Spermogonial pycnidia are unknown. P. sdrpi D. C. (Britain). Uredo- and teleutospores on Scirpus; aecidia, according to Chodat, = Aec. nymphaeoides on Nymphaea, Nuphar, and Lim- nanthemmn, nymphaeoides.. Fig. 186.—Puccinia suaveolens on Cirsium arveTise. The plants ai-e abnormally slongated; the leaves have remained smaller and simpler, and
![. Fio. 205.—CulypiOKpora OoipiKAiano. Aecidia on the under surface of needles of Silver Fir. (v. Tubeuf del.) "m^^w^ Stock Photo](https://c8.alamy.com/comp/MCK63A/fio-205culypiokpora-ooipikaiano-aecidia-on-the-under-surface-of-needles-of-silver-fir-v-tubeuf-del-quotmw-MCK63A.jpg ". Fio. 205.—CulypiOKpora OoipiKAiano. Aecidia on the under surface of needles of Silver Fir. (v. Tubeuf del.) "m^^w^ Stock Photo")
RMMCK63A–. Fio. 205.—CulypiOKpora OoipiKAiano. Aecidia on the under surface of needles of Silver Fir. (v. Tubeuf del.) "m^^w^
RMT1HW2T–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 CHRYSOMYXA. 379 occurs on Ledum imludrc. It is difficult to distinguish from the preceding species, and causes the formation of similar aecidia on spruces in Northern Germany and other parts where Rhodo- dendron is not indigenous. Its uredospores are also capable of hibernating and of propagating the fungus where spruce is absent. Chr. himalayensis P.arcl. occurs on leaves of Rhododendron arhoreum in
RM2AJ50J4–Fungous diseases of plants . lation experiments to be a form known a s Pe ride rm i u macicohmt occurringon leaves of Pinusrigida in severalof the northeasternstates. The Euro-pean form occursupon branches andstems of Pinussylvcstris. The fungus. Theuredo and teleutostages are merelyconspicuous bytheir color, and inthis particular in-stance the aecidialstage is by nomeans striking.Other forms orspecies of Peri-dermium, however,may produce considerable swellings upon their hosts. According to Clinton the infection of young pine leaves maytake place in spring, the aecidia resulting the following
RMPG4B1G–. Diseases of plants induced by cryptogamic parasites : introduction to the study of pathogenic Fungi, slime-Fungi, bacteria, & Algae . Plant diseases; Parasitic plants; Fungi. 378 UREDINEAE. and small yellow pycnidia are produced during July or August. The aecidia follow from August till September, occupying yellow zones on the otherwise green needles; their white peridia project as much as 2 mm. above the surface of the needle, and dehisce by rupture of the apex. The aecidiospores are formed in large numbers and, carried by wind, reach leaves and shoots of alpine-rose where they immediat
RMMA7351–. Elementary botany . Fig. 157. Section through leaf of barberry at point affected with the cluster-cup stage of the wheat rust; spermagonia above, aecidia below. (After Marshall-Ward.) form mycelium in the tissues, and later the pustules with a second crop of uredospores. Several successive crops of uredospores may be developed in
RMT1JGY0–Diseases of plants induced by Diseases of plants induced by cryptogamuc parasites; introduction to the study of pathogenic fungi, slime-fungi, bacteria, and algae. English ed. by William G. Smith diseasesofplants00tubeuoft Year: 1897 418 UREDINEAE. Caeoma. Caeoma abietis-pectinatae Eeess. The aecidiospores may be fouiid on the lower surface of young needles of silver fir; the aecidia are yellow elongated cushions situated on either side of the needle mid-rib, and are without peridia. Pycnidia (spermogonia) are pro- duced before the aecidia. The mycelium is septate and intercellular with few
RM2AN322B–Fungi, Ascomycetes, Ustilaginales, Uredinales . eir destination by insects. The aecidia occur in groups, usually on the abaxial side of the leaf; in them the aecidiospores areproduced in basipetal rows(fig. I/O) alternating withsmall, abortive, intercalarycells, by the disintegration ofwhich they are set free. Theymay be carried to consider-able distances by the wind,and there is evidence thatthey are sometimes distri-buted by means of insects orof snails. The mature aecidio-spore is usually subgloboseor polygonal in form, it isenclosed in a thick wall per-forated byseveral germ-pores,and cont
RMPG4B5B–. Diseases of plants induced by cryptogamic parasites : introduction to the study of pathogenic Fungi, slime-Fungi, bacteria, & Algae . Plant diseases; Parasitic plants; Fungi. 350 UREDINEAE. Stems, leaf-stalks, and leaf-nervature often undergo one-sided thickening and curvature as a result of formation of aecidia. Wakker thus summarizes his observations on the anatomical changes in these malformed parts of Urtica: there is an en- largement of cells and an increase in the number of large inter- cellular spaces; no formation of coUenchyma, interfascicular cambium, and chlorophyll; a diminis
RMMCK5C1–. cortex and pith, while at the same time those of the cortical parenchyma l>ecome somewhat enlarged and altered in shape: the woody jxirlion is less developed than normally: and laticiferous tubes are neither so large nor so conspicuous as usuaL The aecidia of this species are fc»und only on ilie lower surface of the leaf: they are saucer-shaped, and have a bn»ad lobed white raanjin.
RMT1HWND–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 GYMNOSPORANGIUM. 397 the species already described in remaining closed at the apex, the spores escaping through trellis-like slits on the lateral walls of the peridia (Fig. 234). This fungus will not germinate on apple-trees, but on pears every leaf may be thickly covered with aecidia and pycnidia, and considerable damage to the crop thereby ensue (Fig. 233).
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
RMPG4B02–. Diseases of plants induced by cryptogamic parasites : introduction to the study of pathogenic Fungi, slime-Fungi, bacteria, & Algae . Plant diseases; Parasitic plants; Fungi. 384 UREDINEAE. spores grow on needles and twigs of Coniferae, the aecidia on the leaves of various Eosaeeae (Pomaceae). Five species occur in Germany, but there are many in America. Gymnosporangium clavariaeforme Jacquin. (Britain and U.S. America.) The mycelium of this species perennates in twigs of Juniperus communis. Infection is brought about by aecidiospores. In the following year a swelling of attacked places
RMMCK58G–. FiG. 246.—Pendcrmiufii pini {corticola). Young twig bearing numerous aecidia. (V. Tubeuf phot.) Fig. '245.—Piridcnniurii pini (corlicola). Branch and lateral twigs distinctly swollen where attacked. They also bear aecidia. (v. Tubeuf phot.) ring ceases to thicken, but a.s the mycelium seldom succeeds during the first year in killing the cambium all round a
RMT1JGPT–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 PERIDERMIUM. 4ir The soft hypertrophied shoots are eaten. They occur chiefly in Scandinavia, but recently were observed by Gobi and Tranzschel in the neio-hbourhood of St. Petersburo. Fig. 252.—Accidiuiii coruscans on malformed shoots of Spruce. The compact abnormal shoots thickly covered with white aecidia contrast strongly with the normal portions, (v. Tubeitf phot, from material presented by Pro
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
RMPG4AN8–. Diseases of plants induced by cryptogamic parasites : introduction to the study of pathogenic Fungi, slime-Fungi, bacteria, & Algae . Plant diseases; Parasitic plants; Fungi. 418 UREDINEAE. Caeoma. Caeoma abietis-pectinatae Eeess.^ The aecidiospores may be found on the lower surface of young needles of silver fir; the aecidia are yellow elongated cushions situated on either side of the needle mid-rib, and are without peridia. Pycnidia (spermogonia) are pro- duced before the aecidia. The mycelium is septate and intercellular with few haustoria. I have found the fungus fairly abundant on t
RMMCK6CW–. FlG. l'46.—Pd-khnaiuiii piiii (corOcola). Young twig be.iring numerous aecidia. (v. Tnbeuf phot.) Fig. •lib.—Pirido-rahi.rii jtidi (rorlicola). Branch :ind lateral twigs distinctly swollen where attacked. Tliey also bear aecidia. (v. Tubeuf phot.) ring ceases to thicken, but as the mycelium seldom succeeds during the first year in killing the cambium all round a
RMT1HW1G–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 378 UREDINEAE. and small yellow pycnidia are produced during July or August. The aecidia follow from August till September, occupying yellow zones on the otherwise green needles; their white peridia project as much as 2 mm. above the surface of the needle, and dehisce by rupture of the apex. The aecidiospores are formed in large numbers and, carried by wind, reach leaves and shoots of alpine-rose whe
RM2AN307N–Fungi, Ascomycetes, Ustilaginales, Uredinales . r ig. 176. Puccinia Graminis Pers.; a. infected leaf of Bcrberis vulgaris,nat. size: />. group of aecidia, x 5. Uromyccs Poat Kabenh.; c.infected leaf of Ranun ultis ficaria, nat. size; d. group of aecidia,x 20; E. J. Welsford del. mother-cell (fig. 178). The spore mother-cell divides in the usual way,separating the aecidiospore above from its sister-cell below, but the latterhere forms an elongated stalk instead of an intercalary cell. Each outgrowthof the basal cell thus produces only a single spore, the mode of formationof which is exactly
RMPG4ANM–. Diseases of plants induced by cryptogamic parasites : introduction to the study of pathogenic Fungi, slime-Fungi, bacteria, & Algae . Plant diseases; Parasitic plants; Fungi. PERIDERMIUM. 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.—Aeddium coru^cans on malformed shoots of Spruce. The compact abnormal shoots thickly covered with white aecidia contrast strongly with the normal portions, (v. Tubeuf phot, from material presented by Prof. Fries, TJpsala.) P
RMMCK65B–. Fio. 179.—Schinzia cyptricola on Cyperus flavescens. Several roots show palmately- divided swellings. Isolated spore. (After Magnus.) Tuberculina persicina Ditm. The lilac-coloured spores are found on aecidia of I'eridcnntum 2nni and other aecidial forms, also on some species of Cacoma} (Britain and U.S. America.) ^ Plowright (British Ustilagineae) gives also Aec. afiperi/olii, Aec. tumlaninin and Roe-ftelia lacerata as hosts.
![Diseases of cultivated plants and Diseases of cultivated plants and trees diseasesofcultiv00massuoft Year: [1910?] 338 DISEASES OF CULTIVATED PLANTS forming fantastic curves. Aecidia fleshy, crowded, pale flesh- colour, spores angularly globose, orange-red. USTILAGINACEAE All the members of the present group are obligate parasites. In many instances the spores are produced in the ovary, often on the leaves, sometimes in the anthers. The spore pustules form sooty, black powdery masses when mature, and are Fig. ioo.—Gcrniin.iiing spores of species of Ustilaginaceae. I, Ustilago ariindinella Stock Photo](https://c8.alamy.com/comp/T1HT3A/diseases-of-cultivated-plants-and-diseases-of-cultivated-plants-and-trees-diseasesofcultiv00massuoft-year-1910-338-diseases-of-cultivated-plants-forming-fantastic-curves-aecidia-fleshy-crowded-pale-flesh-colour-spores-angularly-globose-orange-red-ustilaginaceae-all-the-members-of-the-present-group-are-obligate-parasites-in-many-instances-the-spores-are-produced-in-the-ovary-often-on-the-leaves-sometimes-in-the-anthers-the-spore-pustules-form-sooty-black-powdery-masses-when-mature-and-are-fig-ioogcrniiniiing-spores-of-species-of-ustilaginaceae-i-ustilago-ariindinella-T1HT3A.jpg "Diseases of cultivated plants and Diseases of cultivated plants and trees diseasesofcultiv00massuoft Year: [1910?] 338 DISEASES OF CULTIVATED PLANTS forming fantastic curves. Aecidia fleshy, crowded, pale flesh- colour, spores angularly globose, orange-red. USTILAGINACEAE All the members of the present group are obligate parasites. In many instances the spores are produced in the ovary, often on the leaves, sometimes in the anthers. The spore pustules form sooty, black powdery masses when mature, and are Fig. ioo.—Gcrniin.iiing spores of species of Ustilaginaceae. I, Ustilago ariindinella Stock Photo")
RMT1HT3A–Diseases of cultivated plants and Diseases of cultivated plants and trees diseasesofcultiv00massuoft Year: [1910?] 338 DISEASES OF CULTIVATED PLANTS forming fantastic curves. Aecidia fleshy, crowded, pale flesh- colour, spores angularly globose, orange-red. USTILAGINACEAE All the members of the present group are obligate parasites. In many instances the spores are produced in the ovary, often on the leaves, sometimes in the anthers. The spore pustules form sooty, black powdery masses when mature, and are Fig. ioo.—Gcrniin.iiing spores of species of Ustilaginaceae. I, Ustilago ariindinella
RM2AN30FD–Fungi, Ascomycetes, Ustilaginales, Uredinales . r ig. 176. Puccinia Graminis Pers.; a. infected leaf of Bcrberis vulgaris,nat. size: />. group of aecidia, x 5. Uromyccs Poat Kabenh.; c.infected leaf of Ranun ultis ficaria, nat. size; d. group of aecidia,x 20; E. J. Welsford del. mother-cell (fig. 178). The spore mother-cell divides in the usual way,separating the aecidiospore above from its sister-cell below, but the latterhere forms an elongated stalk instead of an intercalary cell. Each outgrowthof the basal cell thus produces only a single spore, the mode of formationof which is exactly
RMPG4B44–. Diseases of plants induced by cryptogamic parasites : introduction to the study of pathogenic Fungi, slime-Fungi, bacteria, & Algae . Plant diseases; Parasitic plants; Fungi. 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 (Lasch.) (Britain). On Spiraea FUipendula. T. echinatiun L6v. occurs on Meum; teleutospores alone are known (U.S. America). T. clavellosum Berk. On leaves of Aralia in the United States. Phragfmidium. Teleutospores multicellular, the i
RMMCK6JE–. Fig. ISl.—Uromucts Teppirianas on twigs of AlbUzia moiUana brought by Prof. Stahl from Java. (v. Tubeuf phot.) Puccinia. Teleutospores two-celled, and each abjointed from its own sporophore from large distinct sori. Each cell has as a rule only one germ-pore. Uredospores, teleutospores, and pycnidia (spermogonia) are not known in all the species. (1) Pycnidia, aecidia, uredospores, and teleutospores develop on the
RMT1HW63–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 384 UREDINKAK. spores grow on needles and twigs of Coniferae, the aecidia on the leaves of various Eosaceae (Pomaceae). Five species occur in (rerniany, but there are many in America. Gymnosporangium clavariaefonne Jacquin. (Britain and U.S. Anu'rica.) The mycelium of this species perennates in twigs of Junijyeriis communis. Infection is brought about by aecidiospores. In the following year a swelling
RM2CDC2XT–. Introduction to the study of fungi, their organography, classification, and distribution for the use of collectors . sne. ^nd couvcrscly the promycehal spores of Puccinia graminis (Fig 118) may be usedto inoculate the leaves of the berberry, and produce thereonAecidium herheridis. This is the theory and its application,which we will here leave as itstands. In another group, theBraclnj - pueciniae, spermogonia,uredospores, and teleutospores arefound on the same species of plant,but the aecidia are unknown. Tothis succeeds the Hcmi-fuecinia,in which uredospores and teleuto-spores occur on the
RMPG4APT–. Diseases of plants induced by cryptogamic parasites : introduction to the study of pathogenic Fungi, slime-Fungi, bacteria, & Algae . Plant diseases; Parasitic plants; Fungi. FiG. 246.—Fci-idennium pint (corticota). Youug twig bearing numerous aecidia. (v. Tubeuf phot.) Fig. 245.—Peiidei-vihim pini (cortkola). Branch and lateral twigs distinctly swollen where attacked. They also bear aecidia. (v. Tubeuf phot.) ring ceases to thicken, but as the mycelium seldom succeeds during the first year in killing the cambium all round a. Please note that these images are extracted from scanned page
RMMCK61Y–. FiG. ^iiJ.^Pf.id'.i-niU'.ui pnii (i-ort'a-ola). Young twig bearing numerous accidia. (v. Tnbeuf phot.) Fic. â Zib.''l,-idtrnuvj,i piiii (i-orHcolo). Branch and lateral twigs distinctly swollen where attacked. They also bear aecidia. (v. Tubeuf phot.) ring ceases to thicken, but as the mycelium seldom succeeds during the first year in killing the cambiuni all round a
RMT1HW1E–Diseases of plants induced by Diseases of plants induced by cryptogamuc parasites; introduction to the study of pathogenic fungi, slime-fungi, bacteria, and algae. English ed. by William G. Smith diseasesofplants00tubeuoft Year: 1897 378 UREDINEAE. and small yellow pycnidia are produced during July or August. The aecidia follow from August till September, occupying yellow zones on the otherwise green needles; their white peridia project as much as 2 mm. above the surface of the needle, and dehisce by rupture of the apex. The aecidiospores are formed in large numbers and, carried by wind, rea
RM2CECW61–. The book of wheat : an economic history and practical manual of the wheat industry. AECIDIA ON BARBERRY DISEASES OF WHEAT 163 of spores characteristic of the different stages in the life cycleof such a fungus are so different in form and character and sodivergent in their modes of development and subsequent habitsof growth as to mislead the investigator completely and exciteno idea of relationship. Several entiiely different types of hostsare frequently utilized in the life cycle. It is because of theircomplex life history that rusts have so long been shrouded inmystery and confusion, and in
RMPG4AYM–. Diseases of plants induced by cryptogamic parasites : introduction to the study of pathogenic Fungi, slime-Fungi, bacteria, & Algae . Plant diseases; Parasitic plants; Fungi. GYMNOSPORANGIUM. 387 may be as long as 10 m.m. and are bent like a born (Fig. 219). A similar case is described by Barclay^ in wbich the peridia of aecidia on Rhamnus dahurica were very long if produced in dry weather, but short if in moist weather.^ The aecidiospores are shed during the early part of June, and germinate at once on the bark of young juniper-twigs; the mycelium growing thence into the spurs or branch
![. Fkj. 230.—Spores of (Jt/M. iiiacropv.it. (After Woernle.) Roestelia pirata. This is one of the commonest causes of apple-rust and of the deformation known as " cedar apples " (Fig. 240). The anatomy of the latter structures has been described by Sanford.^ G. clavipes Cooke et I'eck, occurs on Ji'niprrus coimmmis. Its aecidia and pycnidia are found on Pyrus Mains, P. arhnti- folia, and AmclancMcr canadensis. ' Sanforcl, Amialx of Botcuiy, i., 1SS7. Stock Photo](https://c8.alamy.com/comp/MCK629/fkj-230spores-of-jtm-iiiacropvit-after-woernle-roestelia-pirata-this-is-one-of-the-commonest-causes-of-apple-rust-and-of-the-deformation-known-as-quot-cedar-apples-quot-fig-240-the-anatomy-of-the-latter-structures-has-been-described-by-sanford-g-clavipes-cooke-et-ieck-occurs-on-jiniprrus-coimmmis-its-aecidia-and-pycnidia-are-found-on-pyrus-mains-p-arhnti-folia-and-amclancmcr-canadensis-sanforcl-amialx-of-botcuiy-i-1ss7-MCK629.jpg ". Fkj. 230.—Spores of (Jt/M. iiiacropv.it. (After Woernle.) Roestelia pirata. This is one of the commonest causes of apple-rust and of the deformation known as " cedar apples " (Fig. 240). The anatomy of the latter structures has been described by Sanford.^ G. clavipes Cooke et I'eck, occurs on Ji'niprrus coimmmis. Its aecidia and pycnidia are found on Pyrus Mains, P. arhnti- folia, and AmclancMcr canadensis. ' Sanforcl, Amialx of Botcuiy, i., 1SS7. Stock Photo")
RMMCK629–. Fkj. 230.—Spores of (Jt/M. iiiacropv.it. (After Woernle.) Roestelia pirata. This is one of the commonest causes of apple-rust and of the deformation known as " cedar apples " (Fig. 240). The anatomy of the latter structures has been described by Sanford.^ G. clavipes Cooke et I'eck, occurs on Ji'niprrus coimmmis. Its aecidia and pycnidia are found on Pyrus Mains, P. arhnti- folia, and AmclancMcr canadensis. ' Sanforcl, Amialx of Botcuiy, i., 1SS7.
RMT1HW8A–Diseases of plants induced by Diseases of plants induced by cryptogamuc parasites; introduction to the study of pathogenic fungi, slime-fungi, bacteria, and algae. English ed. by William G. Smith diseasesofplants00tubeuoft Year: 1897 384 UREDIXEAE. spores grow on needles and twigs of Coniterae, the aecidia on the leaves of various Eosaceae (Poraaceae). Five species occur in Germany, hut there are many in America. Gymnosporangium clavariaeforme Jacquin. (Britain and U.S. America.) Tlie mycelium of this species perennates in twigs of Jimiperiis communis. Infection is brought about by aecidiosp
RM2CDCAY1–. Fungous diseases of plants, with chapters on physiology, culture methods and technique . he genus Gymnosporangium, Aside from a direct agreement inthe sequence of spore forms, and in the general relations of theseforms one to another in the different species, all have the samespore forms, namely, spermogonia, aecidia, and teleutospores ; andin the different species the same spore forms appear in almostthe identical season. PROTOBASIDIOMYCETES 423 There are about fifteen species of these fungi, all but one ofwhich have the aecidial or rust stage (Roestelia) on some memberof the tribe Pomeae,
RMPG4AWC–. Diseases of plants induced by cryptogamic parasites : introduction to the study of pathogenic Fungi, slime-Fungi, bacteria, & Algae . Plant diseases; Parasitic plants; Fungi. GYMNOSPORANGIUM. 397 the species already described in remaining closed at the apex, the spores escaping through trellis-like slits on the lateral walls of the peridia (Fig. 234). This fungus will not germinate on apple-trees, but on pears every leaf may be thickly covered with aecidia and pycnidia, and considerable damage to the crop thereby ensue (Fig. 233)... Pig. 231.—Longitudinal section through a conical teleut
RMMCK6JN–. Fig. 179.—Scydmia cypericola on Cyperus jlavescens. Several roots show palmately- divided swellings. Isolated sjjore. (After Magnus.) Tuberculina persicina Ditm. The lilac-coloured spores are found on aecidia of Peridcrmium ^j^mw and other aecidial forms, also on some species of Caeoma.} (Britain and U.S. America.) 1 Plowright {British Ustikiffineae) gives al.so Aec. asperifolii, Aec. tussilaginisy and Roestelia lacerata as hosts.
RMT1JEKM–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 350 UREDINEAE. Stems, leaf-stalks, and leaf-nervature often undergo one-sided tlnckening and curvature as a result of formation of aecidia. Wakker thus summarizes his observations on the anatomical changes in these malformed parts of Urtica: tliere is an en- largement of cells and an increase in the number of large inter- cellular spaces; no formation of collenchyma, interfascicular cambium, and chlo
RM2CEMCRT–. Journal of Agricultural Research. n-ed from tlie cold frames to the greenhouse. As soon as newshoots appeared it was evident that a number of the experiments hadbeen successful. Fifteen plants which had been propagated by rootingthe tips of rust-free plants were inoculated during August and Sep-tember, 1921. Nine of these plants developed aecidia the followingspring. An examination was made of the cane from which eachnew plant had been derived, material for sections having beenobtained at the time the new plant was separated from its parent.No hyphae were discovered in any of these canes. As
RMPG4B1X–. 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
RMMCK654–. Fkj. ISl. —i^•o/(ii/Ct•s TcirpirimiiiK on twi^s of Albizzia moniana brought by Prof. Stahl from Java. (v. Tubeuf phot.) Puccinia. Teleutospores two-celled, and eacli abjointed from its own sporophore from large distinct sori. Each cell has as a rule only one germ-pore. Uredospores, teleutospores, and pycnidia (spermogonia) are not known in all the species. (1) Pycnidia, aecidia, arcdoHpures,and teleutospores develop on the
RMT1HW89–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 384 UREDINEAE. spores grow on needles and twigs of Coniterae, the aecidia on the leaves of various liosaceae (Pomaceae). Five species occur in Germany, but there are many in America. Gymnosporangium clavariaeforme Jacquin. (Britain and U.S. Anu-rica.) Tlie mycelium of this species perennates in twigs of Juniperus communis. Infection is brought about by aecidiospores. In the following year a swelling
RM2CPNYHM–. Annual report . We can further say that every effort will be made by usto prevent importations of pine. The disease is well under control and ouronly trouble will be to prevent nurserymen and private parties from im-porting. The accompanying colored plate shows the appearance of the diseaseand an explanation follows: Plate 1. A live, young white pine plant showing swelling of thetrunk and of the branches at the whorl, and on these swollen parts the yellowspore bags (Aecidia) of the Peridermium Strobi. Plate 2. Branch of the white pine showing the swelling caused by theblister rust. The entir
RMPG4ARA–. Diseases of plants induced by cryptogamic parasites : introduction to the study of pathogenic Fungi, slime-Fungi, bacteria, & Algae . Plant diseases; Parasitic plants; Fungi. 408 UBEDINEAE. cone rust. This disease is found on the cones of spruce. The aecidia are brown somewhat flattened spheres, and appear in large numbers on cones distinguished by their scales standing stiffly open even in damp weather (Fig. 243). The germ- tubes of the fungus find entrance in spring into the flowers or young spruce-cones, and the mycelium lives parasitic in the green scales without causing any marked c
RMMCK65Y–. Fio. ISO. —Uroiwjces pisi. Comparison of healthy flowu Ci/parissiu.i, with a much-elongated, non-flowcriug plant rust. (v. Tubeuf phot.) cortex and pith, while at the same time those of tlie cortical parenchyma become somewhat enlarged and altered in shape; the woody portion is less developed than normally; and laticiferous tubes are neither so large nor so conspicuous as usual. The aecidia of this species are found only on the lower surface of the leaf; they are saucer-shaped, and have a broad lobed white margin.
RMT1JGRC–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 418 UREDINEAE. Caeoma. Caeoma abietis-pectinatae Keess. The aecidiospores may be found on the lower surface of young needles of silver fir; the aecidia are yellow elongated cushions situated on either side of the needle mid-rib, and are without peridia. Pycnidia (spermogonia) are pro- duced before the aecidia. The mycelium is septate and intercellular with few haustoria. I have found the fungus fairly
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
RMPG4ATH–. Diseases of plants induced by cryptogamic parasites : introduction to the study of pathogenic Fungi, slime-Fungi, bacteria, & Algae . Plant diseases; Parasitic plants; Fungi. 402 UREDINEAE. G. Ellisii Berk. On Chamaecyparis thyoides. The aecidial stage on Pyrus Mains and P. arhutifolia. On red cedar {Junipencs virginiana): G. macropus Lk. The aecidia and pycnidia occur on Pyrus Malus, P. coronaria, P. arhutifolia, Cratct^us tomentosa, C. Bouglasii, and Amelanchier canadensis; they are known as. Pig. 237.—Spores of Gym. hiseptaium. (After Woenile.) Fig. 23S.—Spores of Gym. Elliiii. (After
RMMCK64G–. Fio. IttO.—Ananone-RMt. 2 and 3, Normal plants of Anemone ranv.nculoides. 4, Aicidium pv.nclo.luiu on Anemone ranv.nculoides ; aecidia on the lower surface of the leaf; the plants are abnormally elongated, and the leaf-segments are smaller. 6 and 7, Puccinia fusca on Anemone nemorosa; the plants remiin small, 6 is completely deformed, 7 partially. 1 and 5, Aecidium leucospermum on Ammone ncmorom ; the plants are abnormally elongated and the leaf-segments smaller, (v. Tubeuf del.)
RMT1HWD2–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 GYMNOSPORANGIUM. 387 may be as long as 10 m.m. and are bent like a horn (Fig. 219). A similar case is described by Barclay in which the peridia of aecidia on Rhamnus daliurica were very long if produced in dry weather, but short if in moist weather. The aecidiospores are shed during the early part of June, and germinate at once on the bark of young juniper-twigs; the mycelium growing thence into the
RM2CDCB21–. Fungous diseases of plants, with chapters on physiology, culture methods and technique . Fig. 202. PucciNiA graminis. (After Ward)rt, section of barberry leaf showing spermogonia and aecidia; h, aecidium stage, which breaks through the epidermis in somewhat similarmanner. The spermogonium shows a very simple development,resulting by the gradual growth in extent of a small mass of fila-mentous hyphae developing in an intercellular manner just beneath 412 FUNGOUS DISEASES OF PLANTS the upper epidermis. At maturity the flask-shaped body consistsof an indefinite wall, later giving rise to numero
RMPG4AXX–. Diseases of plants induced by cryptogamic parasites : introduction to the study of pathogenic Fungi, slime-Fungi, bacteria, & Algae . Plant diseases; Parasitic plants; Fungi. 390 UREDINEAE. In May or June the cushions swell up and become large brownish-yellow gelatinous clumps, dotted over with dark points, the teleutospores. Promycelia arise from one or more germ- pores in each spore, and give off basidia with sporidia (basidio-. FiG. 224.—Aecidia and Pycnidia of various species of Gyninosporangium : G. tremetloides—1 and S, aecidia on leaf of Pyrvs Ai-ia ; 5 and 6, aecidia on leaf of P
RMMCK6JP–. Fig. 183.âPuccinia (/raminis {Aecidium herheridis) on Berberis convmunis. The lowest leaf and two others are seen on the upper surface, and show red spots with light margins, in which the pycnidia are embedded. The other leaves show the under surface with patches of aecidia. (v. Tubeuf del.) to their neighbours to form the peridium. Diseased portions of leaves become considerably thickened. The cells of the single layer of palisade parenchyma are abnormally elongated, and the intercellular spaces of the spongy parenchyma, instead of being large, are small and filled with mycelium. The aecidi
![Diseases of cultivated plants and Diseases of cultivated plants and trees diseasesofcultiv00massuoft Year: [1910?] Fig. 89—Pucchiiagraminis. i, wheat leaves with uredo pustules ; 2, a uredo sorus ; 3, uredospores in different stages of development; 4, uredospore germinating ; 5, culm of wheat with teleutospore sori; 6, teleutospores in different stages of development ; 7, teleuto- spore that has germinated and produced a germ-tube bearing three sporidiola or secondary spores ; 8, barberry leaf with clusters of aecidia ; 9, section of an aecidium with chains of aecidiospores ; 10, two aecidia Stock Photo](https://c8.alamy.com/comp/T1HP89/diseases-of-cultivated-plants-and-diseases-of-cultivated-plants-and-trees-diseasesofcultiv00massuoft-year-1910-fig-89pucchiiagraminis-i-wheat-leaves-with-uredo-pustules-2-a-uredo-sorus-3-uredospores-in-different-stages-of-development-4-uredospore-germinating-5-culm-of-wheat-with-teleutospore-sori-6-teleutospores-in-different-stages-of-development-7-teleuto-spore-that-has-germinated-and-produced-a-germ-tube-bearing-three-sporidiola-or-secondary-spores-8-barberry-leaf-with-clusters-of-aecidia-9-section-of-an-aecidium-with-chains-of-aecidiospores-10-two-aecidia-T1HP89.jpg "Diseases of cultivated plants and Diseases of cultivated plants and trees diseasesofcultiv00massuoft Year: [1910?] Fig. 89—Pucchiiagraminis. i, wheat leaves with uredo pustules ; 2, a uredo sorus ; 3, uredospores in different stages of development; 4, uredospore germinating ; 5, culm of wheat with teleutospore sori; 6, teleutospores in different stages of development ; 7, teleuto- spore that has germinated and produced a germ-tube bearing three sporidiola or secondary spores ; 8, barberry leaf with clusters of aecidia ; 9, section of an aecidium with chains of aecidiospores ; 10, two aecidia Stock Photo")
RMT1HP89–Diseases of cultivated plants and Diseases of cultivated plants and trees diseasesofcultiv00massuoft Year: [1910?] Fig. 89—Pucchiiagraminis. i, wheat leaves with uredo pustules ; 2, a uredo sorus ; 3, uredospores in different stages of development; 4, uredospore germinating ; 5, culm of wheat with teleutospore sori; 6, teleutospores in different stages of development ; 7, teleuto- spore that has germinated and produced a germ-tube bearing three sporidiola or secondary spores ; 8, barberry leaf with clusters of aecidia ; 9, section of an aecidium with chains of aecidiospores ; 10, two aecidia
RM2CDDB2K–. The rusts of Australia, their structure, nature, and classification . R. S.BrojMs GovtPrtnUr. CCBrtideboAkJil D2feAlfii/ie.DirerU, CHRYSANTHEMUM, MARIGOLD, VIOLET, AND DAISY RUSTS. 232 Explanation of Plates. PLATE F. (All Figures nat. size.) PUCCINIA LAGENOPHORAE ON LAGENOPHORA BILLARDIERI. Fig. 27. Aecidia and teleutosori on both surfaces of leaves. PUCCINIA MALVACEARUM on LAVATERA PLEBEIA. 2S. Teleutosori on under surface of leaf and on leaf-stalk. PUCCINIA MORRISONI ON PELARGONIUM AUSTRALE.29. Aecidia, uredo, and teleutosori on under surface of leaf, and teleutosori on stem. PLATE F. CCBr
RMPG4ANY–. Botany for agricultural students . Botany. 402 THALU)PHYTES disease on the leaves and fruit. Upon the Apple tree, the aecidia stage is produced, and the aecidiospores are able to attack the Cedar and form new galls, thus completing the life cycle as shown in Figure 361. Pine Tree Blister-rust (Cronartium ribicola). — As its name suggests this Rust attacks Pine trees. It was introduced from Europe about ten years ago and has now become a seri- ous disease in this country. It has its aecidial stage on Pines with five leaves in a fascicle, such as the White Pine and Sugar Pine, and has species
RMMCK6JF–. Fig. 180. — Uromycei pisi. Comparison of liealthy flowei-ing plant of Euphorbia Ci/parissias, with a much-elongated, non-flowering plant bearing aecidia of Pea- rust, (v. Tubeuf phot.) corte.K and pith, while at the same time those of the cortical parenchyma become somewhat enlarged and altered in shape; the woody portion is less developed than normally; and laticiferous tubes are neither so large nor so conspicuous as usual. The aecidia of this species are found only on the lower surface of the leaf; they are saucer-shaped, and have a broad lobed white margin.
RMT1HTTE–Diseases of plants induced by Diseases of plants induced by cryptogamuc parasites; introduction to the study of pathogenic fungi, slime-fungi, bacteria, and algae. English ed. by William G. Smith diseasesofplants00tubeuoft Year: 1897 Fig. 205.âCnh/ptottpo'a Gotppertiano. Aecidia on the under surface of needles of Silver Fir. (v. Tubeuf del.) Kiii. 20d.âAecidiuin in a needle of Silver Fir (much enlarjjed). h. Series of aecidiospores and intermediate cells. 'â , (icniiinatin' aecidiospores. (.ftcr R. HartiK.) This aecidium is also fouml on Alii<s rrfi/K'/onini in I'jiju'r iJavaria. Barc
RM2CDDB16–. The rusts of Australia, their structure, nature, and classification . CCBrittUianh,I)d D McMpine,,Dvrexvb. R.SBrouji GovtPnnter. LAGENOPHORA, MALLOW, AND PELARGONIUM RUSTS. 234 Explanation of Plates. PLATE G. {All Figures nat. size.)UKOMYCES CARYOPHYLLINUS ON CARNATION (Dianthus caryophyllus). Fig. 30. Uredosori on upper surface of leaf. 31. Teleutosori on both surfaces. UROMYCES TRIFOLII on WHITE CLOVER (Trifolium repens). 32. Aecidia, uredo, and teleutosori on leaf. UROMYCES VESICULOSUS on ZYGOPHYLLUM GLAUCESCENS. 33. Uredo and teleutosori on both surfaces ot leaves and on stems. UFOMYCES
RMPG4B1T–. Diseases of plants induced by cryptogamic parasites : introduction to the study of pathogenic Fungi, slime-Fungi, bacteria, & Algae . Plant diseases; Parasitic plants; Fungi. Fig. 204.—Diseased stem of Vaccinium in a later stage than Fig. 203. In each epidermal cell (a, a) six mother-cells have been formed, each subdivided into four teleutospores. Promycelia (6) have developed from many of tbe latter, and are in process of abjointing ofE the sporidia from lateral sterigmata. X 420. (After R. Hartig.). Fig. 205.—Calypiospora Goeppertiana. Aecidia on the under surface of needles of Silver
![. Fig. 183.—Puecinio i/ramiiiii (Aeeidiuiii lnrUriJis) on BerUris co»niiuni». Tlie lowest leaf and tWD othcis ure Hccn on the upper surface, and show red spots with liKht niarto»», i" which the pycnidia are embedded. The other leave.s «how the under surface with patches of aecidia. (v. Tubeuf del.) to their iieighljours to I'oiiii the peiidiuiu. diseased ])i)rtinns of leaves become considerably thickened. The cells of the single layer of palisade parenchyma are abnormally elongated, and the intercellular spaces of the spongy parenchyma, instead of being large, are small and filled wiili m Stock Photo](https://c8.alamy.com/comp/MCK5C0/fig-183puecinio-iramiiiii-aeeidiuiii-lnrurijis-on-beruris-coniiuni-tlie-lowest-leaf-and-twd-othcis-ure-hccn-on-the-upper-surface-and-show-red-spots-with-likht-niarto-iquot-which-the-pycnidia-are-embedded-the-other-leaves-how-the-under-surface-with-patches-of-aecidia-v-tubeuf-del-to-their-iieighljours-to-ioiiii-the-peiidiuiu-diseased-irtinns-of-leaves-become-considerably-thickened-the-cells-of-the-single-layer-of-palisade-parenchyma-are-abnormally-elongated-and-the-intercellular-spaces-of-the-spongy-parenchyma-instead-of-being-large-are-small-and-filled-wiili-m-MCK5C0.jpg ". Fig. 183.—Puecinio i/ramiiiii (Aeeidiuiii lnrUriJis) on BerUris co»niiuni». Tlie lowest leaf and tWD othcis ure Hccn on the upper surface, and show red spots with liKht niarto»», i" which the pycnidia are embedded. The other leave.s «how the under surface with patches of aecidia. (v. Tubeuf del.) to their iieighljours to I'oiiii the peiidiuiu. diseased ])i)rtinns of leaves become considerably thickened. The cells of the single layer of palisade parenchyma are abnormally elongated, and the intercellular spaces of the spongy parenchyma, instead of being large, are small and filled wiili m Stock Photo")
RMMCK5C0–. Fig. 183.—Puecinio i/ramiiiii (Aeeidiuiii lnrUriJis) on BerUris co»niiuni». Tlie lowest leaf and tWD othcis ure Hccn on the upper surface, and show red spots with liKht niarto»», i" which the pycnidia are embedded. The other leave.s «how the under surface with patches of aecidia. (v. Tubeuf del.) to their iieighljours to I'oiiii the peiidiuiu. diseased ])i)rtinns of leaves become considerably thickened. The cells of the single layer of palisade parenchyma are abnormally elongated, and the intercellular spaces of the spongy parenchyma, instead of being large, are small and filled wiili m
RMT1HTTG–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 Fifi. 204.—Diseased stem of I'lurinium in a Liter stage than Fig. 203. In each epirteniial cell («, (() .six mother-cells have been fonned, eafh subdivided into four teleutosiiores. Promycelia ('/) have developed from many of the latter, and are in process of abjointing off the sporidia from lateral sterigmata. X 420. (After R. Hartig.) Fio. 205.—CulypiOKpora OoipiKAiano. Aecidia on the under surf
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
![. Lessons in botany. Botany. FUNGI: WHEAT RUST. 133 For a fuller study of the wheat rust and of other fungi see the author's larger " Elementary Botany," Chapters XX, XXI.. Wheat rust. Fig. 113- Section through leaf of barberry at point affected with the cluster-cup stage of the wheat rust; spermagonia above, aecidia below. (After Marshall-Ward.) Synopsis. A parasite on grains, grasses, and on the barberry. Vegetative part of plant; mycelium growing within the tissues of the host. Fruiting part of the plant. 1st. Red rust (one-celled spores in pustules on blades and stems of the whea Stock Photo](https://c8.alamy.com/comp/PG00XN/lessons-in-botany-botany-fungi-wheat-rust-133-for-a-fuller-study-of-the-wheat-rust-and-of-other-fungi-see-the-authors-larger-quot-elementary-botanyquot-chapters-xx-xxi-wheat-rust-fig-113-section-through-leaf-of-barberry-at-point-affected-with-the-cluster-cup-stage-of-the-wheat-rust-spermagonia-above-aecidia-below-after-marshall-ward-synopsis-a-parasite-on-grains-grasses-and-on-the-barberry-vegetative-part-of-plant-mycelium-growing-within-the-tissues-of-the-host-fruiting-part-of-the-plant-1st-red-rust-one-celled-spores-in-pustules-on-blades-and-stems-of-the-whea-PG00XN.jpg ". Lessons in botany. Botany. FUNGI: WHEAT RUST. 133 For a fuller study of the wheat rust and of other fungi see the author's larger " Elementary Botany," Chapters XX, XXI.. Wheat rust. Fig. 113- Section through leaf of barberry at point affected with the cluster-cup stage of the wheat rust; spermagonia above, aecidia below. (After Marshall-Ward.) Synopsis. A parasite on grains, grasses, and on the barberry. Vegetative part of plant; mycelium growing within the tissues of the host. Fruiting part of the plant. 1st. Red rust (one-celled spores in pustules on blades and stems of the whea Stock Photo")
RMPG00XN–. Lessons in botany. Botany. FUNGI: WHEAT RUST. 133 For a fuller study of the wheat rust and of other fungi see the author's larger " Elementary Botany," Chapters XX, XXI.. Wheat rust. Fig. 113- Section through leaf of barberry at point affected with the cluster-cup stage of the wheat rust; spermagonia above, aecidia below. (After Marshall-Ward.) Synopsis. A parasite on grains, grasses, and on the barberry. Vegetative part of plant; mycelium growing within the tissues of the host. Fruiting part of the plant. 1st. Red rust (one-celled spores in pustules on blades and stems of the whea
RMMCKC9P–. Fig. 96.—Cronartium ribicohint. i, uredo and teleuto- spore stages on leaf of black currant; 2, uredospores, (Z, and teleutospores, b, cemented together in a column ; 3, uredospore ; 4, teleutospores, two of which are germi- nating ; 5, aecidia on bark of Weymouth pine; 6, aecidiospores. Figs, i and 5 nat. size, remainder highly mag. aggregated into a column which springs from the sorus of uredospores. Weymouth pine rust {Cronartium ribicolum, Deitr. = Peridermium sirobi, Kleb.).—The aecidium stage of this
![Diseases of cultivated plants and Diseases of cultivated plants and trees diseasesofcultiv00massuoft Year: [1910?] UROMYCES 293 Haricot bean rust.—Haricot beans or 'scarlet-runners' are often attacked by Uromyces appendiculatus (Link.) causing the leaves to fall early, when the development of pods is checked. Aecidia, uredo, and teleutospore stages all follow in succession, forming numerous minute brown pustules on the leaves. Aecidiospores angularly globose, whitish, slightly punctulate, 17-32 X 14-20/x. Uredospores pale brown, aculeolate, 24-33X 16-20 /. Teleutospores elliptical or subglob Stock Photo](https://c8.alamy.com/comp/T1H2GX/diseases-of-cultivated-plants-and-diseases-of-cultivated-plants-and-trees-diseasesofcultiv00massuoft-year-1910-uromyces-293-haricot-bean-rustharicot-beans-or-scarlet-runners-are-often-attacked-by-uromyces-appendiculatus-link-causing-the-leaves-to-fall-early-when-the-development-of-pods-is-checked-aecidia-uredo-and-teleutospore-stages-all-follow-in-succession-forming-numerous-minute-brown-pustules-on-the-leaves-aecidiospores-angularly-globose-whitish-slightly-punctulate-17-32-x-14-20x-uredospores-pale-brown-aculeolate-24-33x-16-20-teleutospores-elliptical-or-subglob-T1H2GX.jpg "Diseases of cultivated plants and Diseases of cultivated plants and trees diseasesofcultiv00massuoft Year: [1910?] UROMYCES 293 Haricot bean rust.—Haricot beans or 'scarlet-runners' are often attacked by Uromyces appendiculatus (Link.) causing the leaves to fall early, when the development of pods is checked. Aecidia, uredo, and teleutospore stages all follow in succession, forming numerous minute brown pustules on the leaves. Aecidiospores angularly globose, whitish, slightly punctulate, 17-32 X 14-20/x. Uredospores pale brown, aculeolate, 24-33X 16-20 /. Teleutospores elliptical or subglob Stock Photo")
RMT1H2GX–Diseases of cultivated plants and Diseases of cultivated plants and trees diseasesofcultiv00massuoft Year: [1910?] UROMYCES 293 Haricot bean rust.—Haricot beans or 'scarlet-runners' are often attacked by Uromyces appendiculatus (Link.) causing the leaves to fall early, when the development of pods is checked. Aecidia, uredo, and teleutospore stages all follow in succession, forming numerous minute brown pustules on the leaves. Aecidiospores angularly globose, whitish, slightly punctulate, 17-32 X 14-20/x. Uredospores pale brown, aculeolate, 24-33X 16-20 /. Teleutospores elliptical or subglob
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,
![. Fig. 237.—Spores of Gym. hiscptatum, (After Woernle.) Fio. 238.—Spores of Gi/m. Ellisii. (After Woernle.) Fig. 239.—Spores of Gym. macropus. (After Woernle.) Roestclia pirata. This is one of the commonest causes of apple-rust and of the deformation known as " cedar apples " (Fig. 240). The anatomy of the latter structures has been described by Sanford.^ G. clavipes Cooke et Peck, occurs on Juniprrus commnnis. Its aecidia and pycnidia are found on Pyrus Mains, P. arhuti- folia, and AmclancJiier canadensis. ^ Sanford, Annals of Botany, i., 1887. Stock Photo](https://c8.alamy.com/comp/MCK58W/fig-237spores-of-gym-hiscptatum-after-woernle-fio-238spores-of-gim-ellisii-after-woernle-fig-239spores-of-gym-macropus-after-woernle-roestclia-pirata-this-is-one-of-the-commonest-causes-of-apple-rust-and-of-the-deformation-known-as-quot-cedar-apples-quot-fig-240-the-anatomy-of-the-latter-structures-has-been-described-by-sanford-g-clavipes-cooke-et-peck-occurs-on-juniprrus-commnnis-its-aecidia-and-pycnidia-are-found-on-pyrus-mains-p-arhuti-folia-and-amclancjiier-canadensis-sanford-annals-of-botany-i-1887-MCK58W.jpg ". Fig. 237.—Spores of Gym. hiscptatum, (After Woernle.) Fio. 238.—Spores of Gi/m. Ellisii. (After Woernle.) Fig. 239.—Spores of Gym. macropus. (After Woernle.) Roestclia pirata. This is one of the commonest causes of apple-rust and of the deformation known as " cedar apples " (Fig. 240). The anatomy of the latter structures has been described by Sanford.^ G. clavipes Cooke et Peck, occurs on Juniprrus commnnis. Its aecidia and pycnidia are found on Pyrus Mains, P. arhuti- folia, and AmclancJiier canadensis. ^ Sanford, Annals of Botany, i., 1887. Stock Photo")
RMMCK58W–. Fig. 237.—Spores of Gym. hiscptatum, (After Woernle.) Fio. 238.—Spores of Gi/m. Ellisii. (After Woernle.) Fig. 239.—Spores of Gym. macropus. (After Woernle.) Roestclia pirata. This is one of the commonest causes of apple-rust and of the deformation known as " cedar apples " (Fig. 240). The anatomy of the latter structures has been described by Sanford.^ G. clavipes Cooke et Peck, occurs on Juniprrus commnnis. Its aecidia and pycnidia are found on Pyrus Mains, P. arhuti- folia, and AmclancJiier canadensis. ^ Sanford, Annals of Botany, i., 1887.
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
RM2CDD8JW–. The rusts of Australia, their structure, nature, and classification . C. JACKSONIAE ON GOMPHOLOBIUM LATIFOLIUM. 3i8 Explanation of Plates. PLATE XXXIX. (All aecidia X 50, and aecidiosfores X 300.) AECIDIUM.Fig. 2S7. A. veronicae on Veronica sp. 288. A. flantaginis-variae on Plan/ago varia. 2S9. A. lobeliae Thuem., on Lobelia fratioides, described in connexion with Pucciniaaucta. The free margin ruptures irregularly, and it is sometimes difficult todetect a peridial wall, so that it partakes of the nature of a Caeoma. 290. A. cymbonoti on Cymbonotus lawsonianus. 291. A. monocystis on Abrotane
![. Fig. 206.—Aecidium in a needle of Silver Fir (much enlarged), b, Series of aecidiospores and intermediate cells. '•, Germinating aecidiospores. (After R. Hartig.) This aecidium is also fouud on Abies cephalonica in Upper Bavaria. Barclayella deformans Diet.^ This has been found in the Himalaya region on needles and young twigs of Picea Morinda (Smithiana). Teleuto- spore-sori are developed, accompanied by distortion of the host. Aecidia and uredospores are unknown. ^Barclay, "Oil a Uredo of the Himalaya Spritce-Jir." Hedwigia, 1891. Calcutta, 1886; and Stock Photo](https://c8.alamy.com/comp/MCK6G9/fig-206aecidium-in-a-needle-of-silver-fir-much-enlarged-b-series-of-aecidiospores-and-intermediate-cells-germinating-aecidiospores-after-r-hartig-this-aecidium-is-also-fouud-on-abies-cephalonica-in-upper-bavaria-barclayella-deformans-diet-this-has-been-found-in-the-himalaya-region-on-needles-and-young-twigs-of-picea-morinda-smithiana-teleuto-spore-sori-are-developed-accompanied-by-distortion-of-the-host-aecidia-and-uredospores-are-unknown-barclay-quotoil-a-uredo-of-the-himalaya-spritce-jirquot-hedwigia-1891-calcutta-1886-and-MCK6G9.jpg ". Fig. 206.—Aecidium in a needle of Silver Fir (much enlarged), b, Series of aecidiospores and intermediate cells. '•, Germinating aecidiospores. (After R. Hartig.) This aecidium is also fouud on Abies cephalonica in Upper Bavaria. Barclayella deformans Diet.^ This has been found in the Himalaya region on needles and young twigs of Picea Morinda (Smithiana). Teleuto- spore-sori are developed, accompanied by distortion of the host. Aecidia and uredospores are unknown. ^Barclay, "Oil a Uredo of the Himalaya Spritce-Jir." Hedwigia, 1891. Calcutta, 1886; and Stock Photo")
RMMCK6G9–. Fig. 206.—Aecidium in a needle of Silver Fir (much enlarged), b, Series of aecidiospores and intermediate cells. '•, Germinating aecidiospores. (After R. Hartig.) This aecidium is also fouud on Abies cephalonica in Upper Bavaria. Barclayella deformans Diet.^ This has been found in the Himalaya region on needles and young twigs of Picea Morinda (Smithiana). Teleuto- spore-sori are developed, accompanied by distortion of the host. Aecidia and uredospores are unknown. ^Barclay, "Oil a Uredo of the Himalaya Spritce-Jir." Hedwigia, 1891. Calcutta, 1886; and
![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 GYMNOSPORANGIUM. 403 G. globosum Farl. Aecidia on Pz/rus Mains, P. communis, i'ljihyaia cuhjaris, Sorhus americana, and species of Crataegus. G. nidus-avis Thaxt. Aecidia and pycnidia on Pyrus Mains, Amclanchier canadensis, and Cydouia vulgaris. On the red cedar it causes the ' bird's nest' deformation of the branch-system. G, speciosum Peck. On Junipenis â oecidcntalis. G. Cunninghamianum ]jarcl. On Stock Photo](https://c8.alamy.com/comp/T1HWYH/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-gymnosporangium-403-g-globosum-farl-aecidia-on-pzrus-mains-p-communis-iljihyaia-cuhjaris-sorhus-americana-and-species-of-crataegus-g-nidus-avis-thaxt-aecidia-and-pycnidia-on-pyrus-mains-amclanchier-canadensis-and-cydouia-vulgaris-on-the-red-cedar-it-causes-the-birds-nest-deformation-of-the-branch-system-g-speciosum-peck-on-junipenis-oecidcntalis-g-cunninghamianum-jarcl-on-T1HWYH.jpg "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 GYMNOSPORANGIUM. 403 G. globosum Farl. Aecidia on Pz/rus Mains, P. communis, i'ljihyaia cuhjaris, Sorhus americana, and species of Crataegus. G. nidus-avis Thaxt. Aecidia and pycnidia on Pyrus Mains, Amclanchier canadensis, and Cydouia vulgaris. On the red cedar it causes the ' bird's nest' deformation of the branch-system. G, speciosum Peck. On Junipenis â oecidcntalis. G. Cunninghamianum ]jarcl. On Stock Photo")
RMT1HWYH–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 GYMNOSPORANGIUM. 403 G. globosum Farl. Aecidia on Pz/rus Mains, P. communis, i'ljihyaia cuhjaris, Sorhus americana, and species of Crataegus. G. nidus-avis Thaxt. Aecidia and pycnidia on Pyrus Mains, Amclanchier canadensis, and Cydouia vulgaris. On the red cedar it causes the ' bird's nest' deformation of the branch-system. G, speciosum Peck. On Junipenis â oecidcntalis. G. Cunninghamianum ]jarcl. On
RM2CDCB53–. Fungous diseases of plants, with chapters on physiology, culture methods and technique . oduced on stems andtwigs (Fig. 198), and the uredoand teleuto stages occur alsoon the leaf-like branches. Theaecidial stage may appear atalmost any point in the United States with a growing season no shorter than that of northernNew Jersey. The aecidia appear in rather long, light green,cushion-like areas. They are short-cylindrical, with a white perid-ium, and the spores appear orange colored from the contents ;the wall, however, is hyaline and granulose. The spores meas-ure 15-18/Lt in diameter. They m
RMMCK59C–. Fio. 233.—Gymnosporangium sahinae in the form of Roestelia canceliata on leaves of Pear. A few twigs showing the abundance of aecidia over the whole tree. (v. Tubeuf phot.) isolated crystals but as masses. Cork-formation was suspended in Wakker's case, while in Fentzling's a partial formation of cork was distinguishable beneath the epidermis. The increased thickness of diseased leaves is due principally to multiplication of the spongy parenchyma, the upper layers of which frequently become more or less palisade-like. When pycnidia (spermogonia) are formed on the upper leaf-surface, the palis
RMT1HWD3–Diseases of plants induced by Diseases of plants induced by cryptogamuc parasites; introduction to the study of pathogenic fungi, slime-fungi, bacteria, and algae. English ed. by William G. Smith diseasesofplants00tubeuoft Year: 1897 GYMXOSPORANGIUM. 387 may be as long as 10 ra.m. and are bent like a horn (Fig. 219). A similar case is described by Barclay in which the peridia of aecidia on Rhamnus dahurica were very long if produced in dry weather, but short if in moist weather.- The aecidiospores are shed during the early part of June, and germinate at once on the bariv of young juniper-twi
RM2CDD8N2–. The rusts of Australia, their structure, nature, and classification . G. H. Robinson, Pilot. CRONARTIUM.C. JACKSONIAE ON PLATYLOBIUM AND AOTUS. 3i6 Explanation of Plates. PLATE XXXVIII. CRONARTIUM JACKSONIAE.Fig.2S5. Witches broom, due to C. jacksoniae on Gomfholobium latifolium ... nat. size 286. Normal healthy shoot of Gomfholobium latifolium ... ... nat. size Plate XXXVIII.. G. H. Robinson, Phot. • Nat. size. CRONARTIUM. C. JACKSONIAE ON GOMPHOLOBIUM LATIFOLIUM. 3i8 Explanation of Plates. PLATE XXXIX. (All aecidia X 50, and aecidiosfores X 300.) AECIDIUM.Fig. 2S7. A. veronicae on Veronica
![. Fig. 237.—Spores of Gym. hiscptatuiii. (After Woernle.) Fig. 238.—Spores of Gyin. Ellisii. (After Woernle.) Fig. 239.—Spores of Gym. macropu*. (After Woernle.) Rocstelia pirata. This is one of the commonest causes of apple-rust and of the deformation known as " cedar apples " (Fig. 240), The anatomy of the latter structures has been described by Sanford.'^ G. clavipes Cooke et Peck, occurs on Junipcriis communis. Its aecidia and pycnidia are found on Pyrus Mains, P. arhuti- folia, and Amelanchier canadensis. ' Sanford, Annaln of Botany, i., 1887. Stock Photo](https://c8.alamy.com/comp/MCK6E0/fig-237spores-of-gym-hiscptatuiii-after-woernle-fig-238spores-of-gyin-ellisii-after-woernle-fig-239spores-of-gym-macropu-after-woernle-rocstelia-pirata-this-is-one-of-the-commonest-causes-of-apple-rust-and-of-the-deformation-known-as-quot-cedar-apples-quot-fig-240-the-anatomy-of-the-latter-structures-has-been-described-by-sanford-g-clavipes-cooke-et-peck-occurs-on-junipcriis-communis-its-aecidia-and-pycnidia-are-found-on-pyrus-mains-p-arhuti-folia-and-amelanchier-canadensis-sanford-annaln-of-botany-i-1887-MCK6E0.jpg ". Fig. 237.—Spores of Gym. hiscptatuiii. (After Woernle.) Fig. 238.—Spores of Gyin. Ellisii. (After Woernle.) Fig. 239.—Spores of Gym. macropu*. (After Woernle.) Rocstelia pirata. This is one of the commonest causes of apple-rust and of the deformation known as " cedar apples " (Fig. 240), The anatomy of the latter structures has been described by Sanford.'^ G. clavipes Cooke et Peck, occurs on Junipcriis communis. Its aecidia and pycnidia are found on Pyrus Mains, P. arhuti- folia, and Amelanchier canadensis. ' Sanford, Annaln of Botany, i., 1887. Stock Photo")
RMMCK6E0–. Fig. 237.—Spores of Gym. hiscptatuiii. (After Woernle.) Fig. 238.—Spores of Gyin. Ellisii. (After Woernle.) Fig. 239.—Spores of Gym. macropu*. (After Woernle.) Rocstelia pirata. This is one of the commonest causes of apple-rust and of the deformation known as " cedar apples " (Fig. 240), The anatomy of the latter structures has been described by Sanford.'^ G. clavipes Cooke et Peck, occurs on Junipcriis communis. Its aecidia and pycnidia are found on Pyrus Mains, P. arhuti- folia, and Amelanchier canadensis. ' Sanford, Annaln of Botany, i., 1887.
RMT1HWAE–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 GYMNOSPORANGIUM. 387 may be as long as 10 m.m. and are bent like a horn (Fig. 219). A similar case is described by Barclay in which the peridia of aecidia on Rhammis dahnrica were very long if produced in dry weather, but short if in moist weather. The aecidiospores are shed during the early part of June, and germinate at once on the bark of young juniper-twigs; the mycelium growing thence into the s
RM2CDDB5K–. The rusts of Australia, their structure, nature, and classification . !» 5 7 ? His ... r; r CCBrtiLAanJcVA. V M^lpuie.Dwextf RS Brrwv.Gov* Pnxter. CHICORY, PEACH, AND APRICOT RUSTS. 230 Explanation of Plates. PLATE E. (All Figures nat. size.) PUCCINIA CHRYSANTHEMI on CHRYSANTHEMUM.Fig. 21. Uredosori on under surface of leaf. PUCCINIA CALENDULAE ON MARIGOLD (Calendula officinalis). 22. Aecidia and teleutosori on under surface of leaf. 23. Uredo and teleutosori on stem. PUCCINIA HEDERACEAE on NATIVE VIOLETS. 24. Uredo and teleutosori on under surface of leaf of Viola hcderacca. 25. Aecidia on
RMMCK6E7–. Fig. m.—Gymnosporangiuni mbinae in the form of Roeslelin cancellata on leaves of Pear. A few twigs showing the abundance of aecidia over the whole tree. (v. Tubeuf phot.) isolated crystals but as masses. Cork-formation was suspended in Wakker's case, while in Fentzling's a partial formation of cork was distinguishable beneath the epidermis. The increased thickness of diseased leaves is due principally to multiplication of the spongy parenchyma, the upper layers of which frequently become more or less palisade-like. When pycnidia (spermogonia) are formed on the upper leaf-surface, the palisad
RMT1HX8E–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 FlG. l'46.—Pd-khnaiuiii piiii (corOcola). Young twig be.iring numerous aecidia. (v. Tnbeuf phot.) Fig. •lib.—Pirido-rahi.rii jtidi (rorlicola). Branch :ind lateral twigs distinctly swollen where attacked. Tliey also bear aecidia. (v. Tubeuf phot.) ring ceases to thicken, but as the mycelium seldom succeeds during the first year in killing the cambium all round a
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
RMMCK6HP–. Fig. 190.—Anemov.e-Rv.sl. 2 and 3, Normal pUmts of Anemone ranv.ncv.loid.es. 4, A'cidiuiii punctatuiii on Anemone ranuncuioides ; aecidia on the lower surface of the leaf; the plants are abnormally elongated, and the leaf-segments are smaller. 6 and 7, Pv.ccinia j'usca on Anemone nemorosa ; the plants rem lin small, 6 is completely deformed, 7 partially. 1 and 5, Aecidium lev.cosiwmum on An-mune nemorosa; the plants are abnormally elongated and the leaf-segments smaller, (v. Tubeuf del.)
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
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..
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