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Rust fungi Black & White Stock Photos
RMRE372Y–. The British rust fungi (Uredinales) their biology and classification. Rust fungi. Fig. 215. P. Arrhenathevi. a, teleutospores on Arrheiiatherum, from Hampton- in-Arden ; 6, another, and c, two abnormal ones, from Lichfield; d, a. paraphysis and uredospore from the latter. Teleutospores. Sori hypophyllous, scattered, minute, puncti- forin or shortly linear, covered by the epidermis, black; spores ellipsoid - oblong or oblong- clavate, rounded, truncate or rarely gently attenuated a- bove where they are thickened (5—10/a) and darker, hardly or not at all constricted, gen- erally attenuated dow
RMRE2G7P–. The British rust fungi (Uredinales) their biology and classification. Rust fungi. 330 OCHROPSORA ^cidiospores. ^cidia scattered pretty regularly over the lower surface of the leaves, not very crowded, shortly cylindrical, white, with torn revolute margin; spores irregularly oblong, colourless, thin- walled, very delicately verruculose, 18—30 X 15—21 /J.. [ Uredospores. Sori hypophyllous, small, roundish, scattered, not more than A mm. diam.; spore-mass grey- ish or yellowish-white, suiTounded by a circle of paraphyses, which form a kind of peridium, but their upper ends, when mature, are fre
RMRE37HR–. The British rust fungi (Uredinales) their biology and classification. Rust fungi. ON UMBELLIFERiE 185 the petioles sometimes very large, scattered or confluent, roundish, pulverulent, blackish-brown; spores ellipsoid to ob- long, rounded above, not thickened, hardly constricted, rounded or gently attenuated below, smooth, brown, 30—50 x 15—23 yu.; pedicels hyaline, thin, deciduous, about as long as the spore. On Apium graveolens. Not common, ^cidia in May and June; teleutospores September—November. Distinguished from many of its close allies by the possession of an secidium. (Fig. 132.) Dist
RMRE3772–. The British rust fungi (Uredinales) their biology and classification. Rust fungi. 256 PUCCINIA with three or four inconspicuous germ-pores; paraphyses very few or wanting. Teleutospores. Sori hypophyllous, sometimes arranged in circles round the uredo-sori, rarely scattered, occasionally con-. Fig. 195. P. Lolii. jEcidia on leaves of E. catharticus ; Teleutospores, a, on Lolium, b, on Arrhenatherum. fluent, oblong or linear, ^—1 mm. long, nearly always covered by the epidermis, black; spores as in P. coronata, but very irregular; mesospores also occur. iEcidia on Rhamnus catharticus, May and
RMRE2G2G–. The British rust fungi (Uredinales) their biology and classification. Rust fungi. 358 MELAMPSORIDIUM MELAMFSORIDIUM Klebahn. Heteroecious. ;' ' Teleutospores one-celled, with brownish membrane, united into flat waxy crusts, but each little group starts almost always directly beneath a stoma. Uredo-sori surrounded by a hemi- spherical peridium which opens by an apical pore, often begin- ning beneath a stoma; uredospores abstricted singly, more or less smooth at one end, with indistinct germ-pores, not mixed with capitate paraphyses. iEcidia with a well-developed inflated peridium. Spermogones
RMRE37CD–. The British rust fungi (Uredinales) their biology and classification. Rust fungi. ON CBASSTJLACE^ 211 Teleutospores. Sori amphigenous or on the stems, but generally hypophyllous, scattered or crowded and confluent, minute, roundish, surrounded by the torn epidermis, pulverulent, dark- brown; spores broadly ellipsoid, depressed, rounded at both ends, scarcely thickened above, not constricted, smooth, dark chest- nut-brown, 20—35 X 17—24 fi; pedicels hyaline, about as long as the spore; spores occasionally three-celled, like Triphragmium. On Sedurn Rhodiola (roseum). Very rare. Glen Callater,
RMRDE4P3–. Minnesota plant diseases. Plant diseases. 54 Minnesota Plant Diseases. individual, formed by the partnership of a fungus and certain branches of the host, and living at least partially as a parasite upon the remainder of the host plant. It behaves as does a par- asitic mistletoe plant and is not unlike it in appearance. Most of the witches'-brooms of Minnesota trees are due to rust fungi. One of the most common is the birds-nest broom upon red. Fig. 24.—Witches'-broom on white spruce, caused by a mistletoe (Razoumofskya pusilla). The spruce is badly affected. Numerous brooms are seen below a
RMRE37WA–. The British rust fungi (Uredinales) their biology and classification. Rust fungi. ON COMPOSITE 151. Pig. 103. P. Tragopogi. Teleutospores. Teleutospores. Sori amphigenous, without manifest spots, scattered, occasionally aggregated, mi- nute, punctiform, long covered by the epidermis, at length pulverulent, dark- brown; spores ellipsoid, rounded at each end, not thickened above, gently constricted, tuberculate, chestnut- brown, 26—45x18—52 fi; pedicels hyaline, short. On Tragopogon pratensis. Not uncommon. April—Sep- tember. (Fig. 103.) The mycelium arising from the infection of young plants
![. The British rust fungi (Uredinales) their biology and classification. Rust fungi. ON VERONICA 169 The secidia may be» found together with the teleutospores right up to September, often on the same spot. This species is very different from the others on Galium; the teleuto-sori, as Cooke says, are " firm and compact like little spots of pitch," and may be accompanied by swellings and distortion. There are no uredospores. Distribution : Central and Northern Europe, India, North America. 41. Puccinia Veronicae Schrot. P. Veronicae Schrot. Pilz. Schles. p. 347. Plowr. Ured. p. 211 p.p. Stock Photo](https://c8.alamy.com/comp/RE37NK/the-british-rust-fungi-uredinales-their-biology-and-classification-rust-fungi-on-veronica-169-the-secidia-may-be-found-together-with-the-teleutospores-right-up-to-september-often-on-the-same-spot-this-species-is-very-different-from-the-others-on-galium-the-teleuto-sori-as-cooke-says-are-quot-firm-and-compact-like-little-spots-of-pitchquot-and-may-be-accompanied-by-swellings-and-distortion-there-are-no-uredospores-distribution-central-and-northern-europe-india-north-america-41-puccinia-veronicae-schrot-p-veronicae-schrot-pilz-schles-p-347-plowr-ured-p-211-pp-RE37NK.jpg ". The British rust fungi (Uredinales) their biology and classification. Rust fungi. ON VERONICA 169 The secidia may be» found together with the teleutospores right up to September, often on the same spot. This species is very different from the others on Galium; the teleuto-sori, as Cooke says, are " firm and compact like little spots of pitch," and may be accompanied by swellings and distortion. There are no uredospores. Distribution : Central and Northern Europe, India, North America. 41. Puccinia Veronicae Schrot. P. Veronicae Schrot. Pilz. Schles. p. 347. Plowr. Ured. p. 211 p.p. Stock Photo")
RMRE37NK–. The British rust fungi (Uredinales) their biology and classification. Rust fungi. ON VERONICA 169 The secidia may be» found together with the teleutospores right up to September, often on the same spot. This species is very different from the others on Galium; the teleuto-sori, as Cooke says, are " firm and compact like little spots of pitch," and may be accompanied by swellings and distortion. There are no uredospores. Distribution : Central and Northern Europe, India, North America. 41. Puccinia Veronicae Schrot. P. Veronicae Schrot. Pilz. Schles. p. 347. Plowr. Ured. p. 211 p.p.
RMRE36XD–. The British rust fungi (Uredinales) their biology and classification. Rust fungi. GYMNOSPOEANGIDM 309 j^cidiospores. ^cidia hypophyllous, on the same spots, flask shaped, 1—2 mm. broad, pale-brown, split to the base into lacinise which remain united at the summit, and at first are joined at intervals by short transverse bands; spores finely verru- culose, brown, 28—30 fj. (average). Teleutospores. Spore-masses on the branches, at first pulvinate, dark- brown, then irregularly conical, 8—• 10 mm. high, red-brown, gelatinous; spores of two kinds, thick-walled and thin-walled, broadly and obtus
RMRE3825–. The British rust fungi (Uredinales) their biology and classification. Rust fungi. ON LILIACEiE 121 running from apex to base, evenly coloured, brown, 18—32 x 14—22 yu.; epispore uniformly thin, about l^fj. thick; pedicels hyaline, often deciduous, as long as or longer than the spore. On leaves of Endymion non-scripturn {Scilla nutans), and also of Scilla bifolia, S. campanulata. Common. April—June. (Fig. 72.) The yellow spots and the concentric arrangement of the sori are often very marked. The mycelium is purely local. A few finely echinulate uredospores, 27 x 20 fi,, were found by Juel in
![. The British rust fungi (Uredinales) their biology and classification. Rust fungi. Fig. 51. V. Fabae. Telento- spores and uredospore on Vicia septum.. "biological" races—(1) on Faba vulgaris and Pisum sativum, (2) on Lathynis vernus and probably also on Piswm sativum, (.3) on Vicia Cracca, Pisum sativum, and possibly also Vicia hirsata. The SBcidial generation is frequent on some ho.sts, such as Vicia sepium and species of Lathyrus. On Faba vulgaris and Pisum sativum it is, on the contrary, very rare, being recorded by Sydow, on the Pea, only from Norway, East Indies and Japan (once Stock Photo](https://c8.alamy.com/comp/RE3859/the-british-rust-fungi-uredinales-their-biology-and-classification-rust-fungi-fig-51-v-fabae-telento-spores-and-uredospore-on-vicia-septum-quotbiologicalquot-races1-on-faba-vulgaris-and-pisum-sativum-2-on-lathynis-vernus-and-probably-also-on-piswm-sativum-3-on-vicia-cracca-pisum-sativum-and-possibly-also-vicia-hirsata-the-sbcidial-generation-is-frequent-on-some-hosts-such-as-vicia-sepium-and-species-of-lathyrus-on-faba-vulgaris-and-pisum-sativum-it-is-on-the-contrary-very-rare-being-recorded-by-sydow-on-the-pea-only-from-norway-east-indies-and-japan-once-RE3859.jpg ". The British rust fungi (Uredinales) their biology and classification. Rust fungi. Fig. 51. V. Fabae. Telento- spores and uredospore on Vicia septum.. "biological" races—(1) on Faba vulgaris and Pisum sativum, (2) on Lathynis vernus and probably also on Piswm sativum, (.3) on Vicia Cracca, Pisum sativum, and possibly also Vicia hirsata. The SBcidial generation is frequent on some ho.sts, such as Vicia sepium and species of Lathyrus. On Faba vulgaris and Pisum sativum it is, on the contrary, very rare, being recorded by Sydow, on the Pea, only from Norway, East Indies and Japan (once Stock Photo")
RMRE3859–. The British rust fungi (Uredinales) their biology and classification. Rust fungi. Fig. 51. V. Fabae. Telento- spores and uredospore on Vicia septum.. "biological" races—(1) on Faba vulgaris and Pisum sativum, (2) on Lathynis vernus and probably also on Piswm sativum, (.3) on Vicia Cracca, Pisum sativum, and possibly also Vicia hirsata. The SBcidial generation is frequent on some ho.sts, such as Vicia sepium and species of Lathyrus. On Faba vulgaris and Pisum sativum it is, on the contrary, very rare, being recorded by Sydow, on the Pea, only from Norway, East Indies and Japan (once
![. The British rust fungi (Uredinales) their biology and classification. Rust fungi. PUCCINIASTRUM 365 Fig. 272. P. Agrimoniae. Uredospores. spores shortly ellipsoid or obovate, echinulate, orange, 18—21 x 14 ya; epispore rather thick, with indistinct germ-pores. [Teleutospores. Sori similar, but indefinite, clear-brown; spores subepidermal, extracellular, cuneate, smooth, each divided into four cells by two longitudinal walls at right angles to one another, 30 x 21—30/*.] On Agrimonia Eupatoria. Uredospores common, July— September; teleutospores, very rare everywhere, not yet found in Britain. Stock Photo](https://c8.alamy.com/comp/RE2G11/the-british-rust-fungi-uredinales-their-biology-and-classification-rust-fungi-pucciniastrum-365-fig-272-p-agrimoniae-uredospores-spores-shortly-ellipsoid-or-obovate-echinulate-orange-1821-x-14-ya-epispore-rather-thick-with-indistinct-germ-pores-teleutospores-sori-similar-but-indefinite-clear-brown-spores-subepidermal-extracellular-cuneate-smooth-each-divided-into-four-cells-by-two-longitudinal-walls-at-right-angles-to-one-another-30-x-2130-on-agrimonia-eupatoria-uredospores-common-july-september-teleutospores-very-rare-everywhere-not-yet-found-in-britain-RE2G11.jpg ". The British rust fungi (Uredinales) their biology and classification. Rust fungi. PUCCINIASTRUM 365 Fig. 272. P. Agrimoniae. Uredospores. spores shortly ellipsoid or obovate, echinulate, orange, 18—21 x 14 ya; epispore rather thick, with indistinct germ-pores. [Teleutospores. Sori similar, but indefinite, clear-brown; spores subepidermal, extracellular, cuneate, smooth, each divided into four cells by two longitudinal walls at right angles to one another, 30 x 21—30/*.] On Agrimonia Eupatoria. Uredospores common, July— September; teleutospores, very rare everywhere, not yet found in Britain. Stock Photo")
RMRE2G11–. The British rust fungi (Uredinales) their biology and classification. Rust fungi. PUCCINIASTRUM 365 Fig. 272. P. Agrimoniae. Uredospores. spores shortly ellipsoid or obovate, echinulate, orange, 18—21 x 14 ya; epispore rather thick, with indistinct germ-pores. [Teleutospores. Sori similar, but indefinite, clear-brown; spores subepidermal, extracellular, cuneate, smooth, each divided into four cells by two longitudinal walls at right angles to one another, 30 x 21—30/*.] On Agrimonia Eupatoria. Uredospores common, July— September; teleutospores, very rare everywhere, not yet found in Britain.
RMRE383D–. The British rust fungi (Uredinales) their biology and classification. Rust fungi. ON CAKYOPHYLLACE^ 111 fivst generation, and their mycelium can produce either secidiospores or teleutospores or both. No spermogones seem to be known. The seoidium requires to be carefully distinguished from that of Piwcinia Behenis {P. Silenes) (q.v.), which i.s much rarer and does not extend throughout the season. Distribution ; Europe generally. 23. Uromyces sparsus Lev. Uromyces sparsus Lev. Ann. Sci. Nat. ser. 3, viii. 369. Cooke, Handb. p. 519 ; Micr. Fung. p. 214. Plowr. Ured. p. 136. Sacc. Syll. vii. 54
RMRDE29R–. A text-book of mycology and plant pathology . Plant diseases; Fungi in agriculture; Plant diseases; Fungi. RUST FUNGI 211 teliospores appear on irregular spheric swellings or excrescence on Juniperus virginiana. The mycelium of G. juniperi-virginiance is annual, or biennial, producing globose swellings known as cedar apples on the leaves of the. Fig. 8i.—Magnified view of apple rust roestelia, or aecia. {After Jones and Bartholomew, Bull. 257, Agric. Exper. Stal. Univ. Wise, July, 1915.) red cedar, Juniperus virginiana. The cluster cups appear on the leaves of native species of apples {Malus
RMRE3820–. The British rust fungi (Uredinales) their biology and classification. Rust fungi. ON JUNCACEjE 123 is to remove carefully and bum all diseased leaves before they mature their spores. The fungus is stated to have attacked the foliage of the host for three successive seasons, completely destroying it, and although for the first two seasons it did not attack other species of ColcMcum growing near, during the third season it spread to G. awlumnale and C. havancum. 35. Uromyces Junci Tul. u^ddium zonale Duby, Bot. Gall. ii. 906. Cooke, Grevillea, xiv. 39. Uromyces Junci Tul. Ann. Sci. Nat. ser. 4
RMRE2G95–. The British rust fungi (Uredinales) their biology and classification. Rust fungi. 324 COLEOSPORIUM Uredospores. Sori scattered, orange, at first covered by the epidermis, soon pulverulent; spores ovate or ellipsoid, densely and evenly verruculose, 21—34 x 14—21 /u,. Teleutospores. Sori forming little red crusts; spores pris- matic, length up to 100 fi, breadth 18—24 fj,; epispore up to 14/u. thick at the summit. iEcidia on leaves of Pinus silvestris; uredo- and teleutospores on Petasites officinalis, August—November, not uncommon. The life-cycle has been demonstrated by Fischer and Wagner fo
RMRE37JP–. The British rust fungi (Uredinales) their biology and classification. Rust fungi. 182 PUCCINIA Teleutospores. A. Fig. 130. P. HydrocotyUs. Teleutospore and uredospore. very few are found in the uredo-sori, ellipsoid to oblong, rounded at both ends, hardly thickened above, gently constricted, smooth, brown, 30—44 x 18 —28fi; pedicels hyaline, thin, deciduous. On Hydrocotyle vulgaris. Rare: Kew Gardens; Epping Forest; Ireland, Co. Dublin. Uredospores, July—Sep- tember; teleutospores, October. (Fig. 130.) This species ia very imperfectly known. The secidium is recorded only from South America ;
RMRE1WP6–. The British rust fungi (Uredinales) their biology and classification. Rust fungi. 266 PUCCINIA on A. flexuosa have no paraphyses, as those on A. caespitosa, have, but otherwise they are almost identical and are undoubt- edly P. dispersa (sens. lat.). I find similar spores on A. caes- pitosa round Birmingham, and have a specimen on the same host sent by the late H. T. Soppitt from Saltaire; this latter is the plant referred to in a note to P. Baryi (Plowr. Ured. p. 192)—both these have abundant paraphyses with the uredo- spores. Herr H. Sydow informs me that he considers the presence or absen
RMRE383A–. The British rust fungi (Uredinales) their biology and classification. Rust fungi. 112 UROMYCES ^cidiospores. iEcidia amphigenous, clustered in circles 5— 10 mm. diam., cylindrical, whitish, margin deeply torn; spores delicately verruculose, yellow, 18—22 fi diam. Uredospores. Sori amphigenous, scattered or gregarious, round or more frequently elongate, small, surrounded by the j;onspicuous^torn epi- dermis, ciiinamon; spores globose to oval or^Hong, delicately and sparingly echinu- late, yellowish-brown, 18—25x16—21/i; epispore about 1^ fi thick. Teleutospores. Sori amphigenous but mostly ca
RMRE371H–. The British rust fungi (Uredinales) their biology and classification. Rust fungi. 296 PHRAGMIDIUM Uredospores. Sori yellow, roundish, often confluent, pul- verulent; spores ellipsoid to ovate, distantly verruculose, yellow, 28—32 X 21—24 /x. Teleutospores. Sori hypophyllous, large, roundish, thick, pulvinate, black, on conspicuous purple-bordered spots; spores. Fig. 224. Ph. violaceum. a, secidiospore; 6, uredospore; c, outlines of various mature teleutospores from the same sorus; d, young teleutospore before the middle coat is fully developed, showing the fusion-nucleus in each cell, and th
RMRE380P–. The British rust fungi (Uredinales) their biology and classification. Rust fungi. 132 PUCCINIA Fig. 83. P. Ghry- santhemi. Ure- dospore (Brit- ish). delicately pedicels thick, hyaline Uredospores. Sori generally hypophyllous, on irregular pallid-yellow or brownish spots, scattered or in clusters, about 1—1| mm. diam. often circi- nate, pulverulent, snufif-brown; spores globose to ellipsoid, delicately echinulate, brown, 24— 52 X 17—27 fj,, mostly with three germ-pores. [Teleutospores. Mixed with the uredospores, oblong or ellipsoid, rounded and slightly thickened above, usually rounded or so
RMRE3802–. The British rust fungi (Uredinales) their biology and classification. Rust fungi. 136 PUCCINIA Formerly united with Pucdnia Absinthii, from which it is distinguished by its (on the average) narrower and shorter teleutospores, with longer pedicels. I could not see in any case that the teleutospores were verru- culose, as they are said to be. Distribution : North-western and Central Europe. 8. Puccinia expansa Link. Pucdnia expansa Link, Sp. PI. vi. 2, p. 75. Sydow, Monogr. i. 146. Fischer, Ured. Schweiz, p. 182, f. 141—2. P. Senecionis Cooke, Micr. Fung. p. 207. Plowr. Ured. p. 209, (non Lib.
RMRE3720–. The British rust fungi (Uredinales) their biology and classification. Rust fungi. 292 EHRAGMIDIUM black; spores cylindrical or subclavate, of 3—6 cells (occasionally one or two), rounded or bluntly papillate at the apex, hardly constricted, smooth, brown, 42—80 x 20—28 /x; two or three germ-pores to each cell; pedicels thick, hyaline, persistent, as long as or much longer than the spores (100—150 /t). On Potentilla argentea, P verna, and various cultivated species. April—September. Not common. (Fig. 220.) This species is more closely allied to P. Sanguisorbae than to P. Fragariastri. The fin
RMRE2FXF–. The British rust fungi (Uredinales) their biology and classification. Rust fungi. APPENDIX HEMILBIA Berk, et Broome. ^cidia, if any, unknown. Uredospores borne singly on hyphae which protrude in fascicles through a stoma. Teleuto- spores formed later on pedicels in the centre of the same fascicles, one-celled, with apical germ-pore, germinating as in Uromyces. The character given for Hemileia, when only H. vastatrix was known, of having one side of the uredospore smooth, is now known to be not of universal application. Hemileia americana Mass. Hemileia americana Mass. in Gard. Chron. 1905, x
RMRE36Y5–. The British rust fungi (Uredinales) their biology and classification. Rust fungi. GYMNOSPORANGIUM 305 JEcidiospores. iEcidia clustered on yellow or orange thick- ened spots on the leaves, fruits, and stems, cylindrical, up to. Fig. 230. G. clavariaeforme, .^cidia (Eoeatelia) on leaf, fruit and branch of Hawthorn (reduced); a, peridium x 16. The fruit and gall on branch are shown as tliey appear when the peridia are old and the mass looks some- what like a honey-comb. 2| mm. high, fimbriate above, at length lacerate to base, pale- brown ; spores verruculose, brownish, about 28—30 fi; pores 8—
RMRE37BW–. The British rust fungi (Uredinales) their biology and classification. Rust fungi. The markings on the teleutospores are perfectly invisible when wet. This species has no connection with Caeoma Saxifragae which is also found on S. granulata. I have specimens from both Scotland and Ireland, the latter on S. umbrosa from Clare Island, and the former on S. stellaris from Lochnagar. Fig. 160. P. Saxifragae. Te- leutospores, u, on S. umbrosa (Ireland), b, on S. stellaris (Lochnagar). Distribution : Central and Western Europe. 84. Puccinia Pazschkei Dietel. P^iccinia Pazschkei Diet, in Hedwig. 1891
RMRE1WNW–. The British rust fungi (Uredinales) their biology and classification. Rust fungi. ON GRAMINE^ 271. Fig. 206. P. perplexans. Teleutospores. Uredospores. Sori amphigenous, scattered, roundish, ob- long or linear, occasionally con- fluent, minute, yellow-brown; spores globose to ovate, faintly •echinulate, yellow, 20—28 /a diatn. (with 4—6 scattered germ-pores on one face, McAl- pine). Teleutospores. Sori amphi- genous, scattered, occasionally confluent, minute, generally oblong or linear, about 1—1|- mm. long, always covered by the epidermis, black; spores variable, generally oblong to clavate
RMRE37WP–. The British rust fungi (Uredinales) their biology and classification. Rust fungi. ON COMPOSITiE 149 On Hypochoeris radicata. Not uncommon. July—Sep- tember. The records from other countries include all the three British species of Hypochoeris. Only uredospores were seen in British specimens. (Figs. 100, 101.). Pig. 100. P. Hypoclioeridii. Uredospore (Britisli) on H. radicata. Fig. 101. P. Hypochoeridis. Teleuto- Bpores and uredospore, on H. glabra (Berlin, ex herb. Sydow). This species, which has been often stated to be a Brachypucoinia, differs from most others of the type of P. Hieracii in
RMRE2G9Y–. The British rust fungi (Uredinales) their biology and classification. Rust fungi. COLEOSPORIUM 321 j^cidia on (? one of the two) leaves of Pinus austriaca, P silvestris, May, June; uredo- and teleutospores on Senecio Jacohaea, S. palustris, S. silvaticus, S. viscosus, S. vulgaris, all through the year; also recorded for S. pulcher, S. sarracenious, etc., in Botanic gardens, and on cultivated Cinerarias (i.e. Senecio) at Sydenham; see Journ. Roy. Hort. Soc. 1908, xxxiii. 511. Very common. (Figs. 241, 242.). Please note that these images are extracted from scanned page images that may have bee
RMRE37MJ–. The British rust fungi (Uredinales) their biology and classification. Rust fungi. 174 PUCCINIA On leaves, petioles and stems of Glechoma hederacea {Nepeta Glechoma). June—October. Not uncommon. (Fig. 123.) The sori are especially large, round and compact late in the season, when they produce spores which are darker and will not germinate immediately (as the others do), but only after the winter's rest. I have a specimen, resembling this species, on Prunella vulgaris from Sutton Park, Warwicks. ; Plowright mentions a similar one from Ben Lawers {I.e. p. 215). Distribution : Europe, Siberia, J
RMRE38E1–. The British rust fungi (Uredinales) their biology and classification. Rust fungi. GERMINATION OF iECIDIOSPORES 7 tapping are mature enough to germinate, and even they, owing to their thin walls, may lose this power in a few days according to circumstances. Especially can they be killed by rapid. Fig. 5. P. Caricis. a, three cells of the peridlum, on Nettle ; b, a cell in optical section; c, the same in surface-view ; d, two aeeidiospores. x 600. drying. Instances are known, however, where some of them, kept in a cool place, retained their capacity for germination about seventy days, though m
RMRE37RH–. The British rust fungi (Uredinales) their biology and classification. Rust fungi. ON CAMPANULACEiE 159 cinnamon; spores globose to ellipsoid, echinulate, yellow-brown, 24—29 X 16—25 jjl,, with two germ-pores. Teleutospores. Sori similar and often on the stems, but dark-brown; spores ellipsoid or somewhat ovate, rounded and not thickened above, scarcely constricted, usually rounded below, very delicately verruculose, brown, 25—40 X 16—24 fi; epispore thin; pedi- cels hyaline, usually very short. ^.^ ^^, ^ ^.^^^^.. On leaves and stalks of Hieracium, Teleutospores. H. boreale, H. murorum, H. Pi
RMRE372D–. The British rust fungi (Uredinales) their biology and classification. Rust fungi. 288 TEIPHEAGMIUM Spermogmes. On the leaves and petioles, circinate, flat, yellowish. Uredospores. Sori of two kinds—primary, i.e. ceeomata, amphigenous, large, expanded, bright-orange, mostly on the veins and petioles where they cause distortion, without para- physes; secon&rt/, hypophyllous, small, round, scattered, orange, surrounded by paraphyses; spores brilliant-orange, ellipsoid to obovate, verrucose, 25—28 x 18—21/i, without evident germ- pores.. Fig. 218. T. Ulmariae. Normal teleiitospore; a and 6,
RMRDE2AY–. A text-book of mycology and plant pathology . Plant diseases; Fungi in agriculture; Plant diseases; Fungi. RUST FUNGI 207. Fig. 77.—Longitudinal section of a partly gelatinous teliosortis after the exten- sion of the tentacles. {After Reed. H. S., and Crabill, C. H., Techn. Bull. 9, Va. Agric. Exper. Slat., May, 1915.). Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.. Harshberger, John W. (John William), 1869-1929. Philade
RMRE370B–. The British rust fungi (Uredinales) their biology and classification. Rust fungi. 302 XENODOCHUS. Spermogones. Epiphyllous, in little groups. Uredospores. Sori of two kinds, primary epiphyllous, sur- rounding the spermogones, secon- dary hypophyllous, scattered, small, round, punctiform, orange, sur- rounded byafewclavate paraphyses; spores spherical to obovate, finely echinulate, reddish-orange, 20— 23 X 14—20 fi. Teleutospores. Sori hypophyl- lous, similar, but bright-brown; spores cylindrical, fusiform or cla- vate, of 2—7 (mostly five) cells, often curved, thickened at the apex like many
RMRE37DG–. The British rust fungi (Uredinales) their biology and classification. Rust fungi. 206 PUCCINIA oblong to clavate, rounded above and not thickened, evidently constricted, usually attenuated below, smooth, brown, 55—90 x 20—36 /u. (or even 100 jjl long); pedicels hyaline, per- sistent, very long, (reaching 160 /i). On Buxus sempervirens. Rather common. September, October, lasting through the winter and following spring. (Fig. 153.) The spores of this species easily fall apart into their component cells. Ed. Fischer proved that it has only the one spore-form : he gives (I.e.) figures showing th
RMRE2G7C–. The British rust fungi (Uredinales) their biology and classification. Rust fungi. Fig. 248. 0. Sorbi. Jicid- ium leucospermum. a, aecidia on leaf of A. nemorosa, nat. size; 6, the same, x 2 ; u, secidiospores, x 600.. Fig. 249. 0. Sorbi. Section of teleuto-sorus, before tlie division of the spores into four cells (one spore is shaded); «,, basidiospores. (After Fischer.) Teleutospores. Sori hypophyllous, ^—^ mm. diam., at first covered by the epidermis, pustulate, pale flesh-colour, roundish or oblong, clustered in groups; spores cylindrical, rounded above, crowded, grey, granular, subopaque
RMRE3867–. The British rust fungi (Uredinales) their biology and classification. Rust fungi. 94 UEOMYCES including all the British species, but I have seen no specimens on these from this country. The teleutospores on T. minus which I have observed are more distinctly verrucose and less striated than in the figures given by Fischer, and may possibly not belong to the same species. Distribution: Europe, North and South Americta, East Indies. 9. Uromyces Loti Blytt. Uromyces Loti Blytt, Christ. Vidensk.-Selskabs Forhandl. 1896, p. 37. Sydow, Monogr. ii. 110. Grove, Journ. Hot. 1911, p. 367. U. Euphorbioi
RMRE1WR0–. The British rust fungi (Uredinales) their biology and classification. Rust fungi. ON GEAMINEiE 259 On leaves, culms and glumes of Agropyron caninum, A. repens, Brachypodium sylvaticum, Bromus mollis and other species, Elymus arenarius, Hordeum vulgare, Secale Cereale,. Fig. 197. p. fflumarum. a, uredo-sori and b, teleuto-sori, on leaves, nat. size; c, teleuto-sori, on glume ; d, uredospore ; e, teleutospore. Triticum vulgare. It is one of the few species that attack the ears, to which it does serious damage. (Fig. 197.') This is one of two forms originally included under the collective name
RMRE384X–. The British rust fungi (Uredinales) their biology and classification. Rust fungi. ON LEGUMINOS^E 101 belong to U. Pid has been proved by Jordi to be confined to that species and not to bo transmissible to Pisum sativum or Lathyrus. It has been named by Magnus XJ. Fimheri-Eduardi, but is not known as British. Distribution : Europe generally; North America less commonly. 15. Uromyces Phaseolorum De Bary. jEcidium Phaseolorum Wall. Fl. Crypt. Germ. ii. 256. Credo appendiculata var. Phaseoli Pers. Syn. p. 222. Uro7nyees Phaseolorum De Bary, Ann. Sci. Nat. ser. 4, xx. 80 (1863). Cooke, Grevillea,
![. The British rust fungi (Uredinales) their biology and classification. Rust fungi. ON COMPOSITE 157 ^cidiospores. ^cidia hypophyllous, evenly spread over the whole leaf-surface, flat, with white margia; spores delicately verruculose, yellowish, 15—25 x 14—20 fj..] Uredospores. Sori amphigenous, minute, roundish, scat- tered, surrounded by the epidermis, cin- namon; spores globose to ovoid, delicately aculeate, brown, 20—24 x 16—20 /j,, with two or three germ-pores. Teleutospores. Sori hypophyllous, rarely also epiphyllous, minute, long covered by the epidermis,blackish-brown; Fig. 108. P. Cre Stock Photo](https://c8.alamy.com/comp/RE37TF/the-british-rust-fungi-uredinales-their-biology-and-classification-rust-fungi-on-composite-157-cidiospores-cidia-hypophyllous-evenly-spread-over-the-whole-leaf-surface-flat-with-white-margia-spores-delicately-verruculose-yellowish-1525-x-1420-fj-uredospores-sori-amphigenous-minute-roundish-scat-tered-surrounded-by-the-epidermis-cin-namon-spores-globose-to-ovoid-delicately-aculeate-brown-2024-x-1620-j-with-two-or-three-germ-pores-teleutospores-sori-hypophyllous-rarely-also-epiphyllous-minute-long-covered-by-the-epidermisblackish-brown-fig-108-p-cre-RE37TF.jpg ". The British rust fungi (Uredinales) their biology and classification. Rust fungi. ON COMPOSITE 157 ^cidiospores. ^cidia hypophyllous, evenly spread over the whole leaf-surface, flat, with white margia; spores delicately verruculose, yellowish, 15—25 x 14—20 fj..] Uredospores. Sori amphigenous, minute, roundish, scat- tered, surrounded by the epidermis, cin- namon; spores globose to ovoid, delicately aculeate, brown, 20—24 x 16—20 /j,, with two or three germ-pores. Teleutospores. Sori hypophyllous, rarely also epiphyllous, minute, long covered by the epidermis,blackish-brown; Fig. 108. P. Cre Stock Photo")
RMRE37TF–. The British rust fungi (Uredinales) their biology and classification. Rust fungi. ON COMPOSITE 157 ^cidiospores. ^cidia hypophyllous, evenly spread over the whole leaf-surface, flat, with white margia; spores delicately verruculose, yellowish, 15—25 x 14—20 fj..] Uredospores. Sori amphigenous, minute, roundish, scat- tered, surrounded by the epidermis, cin- namon; spores globose to ovoid, delicately aculeate, brown, 20—24 x 16—20 /j,, with two or three germ-pores. Teleutospores. Sori hypophyllous, rarely also epiphyllous, minute, long covered by the epidermis,blackish-brown; Fig. 108. P. Cre
RMRDFE3G–. Manual of tree diseases . Trees. CEDAR DISEASES 131 by a ground fire. The same disease affects similarly spruce, fir, juniper, arbor-vitse and hemlock. It is described under spruce diseases, on page 317.. Fig. 16. — Brown felt-blight on inceusa cedar. Eastern Witches'-Bkoom Caused by Gymnosporangium myricaium (Schw.) Fromme Witches'-brooms are found on white cedar along the At- lantic Coast from Massachusetts to Delaware and in northern Florida and southern Alabama. The witches'-broom and branch-swelling diseases, both caused by similar rust-fungi,. Please note that these images are extracte
RMRE2G27–. The British rust fungi (Uredinales) their biology and classification. Rust fungi. MELAMPSORIDIUM 359 spores roundish, 14—21x11—16/i,echinulate; epispore thinner and smoother above. Uredospores. Sori hypophyllous, with yellow spots showing on the upper side, collected in groups and mostly limited by the veins, each sorus scarcely Jj mm. wide, surrounded by a dome-shaped peridium which at length opens at the summit (where its cells are drawn out into long sharp points, Fischer); spores decidedly oblong or subclavate, orange, 22—40 x 8—12 /j,; epispore colourless, with distant spines, often smo
RMRDEXK0–. Minnesota plant diseases. Plant diseases. Minnesota Plant Diseases. 159 Rusts (UredinecB). The rust fungi constitute a larger group of plants than the smuts and exhibit more variety of structure and habit. They may be considered as relatives of the smuts in that the winter spores of the latter may be compared with. Fig. 73.—Spores of rust fungi. 1. A cluster of winter spores of wheat rust (Puccinia graminis) on wheat plant. 2. A winter spore germinating to a thread of four cells (promycelium—basidium), each of which bears a small spore (sporidium) on a stalk. The winter spore germinates in t
RMRE3845–. The British rust fungi (Uredinales) their biology and classification. Rust fungi. 104 UROMYCES Teleutospores. Sori similar, but less pulverulent, and blackish-brown; spores subglobose to ovate, not thickened above, but with a hyaline papilla as much as 6 /i high, smooth, brown, 22â35x18â25/J,; pedicels short, hyaline, deciduous. â. , TT r, â â On Geranium dissectum, G. molle, G. Fig. 57. U. Geranii. Teleutospoyes on G. pratense, G. pyrenaicum, G. silvaticinn. SI va icuni. -^^^ common. ^Ecidia, March to June; teleutospores, JuneâOctober. (Fig. 57.) Liro proved that the secidium of this paras
RMRE383J–. The British rust fungi (Uredinales) their biology and classification. Rust fungi. 110 UKOMYCES clusters, cup-shaped, whitish-yellow, with a torn revolute margin; spores densely and minutely verruculose, yellowish, 15—21 /u- diam.. Fig. 62. U. Behenis. a, secidia on early leaf, 6, fficidia on later leaf, of S. infiata ; two teleiitospores. Teleutospores. Sori hypophyllous and on the stems, often surrounding the secondary secidia, irregularly scattered, gre- garious or circinate, rounded or oblong, covered for a considerable time by the lead-coloured epidermis, rather small and compact, browni
RMRE378N–. The British rust fungi (Uredinales) their biology and classification. Rust fungi. ON JUNCACE^ 237 spores ellipsoid to ovate, echinulate, pale-brown, 18—26 x 15— 22 /i ; epispore rather thick, with two germ-pores. Teleutospores. Sori similar, but compact, pulvinate, covered or surrounded by the cleft epidermis, blackish-brown; spores. Fig. 183. p. ohscura. Teleutospores ; two mesospores, one germinated in the sorus; and two uredospores ; all on L. cavipestris. oblong, rounded, rarely truncate or conical above and thickened (5—9 /i), gently constricted, usually attenuated below, smooth,, brown
RMRE37AM–. The British rust fungi (Uredinales) their biology and classification. Rust fungi. ON CARYOPHYLLACEiE 219 P. Spergulae DC. ; Cooke, Micr. Fung. p. 210. Sydow, Monogr. i. 560. P. Moehringiae Fckl. ; Cooke, Micr. Fung. p. 210. Teleutospores. Sori hypophyllous or rarely on the stems, scattered or circinate, on pale spots, sometimes confluent, pulvinate, pallid-brown, then darker, greyish-pulverulent from the numerous basidiospores; spores oblong-fusoid or clavate.. Fig. 167. P. Lychnidearum. Teleutospores, on Lychnis diurna.. Please note that these images are extracted from scanned page images t
RMRE377H–. The British rust fungi (Uredinales) their biology and classification. Rust fungi. ON CYPERACE^ 247 downwards, smooth, brown, darker at the apex, 45—80 x 18— 22 fjb; pedicels brownish-yellow, persistent, 25—40 fi long. iEcidia on Senecio Jacobaea, May and June; uredo- and teleutospores on Carex arenaria, July—May. Rare; Norfolk, Lincolnshire, Aberdeen, Burntisland. (Fig. 190.) The life-history of this parasite was investigated by Plowright, who at the same time demonstrated by his experimental cultures its distinctness from Puceinia Garicis and P. arenariicola. Fischer records {I.e.) an seoid
RMRE36X6–. The British rust fungi (Uredinales) their biology and classification. Rust fungi. CHRYSOMYXA 311 Picea excelsa in the North of Europe and has its uredo- and teleutospores on Ledum palustre, on which it produces witches'- brooms. See Klebahn, Wirts. Eost. p. 391. It is named by Tranzschel Ghrysomyxa Woronini. Quite recently also Ghrysomyxa Rhododendri has been detected in Scotland by Mr D. A. Boyd. See Appendix. 1. Chrysomyxa Empetri Schrot. Uredo Empetri Pers. ; Cooke, Handb. p. 527 ; Mior. Fung. p. 216. Ghrysomyxa Empetri Sohrot. Krypt. Flor. Schles. iii. .372. Plowr. Ured. p. 253. Saoc. Sy
RMRE37AH–. The British rust fungi (Uredinales) their biology and classification. Rust fungi. Fig. 167. P. Lychnidearum. Teleutospores, on Lychnis diurna.. Fig. 168. P. Lychnidearum. Teleutospores, on Arenaria trinervis. rounded or somewhat pointed above and more or less thickened (up to 10 /i), gently constricted, rounded or attenuated below, smooth, yellowish-brown, 30—50 x 10—20 fi; pedicels hyaline, persistent, 60—85 /t long. On various CaryophyllaceEe, such as Dianthus barbatus, Lychnis diurna, L. vespertina, Arenaria trinervis, Gypsophila elegans, Sagina nodosa{'?), Spergula arvensis(1), Stellaria
RMRE37RE–. The British rust fungi (Uredinales) their biology and classification. Rust fungi. 160 PUCCINIA Teleutospores. Sori hypophyllous, rarely epiphyllous, often on the petioles and stems, scattered or circi- nate, minute, sometimes (especially on the stems) confluent and larger, long covered by the epidermis, then surrounded by it, round- ish or irregular, ferruginous-brown; spores ellipsoid or oblong, rounded and not thick- Fig. 111. P Gam- gng(j above, but with a pale papilla to each panulae. Teleuto- ' . jr jr r spores, on C. ro- germ-pore, constricted, rounded or somewhat tun ijo la. attenuate
RMRE379Y–. The British rust fungi (Uredinales) their biology and classification. Rust fungi. 224 pucciNiA Distribution : Central and Northern Europe, Siberia, North America. 94. Puccinia Oxyriae Fckl. Puccinia Oxyriae Fckl. Symb. Nacht. iii. 14. Oooke, Grevillea, xi. 15. Plowr. Ured. p. 194. Sacc. Syll. vii. 642. Sydow, Monogr. i. 567. Fischer, Ured. Schweiz, p. 135, f. 102. JJredospores. Sori amphigenous, generally hypophyllous, on minute purplish spots, scattered or aggregated, rounded, sometimes confluent, surrounded by the cleft epidermis, cinna- mon; spores globose to ovate, delicately echinulate,
![. The first principles of agriculture [microform]. Agriculture; Agriculture. DISEASES OF CROPS. 107 ito ed but ds Ito the atmosphere, as shown in P^igure 20. The growth of these fungi in wheat, barley, etc., is so rapid and vigorous that they soon split the straw, after which the disease spreads so quickly that whole fields of grain are often destroyed in a lew days. Rain and sud- den changes of temperature, ac- companied by close, warm wea- ther, are specially favorable to the growth of rust fungi. Over-rich- ness of soil also,. Fig. 20.—Section through a pustule of rust, enlarged to 2CXD tim Stock Photo](https://c8.alamy.com/comp/RJ229K/the-first-principles-of-agriculture-microform-agriculture-agriculture-diseases-of-crops-107-ito-ed-but-ds-ito-the-atmosphere-as-shown-in-pigure-20-the-growth-of-these-fungi-in-wheat-barley-etc-is-so-rapid-and-vigorous-that-they-soon-split-the-straw-after-which-the-disease-spreads-so-quickly-that-whole-fields-of-grain-are-often-destroyed-in-a-lew-days-rain-and-sud-den-changes-of-temperature-ac-companied-by-close-warm-wea-ther-are-specially-favorable-to-the-growth-of-rust-fungi-over-rich-ness-of-soil-also-fig-20section-through-a-pustule-of-rust-enlarged-to-2cxd-tim-RJ229K.jpg ". The first principles of agriculture [microform]. Agriculture; Agriculture. DISEASES OF CROPS. 107 ito ed but ds Ito the atmosphere, as shown in P^igure 20. The growth of these fungi in wheat, barley, etc., is so rapid and vigorous that they soon split the straw, after which the disease spreads so quickly that whole fields of grain are often destroyed in a lew days. Rain and sud- den changes of temperature, ac- companied by close, warm wea- ther, are specially favorable to the growth of rust fungi. Over-rich- ness of soil also,. Fig. 20.—Section through a pustule of rust, enlarged to 2CXD tim Stock Photo")
RMRJ229K–. The first principles of agriculture [microform]. Agriculture; Agriculture. DISEASES OF CROPS. 107 ito ed but ds Ito the atmosphere, as shown in P^igure 20. The growth of these fungi in wheat, barley, etc., is so rapid and vigorous that they soon split the straw, after which the disease spreads so quickly that whole fields of grain are often destroyed in a lew days. Rain and sud- den changes of temperature, ac- companied by close, warm wea- ther, are specially favorable to the growth of rust fungi. Over-rich- ness of soil also,. Fig. 20.—Section through a pustule of rust, enlarged to 2CXD tim
RMRE2G71–. The British rust fungi (Uredinales) their biology and classification. Rust fungi. 334 ENDOPHYLLUM Teleutospores. Sori hypophyllous, or occasionally epiphyllous, more or less covering the whole surface, crowded, secidium-like, sunk in the leaf-tissue which is slightly swollen, surrounded by a thin peridium in the shape of a shallow cup, with a short,. Fig. 251. -E. Euphoriiae-silvaticae. a, affected leaf of E. amygdaloides, nat. size; 6, a3oidio-teleutospore; c, germihating spore ; d, another, not so advanced, x 540; e, inner, and /, outer wall of peridium-cell, x 600. torn, slightly revolute
RMRE380X–. The British rust fungi (Uredinales) their biology and classification. Rust fungi. ON COMPOSITE 131 the epidermis and resemble rather a Dothidea or Asteroina than a Fuccinia. The spores bear a slight resemblance to those of P. Poarum, but are more fusiform, and much more thickened at the apex. Mixed with them are sometimes a number of mesospores. Distribution : Europe, except the southern parts. 3. Puccinia Millefolii Fckl. Pucdnia MUlefolii Fckl. Symb. Myc. p. 55. Cooke, Micr. Fung. p. 207. Plowr. Ured. p. 215. Sydow, Monogr. i. 2. Fischer, Ured. Sohweiz, p. 296, f. 216. indistinct spots,. F
RMRE387D–. The British rust fungi (Uredinales) their biology and classification. Rust fungi. 88 jE(^MYCES is one of the species in which it is stated (Dietel, Flora, 1895, Ixxxi. 396), that the secidiospores can reproduce the secidia. Spermogones are found sparingly only with the first generation of the secidia and at the same time. The secondary secidiospores, in fact, take the place of uredospores. Distribution : Europe generally. 3. Uromyces Limonii L6v. JEcidmm Statices Desm.; Cooke, Micr. Fung. p. 197 ; Grevillea, i. 7. Uromyces Limonii Uy. Diet. Hist. Art. TJred. p. 19. Cooke, Handb. p. 518; Mic
![. Diseases of forest trees [microform] : an address delivered by Mr. H.T. Güssow before the first annual meeting of the Commission of Conservation. Trees; Insect pests; Arbres; Insectes nuisibles, Lutte contre les. :-•*;* i i^' COMMISSION OK CO.NSEKVATION by meiiiis of the spores, hut also l>y tlie rootlike extremely delicjite, mieroscoiiic tubes which grow in the tissues of affected plants and which will produce, in the sul)sequent .season, a new crop of spores. There is another factor peculii'r to nearly all rust fungi which in- creases -^till more the serious nature of the disea.se. The Stock Photo](https://c8.alamy.com/comp/REMMD7/diseases-of-forest-trees-microform-an-address-delivered-by-mr-ht-gssow-before-the-first-annual-meeting-of-the-commission-of-conservation-trees-insect-pests-arbres-insectes-nuisibles-lutte-contre-les-i-i-commission-ok-consekvation-by-meiiiis-of-the-spores-hut-also-lgty-tlie-rootlike-extremely-delicjite-mieroscoiiic-tubes-which-grow-in-the-tissues-of-affected-plants-and-which-will-produce-in-the-sulsequent-season-a-new-crop-of-spores-there-is-another-factor-peculiir-to-nearly-all-rust-fungi-which-in-creases-till-more-the-serious-nature-of-the-disease-the-REMMD7.jpg ". Diseases of forest trees [microform] : an address delivered by Mr. H.T. Güssow before the first annual meeting of the Commission of Conservation. Trees; Insect pests; Arbres; Insectes nuisibles, Lutte contre les. :-•*;* i i^' COMMISSION OK CO.NSEKVATION by meiiiis of the spores, hut also l>y tlie rootlike extremely delicjite, mieroscoiiic tubes which grow in the tissues of affected plants and which will produce, in the sul)sequent .season, a new crop of spores. There is another factor peculii'r to nearly all rust fungi which in- creases -^till more the serious nature of the disea.se. The Stock Photo")
RMREMMD7–. Diseases of forest trees [microform] : an address delivered by Mr. H.T. Güssow before the first annual meeting of the Commission of Conservation. Trees; Insect pests; Arbres; Insectes nuisibles, Lutte contre les. :-•*;* i i^' COMMISSION OK CO.NSEKVATION by meiiiis of the spores, hut also l>y tlie rootlike extremely delicjite, mieroscoiiic tubes which grow in the tissues of affected plants and which will produce, in the sul)sequent .season, a new crop of spores. There is another factor peculii'r to nearly all rust fungi which in- creases -^till more the serious nature of the disea.se. The
RMRE37F4–. The British rust fungi (Uredinales) their biology and classification. Rust fungi. ON UMBELLIFERjE 195 67. Puccinia Chaerophylli Purt. Puccinia Ch(xerophylli Purton, Midi. Flor. iii. 303. i. 367. Fischer, Ured. Schweiz, p. 129, f. 98. P. Pimpinellae Str. ; Plowr. Ured. p. 155 p.p. Sydow, Monogr. Spermogones. Pale-yellow, roundish. JEcidiospores. -^cidia on the leaves and petioles, on the leaves scattered or circinate, on the petioles and nerves in dense elongated clusters and causing a slight hypertrophy, between cup-shaped and pustulate, yellowish; peridium poorly developed ; spores verrucul
RMRE2G5C–. The British rust fungi (Uredinales) their biology and classification. Rust fungi. 340 MELAMPSOKA pores; paraphyses capitate with a slender pedicel, thickened (up to 8 /li) above, 50—70 x 18—25 ix. Teleuto spores. Sori hypophyllous, covered by the epidermis, small, about mm. diam., but united into groups bounded by the veins, brown with a tinge of bluish-grey; spots brown on the upper surface; spores irregularly pris- matic, rounded at both ends, 25—40 X 7—13 yu.; epispore thin, clear-brown, scarcely thickened above, with a barely perceptible apical germ-pore. Cseomata on Euonymus europaeus
RMRE1WNP–. The British rust fungi (Uredinales) their biology and classification. Rust fungi. 272 PUCCINIA uEcidiospores. J^cidia hypophyllous in small clusters on yellowish spots, or on the petioles or stems forming elongated groups, cup-shaped, with a cut white margin; spores densely and finely verruculose, yellowish, 15—25/i. Uredospores. Sori amphigenous, scattered, rarely confluent, elliptical or oblong, 1—2 mm. long, pulverulent, pale yellowish- brown ; spores mostly ovate or ellipsoid, delicately echinulate, pale brownish-yellow, 20—35 x 12—20/x; germ-pores indis- tinct ; paraphyses numerous, cla
RMRE36Y0–. The British rust fungi (Uredinales) their biology and classification. Rust fungi. Fig. 230. G. clavariaeforme, .^cidia (Eoeatelia) on leaf, fruit and branch of Hawthorn (reduced); a, peridium x 16. The fruit and gall on branch are shown as tliey appear when the peridia are old and the mass looks some- what like a honey-comb. 2| mm. high, fimbriate above, at length lacerate to base, pale- brown ; spores verruculose, brownish, about 28—30 fi; pores 8—10, scattered. Teleutospores. Spores collect- ed in long, cylindrical, conical, ribbon-like or tongue-shaped masses about 1 cm. long; which are a
RMRE383K–. The British rust fungi (Uredinales) their biology and classification. Rust fungi. 108 UROMYCES (see Bot. Zeit. Ixiii. 75), that an Decidium which he finds on R. Ficaria is connected with U. Rumids (q.v.). The spores of U. Ficariae and U. Rumicis are very similar. Distribution : Europe generally, except the extreme South. 21. Uromyces caryophyllinus Wint. Lycoperdon caryophyllmum Schrank, Baier. Flor. ii. 668. Uromyces caryophyllinus Winter, Pilze, p. 149. Sacc. Syll. vii. 545. Sydow, Monogr. ii. 210, 362. Fischer, Ured. Schweiz, p. 11, f. 10. Trans. Brit. Myc. See. iii. 122. McAlpine, Rusts
RMRE381K–. The British rust fungi (Uredinales) their biology and classification. Rust fungi. 126 UEOMYCES Teleutospores, Sori generally hypophyllous, similar to the uredo-sori but more often confluent, always covered by the epidermis, compact, shining, black; spores ovate- oblong, occasionally ellipsoid or pyri- form, rounded above, rarely truncate, often slightly thickened (up to 4 //,), Fig. 77. U.Dactylidis. Te- smooth, yellow-brown, darker only leutospores and the aocom- along the summit, 18â30 X 14â panying paraphyses. r./ ⢠i i j..- ^ j â i 20 /x; epispore 1-| yu. thick; pedicels brownish, per
RMRE3841–. The British rust fungi (Uredinales) their biology and classification. Rust fungi. ON GERANIACE^ 105 by a pore; spores roundish-polygonal to oblong-ovate, densely verruculose, yellow, 24—33 x 18—26 ytt. Uredospores. Sori hypophyllous, on yellow spots, in circi- nate groups, seldom scattered, rather large, pulverulent, choco- late-brown ; spores roundish, brown, distantly echinulate, 22— 26 fi; epispore about 2 /j, thick. Teleutospores. Sori hypophyllous, on yellowish or reddish. Fig. 58. U. Kabatianus. Teleutospores and uredospore, on G. pyrenaicum. spots, rather large, covered with the thin
RMRE36XJ–. The British rust fungi (Uredinales) their biology and classification. Rust fungi. 308 GYMNOSPOEANGIUM yEcidiospores. iEcidia hypophyllous, in irregular or circular groups, horn-shaped, conical, curved, ^ mm. wide, 2 mm. long, at length open and fimbriate above, yellowish- brown, on round spots which are brownish below, and bright-orange or red on the upper side; spores finely verruculose, brown, 21—28x19—24|U,; Pig. 233. G. Juniperi. orerm-pores 8—10, scattered. Groups of ffioidia on leaflet ,„ , o of Mountain Ash x IJ; feleutospores. fepore-masses on a, an unopened peridium ^^^^^ ^^.^^ ^^^
RMRE2G32–. The British rust fungi (Uredinales) their biology and classification. Rust fungi. MELAMPSORA 355 -28 X 10—18 fi;. Fig. 265. M. Hypericorum. a, teleutospores, under the epidermis; 6, soidiospore, without paraphyses. On H. Androsaemum. chains, ellipsoid to polygonal or subclavate, 18 epispore colourless, about 2 /a thick, rather densely verruculose, with no perceptible germ-pores; no para- physes. Teleutospores. Sori hypophyllous, subepidermal, small, roundish, red- dish-brown, then dark-brown; spores prismatic, more or less rounded above, pale-brown, 28—40 x 10—17/a; epi- spore thickened (up
RMRE387M–. The British rust fungi (Uredinales) their biology and classification. Rust fungi. VROufcES/ 87 ^/ ritbW The uredospores seem to be varikble in their markings ; some are distinctly verruoose with pointed warts-withers are as distinctly echinulate. Distribution : Europe and South Africa. 2. Uromyces Scrophulariae Fckl. uScidium, Herophulariae DC. -, Cooke, Handb. p. 544; Micr. Fung. p. 199. Uromyces Scrophulariae Fckl. Symb. Myc. p. 63. Plowr. Ured. p. 139. Saoc. Syll. vii. 559. Sydow, Monogr. ii. 27. Fischer, Ured. Schweiz, p. 75, f. 56. V. concomitaiis B. et Br. ; Cooke, Micr. Fung. p. 213.
RMRE3786–. The British rust fungi (Uredinales) their biology and classification. Rust fungi. ON cyperacea; 243 ^cidiospores. ^cidia hypophyllous, crowded on red and yellow spots, roundish, also in elon- gated clusters on the young branches, petioles, and nerves, sometimes en- tirely covering the young fruits, shortly cylindrical, with broad, re- curved, white, much torn margin; spores orange, verruculose, 15—21 x 14—18yU,. Uredospores. Sori hypophyllous, punctiform, about ^ mm. long, on yellowish spots; spores more or less globose, pale-brown, echinulate, 1<S— 22 X 17—21 p., with three, rarely four,
![. The British rust fungi (Uredinales) their biology and classification. Rust fungi. 100 UROMYCES U. Pisi "Winter, Krypt. Flor. i. 163. Cooke, Grevillea, vii. 135. Plowr. Ured. p. 133. Saoc. Syll. vii. 542 p.p. Sydow, Monogr. ii. 124. Fischer, Ured. Schweiz, p. 28, f. 22. Spermogones. Hypophyllous, numerous, scattered amongst the ajcidia. ^cidiospores. JScidia distributed uniformly over the lower surface of the leaf, cup-shaped, with a white, torn, broadly revolute margin; spores densely and minutely verruculose, orange, 18—23 /u.. Uredospores. Sori generally hypophyllous, scattered, minut Stock Photo](https://c8.alamy.com/comp/RE3853/the-british-rust-fungi-uredinales-their-biology-and-classification-rust-fungi-100-uromyces-u-pisi-quotwinter-krypt-flor-i-163-cooke-grevillea-vii-135-plowr-ured-p-133-saoc-syll-vii-542-pp-sydow-monogr-ii-124-fischer-ured-schweiz-p-28-f-22-spermogones-hypophyllous-numerous-scattered-amongst-the-ajcidia-cidiospores-jscidia-distributed-uniformly-over-the-lower-surface-of-the-leaf-cup-shaped-with-a-white-torn-broadly-revolute-margin-spores-densely-and-minutely-verruculose-orange-1823-u-uredospores-sori-generally-hypophyllous-scattered-minut-RE3853.jpg ". The British rust fungi (Uredinales) their biology and classification. Rust fungi. 100 UROMYCES U. Pisi "Winter, Krypt. Flor. i. 163. Cooke, Grevillea, vii. 135. Plowr. Ured. p. 133. Saoc. Syll. vii. 542 p.p. Sydow, Monogr. ii. 124. Fischer, Ured. Schweiz, p. 28, f. 22. Spermogones. Hypophyllous, numerous, scattered amongst the ajcidia. ^cidiospores. JScidia distributed uniformly over the lower surface of the leaf, cup-shaped, with a white, torn, broadly revolute margin; spores densely and minutely verruculose, orange, 18—23 /u.. Uredospores. Sori generally hypophyllous, scattered, minut Stock Photo")
RMRE3853–. The British rust fungi (Uredinales) their biology and classification. Rust fungi. 100 UROMYCES U. Pisi "Winter, Krypt. Flor. i. 163. Cooke, Grevillea, vii. 135. Plowr. Ured. p. 133. Saoc. Syll. vii. 542 p.p. Sydow, Monogr. ii. 124. Fischer, Ured. Schweiz, p. 28, f. 22. Spermogones. Hypophyllous, numerous, scattered amongst the ajcidia. ^cidiospores. JScidia distributed uniformly over the lower surface of the leaf, cup-shaped, with a white, torn, broadly revolute margin; spores densely and minutely verruculose, orange, 18—23 /u.. Uredospores. Sori generally hypophyllous, scattered, minut
RMRE2G05–. The British rust fungi (Uredinales) their biology and classification. Rust fungi. 372 CALYPTOSPOEA CALYPTOSPORA J. Kuhn. Heteroecious. Teleutospores intracellular, occupying the swollen epidermal cells all round the stem of the host for a considerable distance,, otherwise as in Pucciniastrum. No uredo. ^cidia cylindrical, with a thin peridium; secidiospores verrucose, without germ-pores, and with no smooth spot. Calyptospora Goeppertiana Kuhn. JEcidium columnare A. et S. Consp. p. 121, pi. 5, f. 4. Peridermium columnare S. et K.; Cooke, Handb. p. 535; Micr. Fung. p. 194, pi. 2, f 27, 28. ? ^
RMRE37XM–. The British rust fungi (Uredinales) their biology and classification. Rust fungi. Fig. 94. P. Girsii. Teleuto- spores, on C. palustre, from Hereford. Fig. 95. P. Girsii. Teleuto- apore and uredospore, on G. lanceolatum. Teleutospores. Sori mostly hypophyllous only, similar, but blackish-brown or black; spores ellipsoid or somewhat obovate, rounded at both ends, not thickened above, hardly constricted, verruculose or merely punctate, chestnut-brown, 25—38 x 17—25 jj,; epispore thin; pedicels hyaline, very short: On Girsium, Dupplin Castle, Perth (M. C. Cooke). On G. pratense, Ballyquirke Lake
RMRE37XY–. The British rust fungi (Uredinales) their biology and classification. Rust fungi. ON COMPOSITE 141 spores globose to ellipsoid, delicately echinulate, yellow-brown, 22—30 X 19—24 [i, with two germ-pores. Teleutospores. Sori amphigenous and on the stems, scattered, minute, punctiform, pulverulent, blackish-brown; spores broadly ellip- soid, rounded at both ends, not thickened above, not constricted, very delicately verruculose, chestnut- brown, 30—35 X 22—27/Lt, sometimes longer ; pedicels hyaline, short. ° ' ^ •' Kg. 93. p. Cyani. On Gentaurea Gyanus. Not un- Teleutospores.' common in garden
RMRE37C7–. The British rust fungi (Uredinales) their biology and classification. Rust fungi. 212 PUCCINIA 82. Puccinia Ribis DC. Puccinia Ribis DC. Flor. fr. ii. 221. Gard. Chron. 1894, xvi. 136. Trans. Brit. Myo. Soc. i. 57. Saoc. Syll. vii. 679. Sydow, Mbnogr. i. 496. Teleutospores.. Fig. 159. P. Ribis. Teleutospores and mesospore. Sori epiphyllous, orbicular, surrounded by a discoloured yellow zone, circinate and often confluent, pulverulent, rich chestnut-brown; spores oval or oblong, rounded above and be- low, apex thickened slightly and hooded, hardly constricted, verru- culose or rather punctate
RMRE2G74–. The British rust fungi (Uredinales) their biology and classification. Rust fungi. 332 ZAGHOUANIA Zaghouaniacese, for its reception and compare it to Septobasi- dium among the AuricularieiE; it seems more likely that Zaghouania will be proved to belong to the Pucciniacege. Zaghouania Phillyrese Fat. Vadium Phillyreae DC. Flor. fr. vi. 96. Saco. Syll. vii. 807. Massee, Journ. Bot. 1908, xlvi. 153. Trans. Brit. Myc. Soc. iii. 123. u3S. crassum var. Phillyreae Cooke, Handb. p. 539. Uredo Phillyreae Cooke, Exsieo. i. 592. Plowright, Ured. p. 258. Sacc. Syll. vii. 856. Zaghouania Phillyreae Pat. B
RMRE37FC–. The British rust fungi (Uredinales) their biology and classification. Rust fungi. 194 pucciNiA 66. Puccinia Heraclei Grev. Trichobasis Heraclei Berk. ; Cooke, Micr. Fung. p. 225. Puccinia Heraclei Grev. Scot. Cr. Flor. pi. 42. Cooke, Handb. p. 502 ; Micr. Fung. p. 208. Sydow, Monogr. i. 387. Fischer, Ured. Sohweiz, p. 132. P. Pimpinellae Strauss ; Plowr. Ured. p. 155 p.p. Spermogones. Amphigenous, scattered amongst the secidia, pale-yellowish. JEcidiospores. .^cidia hypophyllous, frequently on the petioles and especially on the nerves of the leaves, on thickened yellowish spots, densely crow
RMRE2G4K–. The British rust fungi (Uredinales) their biology and classification. Rust fungi. ON POPLAR 347 Plants of the Salix were brought from Scotland and cultivated at Walton, near Liverpool; there were then uredospores only. When the leaves fell, they were left on the ground, and two teleuto-sori were developed on them, of a rufous black colour. I have not seen the specimens. 10. Melampsora populina L^v. Melampsora populina L^v. Ann. Sci. Nat. 1847, p. 375. Cooke, Handb. p. 523 ; Micr. Fung. p. 219. Plowr. Ured. p. 242. Saoo. Syll. vii. 590. (1) Melampsora Allii-populina Kleb. Caeoma Alliorum Link
RMRE37YJ–. The British rust fungi (Uredinales) their biology and classification. Rust fungi. ON COMPOSITiE 187 Teleutospores. Sori amphigenous, on brown orbicular spots, densely gregarious and confluent in roundish clusters, 3—6 mm. broad, occupying the whole spot, often circinate, long covered by the epidermis, at length rather pulverulent, deep-brown; spores ovate to oblong, with a very minute paler apical papilla, hardly constricted, rounded or slightly attenuated below, smooth, pale-brown, 30—45 x 16—24/x; pedicels hyaline, very short. On Senecio Jacobaea. August—November. Not common. Closely allie
![. The British rust fungi (Uredinales) their biology and classification. Rust fungi. 114 UEOMYCES of the preceding crop, all aflfected mangel " tops'' should be burnt: rotation of crops is of course a sure preventive, as in all such cases. Distribution : Europe, California, South Africa, Australia, New Zealand. 26. Uromyces Salicorniae De Bary. JEeidium Salicorniae DC. Flor. fr. vi. 92. Uromyces Salicorniae De Bary, in Rab. Fung. Eur. nos. 1385—6. Cooke, Grevillea, vii. 137. Plowr. Ured. p. 129. 538, Sydow, Monogr. ii. 230. Sacc. Syll. vii. ^cidiospores. jEcidia on the cotyledons chiefly, Stock Photo](https://c8.alamy.com/comp/RE3834/the-british-rust-fungi-uredinales-their-biology-and-classification-rust-fungi-114-ueomyces-of-the-preceding-crop-all-aflfected-mangel-quot-tops-should-be-burnt-rotation-of-crops-is-of-course-a-sure-preventive-as-in-all-such-cases-distribution-europe-california-south-africa-australia-new-zealand-26-uromyces-salicorniae-de-bary-jeeidium-salicorniae-dc-flor-fr-vi-92-uromyces-salicorniae-de-bary-in-rab-fung-eur-nos-13856-cooke-grevillea-vii-137-plowr-ured-p-129-538-sydow-monogr-ii-230-sacc-syll-vii-cidiospores-jecidia-on-the-cotyledons-chiefly-RE3834.jpg ". The British rust fungi (Uredinales) their biology and classification. Rust fungi. 114 UEOMYCES of the preceding crop, all aflfected mangel " tops'' should be burnt: rotation of crops is of course a sure preventive, as in all such cases. Distribution : Europe, California, South Africa, Australia, New Zealand. 26. Uromyces Salicorniae De Bary. JEeidium Salicorniae DC. Flor. fr. vi. 92. Uromyces Salicorniae De Bary, in Rab. Fung. Eur. nos. 1385—6. Cooke, Grevillea, vii. 137. Plowr. Ured. p. 129. 538, Sydow, Monogr. ii. 230. Sacc. Syll. vii. ^cidiospores. jEcidia on the cotyledons chiefly, Stock Photo")
RMRE3834–. The British rust fungi (Uredinales) their biology and classification. Rust fungi. 114 UEOMYCES of the preceding crop, all aflfected mangel " tops'' should be burnt: rotation of crops is of course a sure preventive, as in all such cases. Distribution : Europe, California, South Africa, Australia, New Zealand. 26. Uromyces Salicorniae De Bary. JEeidium Salicorniae DC. Flor. fr. vi. 92. Uromyces Salicorniae De Bary, in Rab. Fung. Eur. nos. 1385—6. Cooke, Grevillea, vii. 137. Plowr. Ured. p. 129. 538, Sydow, Monogr. ii. 230. Sacc. Syll. vii. ^cidiospores. jEcidia on the cotyledons chiefly,
RMRE38A4–. The British rust fungi (Uredinales) their biology and classification. Rust fungi. Fig. 27. P. Poai-um. An seoidio- spore germinating on leaf of Poa annua, x 180.. Fig. 26. P. Poaruin. Vertical section through edge of secidium; showing a, the crushed cells of the upper myce- lium, pushed on one side ; 6, the chain of peridium-cells; c, the spore bed, giviBg rise to d, the chains of Eecidio- spores. X 600. The black dots are the nucleoli; one ascidiospore-mother- cell has three nuclei. case in most of the higher forms of the Uredinales, arises deep in the leaf, and the densely packed knot of h
RMRE2GA9–. The British rust fungi (Uredinales) their biology and classification. Rust fungi. CEONARTIUM 317 Teleutospores. Columns hypophyllous, cylindrical, curved, up to 2 mm. long, crowded especially along the veins of the leaf, sometimes covering the whole leaf, orange to brownish- yellow ; spores oblong, smooth, reaching 70 fi long x 21 /x broad. jEcidia on stems and branches of Pinus GeHibra, P. monti- cola, P- Strobus, March—June; uredo- and teleutospores on Kibes nigrum, R. rubrurn, etc.,'July—October. Uncommon except when imported; Surrey, King's Lynn, Exeter, West- bury, Wobum, Windsor Forest
RMRE37PG–. The British rust fungi (Uredinales) their biology and classification. Rust fungi. 166 PUCCINIA on that plant. I am not certain that P. punctata lives on O. Cruciata, though I think I have seen it on that host; the two usual species on that Qaliwrn are P. Celakovskyana and P. Valantiae (q.v.). The seoidium seems to be less common than the other spore-forms : I have seen it on O. Mollugo, Q. verum and O. uliginosum. Mesospores have heen observed on O. palustre, G. saxatile and O. verum. On O. saxatile the teleutospores were slightly larger than in the normal form, but otherwise identical; P. V
RMRE3731–. The British rust fungi (Uredinales) their biology and classification. Rust fungi. ON GRAMINE^ 285 spores subglobose or ellipsoid, verruculose, yellowish, 19—82 x 16—24/x.J Uredospores. Sori epiphyllous, very rarely hypophyllous, on minute yellow spots, elliptical or oblong, minute, pale rust- coloured ; spores globose to ovate, echinulate, yellowish, 19—30 X 19—26 fji, with numerous germ-pores, and mixed with nume- rous capitate paraphyses which are 10—14^ broad and as much as 80 fA, long.. Fig. 215. P. Arrhenathevi. a, teleutospores on Arrheiiatherum, from Hampton- in-Arden ; 6, another, an
RMRE2G6B–. The British rust fungi (Uredinales) their biology and classification. Rust fungi. Fig. 252. E. Sem- pervivi. Sori on Seinpervivum mon- tanum (reduced). Speriiwgones. Scattered amongst the seciSia, roundish. Teleutospores. Sori rather large, amphi- genous, sunken in the leaf, secidium-like, sur- rounded by many layers of hyphse and by a peridium, which opens by a pore at the summit and finally becomes cup-shaped; spores bluntly polygonal or roundish, yellowish-brown, densely reticulate-ver rucose, 24—35 x 21—28/x; epispore 3—4i/jl thick. On Sempervivum tectorum; also found on *S. calcareum, S
RMRE37PR–. The British rust fungi (Uredinales) their biology and classification. Rust fungi. ON EUBIACE^ 165 ^cidiospores. ^cidia hypophyllous, scattered or collected in orbicular clusters on roundish or oblong paler spots, shortly- cylindrical, with a short white recurved margin; spores globose or broadly ellipsoid, orange-yellow, somewhat smooth, 16—23/A. Uredospores. Sori hypophyllous, minute, roundish, on the stems linear, reddish-brown, often confluent; spores globose to ovate, aculeolate, pale-brown, 22—30 x 17—23 fi, with two or three germ-pores.. Fig. 115. P. punctata. Teleutospores; a, on Gf.
RMRE2G00–. The British rust fungi (Uredinales) their biology and classification. Rust fungi. 374 HYALOPSORA possible alternate hosts. This is in itself improbable and is inconsistent with Arthur's suggestion that pf the two kinds of uredospores the first kind represents secidiospores. 1. Hyalopsora Aspidiotus Magn. Uredo Polypodii Schrot. Krypt. Flor. Schles. iii. 374. Plowr. Ured. p. 256 p.p. Sacc. Syll. vii. 857 p.p. U. Aspidiotus Peck in Ann. Rep. N. Y. State Mus. xxiv. 88. Melampsorella Aspidiotus Magn. Ber. Deutsch. Bot. Gesell. xiii. 288. Pvxiciniastrum Aspidiotus Karsten, Bidr. Finl. Nat. Folk,
RMRDE2DN–. A text-book of mycology and plant pathology . Plant diseases; Fungi in agriculture; Plant diseases; Fungi. Fig. 68.—Portion of a. teliosorus of cedar apple in February showing mycelia stroma and the binucleate condition of the cells of young teliospores. (After Reed. H S , and Crabill, C. H., Techn. Bull. 9, Va. Agric. Exper. Slat., May, 191S-) basidiospores teleutospore uredospore.. uredospore secidiospore intercalary cell spermatium s gamete ¥ gametes fusion-cell Fig. 69.—Diagram of the alternation of generations of a typical rust. (After Grove, W. B., The British Rust Fungi, 1913, 27.). P
RMRE2G4C–. The British rust fungi (Uredinales) their biology and classification. Rust fungi. 348 MELAMPSOEA Teleutospores. Sori hypophyllous, subepidermal, scattered over the leaf singly and in groups, pulvinate, —f mm., blackish-brown, not shining; spores prismatic, rounded at both ends, 35—60 x 6—10 /i; epispore clear-brown, 1—1^ fi thick, scarcely thickened above, without evident germ-pore. Cseomata on Allium Cepa, A. ursinum and other species. May; uredo- and teleutospores on Populus nigra, P. balsami- fera. (Fig. 260.) The description is chiefly after Klebahn. The teleutospores mature in February
RMRE1WP4–. The British rust fungi (Uredinales) their biology and classification. Rust fungi. ON GEAMINE^ 269 I have found that in many cases only one cluster is formed (or at most two small ones) on a leaf; this probably indicates a scarcity of active basidiospores. In other localities, however, eight or ten clusters may be found on a single leaf. This secidium must not be confounded with Caeoma AlUorum, which belongs to the Melampsoriie. (4) PucciNiA Phalaeidis Plowr. jEcidium Ari Desm. Cat. Plant, omis. p. 26. Cooke, Handb. p. 545 ; ilicr. Fung. p. 199. Piiccinia Phalaridis Plowr. Jouru. Linn. Soc. 1
RMRE3737–. The British rust fungi (Uredinales) their biology and classification. Rust fungi. ON GRAMINE^ 283. Fig. 214. P. persistens. Teleutospores. Uredospores. Sori minute, roundish or elongated, orange, on yellowish spots; spores more or less globose, minutely echinulate, yellow, 25—30 fz. Teleutospores. Sori hypophyl- lous, minute, ovate, oblong or linear, black, long covered by the epidermis; spores clavate-oblong or irregular, rounded, truncate or obliquely attenuate above, slightly thickened (4—7 /a), more or less constricted, rounded or often tapering below, smooth, brown, 50—60 x 15—20 /i; pe
RMRE2G8X–. The British rust fungi (Uredinales) their biology and classification. Rust fungi. COLEOSPOEIUM 327 (2) CoLEOSPORiUM Melampyri Karst. Uredo Melampyri Eebentisch, Flor. Neomaroli. p. 355. Coleosporium Melampyri Karst. Myo. Fenn. iv. 62. Fischer, Ured. Sohweiz, p. 440, f. 269. Peridermium Soraueri Kleb. Zeitschr. f. Pflanzenkr. iv. 194. The only apparent differences from G. Euphrasiae are in the size of the spores: uredospores 24—35 X 21-—28 ^i; teleutospores as much as 115/u, long, 21—28/x wide; epispore very thick (up to 28 yit) at the summit. .iEcidia on leaves of Pinus silvestris; uredo- an
RMRE37KC–. The British rust fungi (Uredinales) their biology and classification. Rust fungi. ON GENTIANA 179. Fig. 128. P. Gentianae. Teleutospore, mesospore, and uredospore, on G. acaulis. aculeolate, brownish-yellow, 20—30 x 18—24 fi, with two, rarely three, germ-pores. Teleutospores. Sori similar and also on the stems, but pulverulent and black-brown; spores ellipsoid to ovoid, rounded at both ends, not thickened above, but some- times with a low broad papilla, not constricted, smooth, dark- chestnut, 28—38 X 24—30 fj,; pedicels hyaline, thin, rather long, very deciduous; occa- sionally there are a
RMRE372F–. The British rust fungi (Uredinales) their biology and classification. Rust fungi. 286 PUCCINIA. but I have found on Arrhenatherum on many occasions teleutospores and uredospores whicli seem to be identical with those of this species, though the former are, in my specimens, often irregularly three- or four-celled. Distribution : Central and Northern Europe, Turkestan. 137. Puccinia paliformis Fckl. Puccinia paliformis Fckl. Symb. Myc. p. 59, pi. ii. f. 17. Plowr. Ured. p. 203. Sacc. Syll. vii. 731. Sydow, Monogr. i. 759, f. 534. Fischer, Ured. Schweiz, p. 264, f. 200. Teleutospores. Sori on t
RMRDEXJA–. Minnesota plant diseases. Plant diseases. Fig. 74.—More spores of rust fungi. 1. A pycnidium (from wheat rust on barberry), a capsular spore-bearing fruiting body showing dust of spores at r. 2. Spores and spore-bearing threads from 1 greatly enlarged. 3. Same spores germinating. These spores are probably the relics of male reproductive cells which have fallen into disuse. They appear to be functionless since they do not usually germinate and have never been known to cause infection. 4. A cluster-cup of an Anemone rust; s spores, formed in chains; p, threads forming the cup of the cluster-cu
RMRE37RW–. The British rust fungi (Uredinales) their biology and classification. Rust fungi. 158 PUCCINIA. Pig. 109. P. major. Te leutospore, on G. palu Uredospores. Sori amphigenous, solitary, minute, cinnamon; spores subglobose to ovoid, distinctly echinulate, brownish, 24—30 x 21— 26/x. Teleutospores. Sori chiefly hypo- phyllous, similar, but blackish-brown, standing singly, scattered over nearly the whole leaf-surface; spores ellipsoid to ovoid, rounded at both ends, not thickened above, hardly constricted, very delicately verruculose, chestnut- (Zosa; a, seeidia on leaf of r, oo ao v, oo oa . '' s
RMRE2G4N–. The British rust fungi (Uredinales) their biology and classification. Rust fungi. 344 MELAMPSOEA Spermogones. stomata. ^cidiospores. Hardly projecting, flat, mostly under the. Fig. 259. M. Orrlndi- repentis. Ca?oma on leaf of Listera ovata, from one ol Plowright's cul- tures (reduced). Cseomata irregular in outline, clustered or circinate on large pale-yellowish spots, often confluent, 1—2 mm. diam.; bright orange- yellow; spores roundish-polygonal, 11—20 x 11—15/a; epispore very thin, delicately warted. Uredospores. Sori hypophyllous, minute, deep-orange, causing yellow spots on the upper s
RMRE3862–. The British rust fungi (Uredinales) their biology and classification. Rust fungi. 96 UROMYCES uredospores. The warts on the teleutospores are not numerous and are rather easy to see. Distribution -. North-western and Middle Europe.. 11. Uromyces Ervi Westendorp. JHcidium Erm Wallr. FI. Crypt. Germ. ii. 247. Vromyces jErviWestd. Bull. Acad. Koy. Sci. Belg. xxi. pi. 2, p. 246, f. 3. Plowr. Ured. p. 140. Sydow, Monogr. ii. 96. Fischer, Ured. Sohweiz, p. 69, f. 53. ^cidiospores. ^cidia amphigenous, or on the petioles, solitary or 2—8 together in little scattered groups, cup-shaped, whitish; marg
RMRE2G3N–. The British rust fungi (Uredinales) their biology and classification. Rust fungi. 362 MELAMPSOEA Spermogones. Epiphyllous, or a few hypophyllous, in large round clusters, honey-coloured. jEcidiospores. Cseomata hypophyllous and on the petioles and stems, in clusters on pale-yellow spots, often circinate round the spermogones, about 1 mm. wide, often confluent in patches 1—1|^ cm. wide, bright-orange; spores roundish-poly- gonal or oval, 13—18x12—16/a; epispore 1—1^/x thick, finely and densely verruculose.. Fig. 263. M. Eostrvpii. u, teleutospores on P. tremula; b, teleutospore on P. alba; v,
RMRE371C–. The British rust fungi (Uredinales) their biology and classification. Rust fungi. PHRAGMIDIUM 297 7. Phragmidium Rubi Wint. Puccinia mucronata var. Rubi Pers. Disp. Meth. p. 38. Phragmidiv.m Rubi Wint. Pilze, p. 230. Plowr. Ured. p. 224. Fischer, Ured. Schweiz, p. 418, f. 290. Saco. Syll. vii. 745 p.p. Sydow, Monogr. iii. 141. Spermogones. Epiphyllous, in minute clusters. JEcidiospores. CEBomata hypophyllous, roundish, or on the nerves elongated, often in little groups,surrounded byclavate para- physes; spores resembling those of P violaceum. Sori hypophyl- spores smaller violaceum. Sori sma
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