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Uredinales Stock Photos and Images
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
RMRH1J0K–. The British rust fungi (Uredinales), their biology and classification. Uredineae. ON GENTIANA 179 with two. stems, but. aculeolate, brownish-yellow, 20—30 x 18—24 /x, rarely three, germ-pores. Teleutospores. Sori similar and also on the 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 fi; pedicels hyaline, thin, rather long, very deciduous; occa- sionally there are a few mesospores intermixed. On Gentiana acaulis. Uredo- and teleutospores, Kew Ga
![. 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.
RMRH1GHJ–. The British rust fungi (Uredinales) their biology and classification. Rust fungi -- Great Britain. 358 MKI.AMI'SOKIDII M MELAMPSORIDIUM Klebahn. I lett'i-ii'cious. Teleutospnres one-celled, with brownish membrane, united into Hat 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. yEcidia with a well-developed inflated pe
![. The British rust fungi (Uredinales), their biology and classification. Uredineae. Fig. 51. U. Fabae. Telento- spores and uiedospore on Vicia sepiani.. "biological" races—(1) on Faba vulgaris and Pisum sativum, (2) on Lathyms vernus and probably also on Pisum sativum, (3) on Vicia Cracca, Pisum sativum, and possibly also Vicia hirsata. The fecidial generation is frequent on some hosts, such as Vicia sepium and species of Latlu/rus. On Faha vulgaris and Pisum sativum it is, on the contrary, evy rare, being recorded by Sydow, on the Pea, only from Norway, East Indies and Japan (once Stock Photo](https://c8.alamy.com/comp/RH2XM5/the-british-rust-fungi-uredinales-their-biology-and-classification-uredineae-fig-51-u-fabae-telento-spores-and-uiedospore-on-vicia-sepiani-quotbiologicalquot-races1-on-faba-vulgaris-and-pisum-sativum-2-on-lathyms-vernus-and-probably-also-on-pisum-sativum-3-on-vicia-cracca-pisum-sativum-and-possibly-also-vicia-hirsata-the-fecidial-generation-is-frequent-on-some-hosts-such-as-vicia-sepium-and-species-of-latlurus-on-faha-vulgaris-and-pisum-sativum-it-is-on-the-contrary-evy-rare-being-recorded-by-sydow-on-the-pea-only-from-norway-east-indies-and-japan-once-RH2XM5.jpg ". The British rust fungi (Uredinales), their biology and classification. Uredineae. Fig. 51. U. Fabae. Telento- spores and uiedospore on Vicia sepiani.. "biological" races—(1) on Faba vulgaris and Pisum sativum, (2) on Lathyms vernus and probably also on Pisum sativum, (3) on Vicia Cracca, Pisum sativum, and possibly also Vicia hirsata. The fecidial generation is frequent on some hosts, such as Vicia sepium and species of Latlu/rus. On Faha vulgaris and Pisum sativum it is, on the contrary, evy rare, being recorded by Sydow, on the Pea, only from Norway, East Indies and Japan (once Stock Photo")
RMRH2XM5–. The British rust fungi (Uredinales), their biology and classification. Uredineae. Fig. 51. U. Fabae. Telento- spores and uiedospore on Vicia sepiani.. "biological" races—(1) on Faba vulgaris and Pisum sativum, (2) on Lathyms vernus and probably also on Pisum sativum, (3) on Vicia Cracca, Pisum sativum, and possibly also Vicia hirsata. The fecidial generation is frequent on some hosts, such as Vicia sepium and species of Latlu/rus. On Faha vulgaris and Pisum sativum it is, on the contrary, evy 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 -- Great Britain. Pig. 83. P. Chry- santhemi. Ure- dospore (Brit- ish). Uredospores. Sori generally hypophyllous, on irregular pallid-yellow or brownish spots, scattered or in clusters, about 1—1! nun. diam. often circi- oate, pulverulent, snuff-brown; spores globose to ellipsoid, delicately echinulate, brown, 24— •">2 x 17—27p, mostly with three germ-pores. [Teleutospores. Mixed with the undospores, oblong or ellipsoid, rounded and slightly thickened above, usually rounded or some- what tapering at base Stock Photo](https://c8.alamy.com/comp/RH2X8F/the-british-rust-fungi-uredinales-their-biology-and-classification-rust-fungi-great-britain-pig-83-p-chry-santhemi-ure-dospore-brit-ish-uredospores-sori-generally-hypophyllous-on-irregular-pallid-yellow-or-brownish-spots-scattered-or-in-clusters-about-11!-nun-diam-often-circi-oate-pulverulent-snuff-brown-spores-globose-to-ellipsoid-delicately-echinulate-brown-24-quotgt2-x-1727p-mostly-with-three-germ-pores-teleutospores-mixed-with-the-undospores-oblong-or-ellipsoid-rounded-and-slightly-thickened-above-usually-rounded-or-some-what-tapering-at-base-RH2X8F.jpg ". The British rust fungi (Uredinales) their biology and classification. Rust fungi -- Great Britain. Pig. 83. P. Chry- santhemi. Ure- dospore (Brit- ish). Uredospores. Sori generally hypophyllous, on irregular pallid-yellow or brownish spots, scattered or in clusters, about 1—1! nun. diam. often circi- oate, pulverulent, snuff-brown; spores globose to ellipsoid, delicately echinulate, brown, 24— •">2 x 17—27p, mostly with three germ-pores. [Teleutospores. Mixed with the undospores, oblong or ellipsoid, rounded and slightly thickened above, usually rounded or some- what tapering at base Stock Photo")
RMRH2X8F–. The British rust fungi (Uredinales) their biology and classification. Rust fungi -- Great Britain. Pig. 83. P. Chry- santhemi. Ure- dospore (Brit- ish). Uredospores. Sori generally hypophyllous, on irregular pallid-yellow or brownish spots, scattered or in clusters, about 1—1! nun. diam. often circi- oate, pulverulent, snuff-brown; spores globose to ellipsoid, delicately echinulate, brown, 24— •">2 x 17—27p, mostly with three germ-pores. [Teleutospores. Mixed with the undospores, oblong or ellipsoid, rounded and slightly thickened above, usually rounded or some- what tapering at base
RMREF63A–. Comparative morphology of Fungi. Fungi. UREDINALES 559 ribicola (Colley, 1918), C. Comptoniae, C. pyriforme (Adams, 1919), Uromyces Caladii (Christman, 1905; Fromme, 1914), Puccinia Caricis and P. Pruni-spinosae (Kursanov, 1922), the hyphae of the knot are arranged. Fig. 376.— Uromyces Poae. 1. Young aecidium. Fertile cells above and sterile degeneration cells below. 2. Immature aecidium with peridium, Per, and immature aeciospores, Sp. ( X 415; after Blackman and Fraser, 1906.) in a more or less palisade-like structure and are usually perpendicular to the plane of the epidermis, in a few sp
RMRH2XM2–. The British rust fungi (Uredinales) their biology and classification. Rust fungi -- Great Britain. 104 i ROMYCES. Te/t'itttispures. Sori similar, but less pulverulent, and blackish-brown : spores subglobose to ovate, not thickened above, but with a hyaline papilla as much as (i /x high, smooth, brown, 22â35x18â25/a; pedicels short, hyaline, deciduous. On Geranium dissectum, G. 'mode, G. Teleutospores on G. pratense, G. pyrenaicum, G. silvaticum. silvaticum. XT . â-, . ,. â ... , T JNot common, /hcidia, Marcn to June: beleutospores, JuneâOctober. (Fig. 57.) Lire proved that the secidium of th
RMRH2WWB–. The British rust fungi (Uredinales), their biology and classification. Uredineae. ON CAMPANULACE^ 159 cinnamon; spores globose to ellipsoid, echinulate, yellow-brown, 24—29 X 16—25 /i, 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 fj,; epispore thin ; pedi- cels hyaline, usually very short. p.^, ^^^ p ^.^,,„.,. On leaves and stalks of Hieracium, ° Teleutospores. H. boreale, H. ynurorum, H
RMRH1H84–. The British rust fungi (Uredinales), their biology and classification. Uredineae. 224 pucciNiA Distribution : Central and Northern Europe, Siberia, North America. 94. Puccinia Oxyriae Fckl. Pacciiiia Oxyriae Fckl. Symb. Nacht. iii. 14. Cooke, Grevillea, xi. 15. Plowr. Ured. p. 194. Sacc. Syll. vii. 642. Sydow, Mouogr. i. 567. Fischer, Ured. Sehweiz, p. 135, f. 102. Uredospores. 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,
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
RMRH2X54–. The British rust fungi (Uredinales), their biology and classification. Uredineae. 136 PUCCINIA Formerly united with Puccinia A hsinthii, 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. Puccinia expansa Link, Sp. PI. vi. 2, p. 75. Sydow, Monogr. i. 146. Fischer, Ured. Schweiz, p. 182, f. 141â2. P. Senecionis Cooke, Micr. Fung. p. 207. Plowr. Ured. p. 209, {non L
RMRH2R25–. The British rust fungi (Uredinales) their biology and classification. Rust fungi -- Great Britain. 386 UREDO Plowrighi mentions this with doubt ; Berkeley and Broome (I.e.) record it as found on Plantago al Wood Newton, and mi /'. lanceolata at Dolgelly Ralfs). In the Trans. Worcester. Nat. Club, L910, p. 291, it is recorded at Pirton Pool. These I have no1 seen. Plowrighl suggests that the Dolgelly specimen in.i be a Synchytriu'm, and some of those I have Fig. 289. U. Plantaginis. seen in herbaria under the name U. Plantaginis Uredosporea, on P. are n,,t (Jredines. But in the British Museu
RMRH2WNK–. The British rust fungi (Uredinales) their biology and classification. Rust fungi -- Great Britain. 174 PUCCINI A On leaves, petioles and stems of Glechoma hederacea {Nepeta Glechoma). June—October. Not uncommon. (Fig. L23.) 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 Prunclfn cidgari* from Sutton Park, Warwicks. ; Plowright mentions a similar one from Ben Lawers(2.c. p. 215). Distribution : E
![. The British rust fungi (Uredinales), their biology and classification. Uredineae. 296 PHRAGMIDIUM Uredospores. Sori yellow, roundish, often confluent, pul- verulent; spores ellipsoid to ovate, distantly verruculose, yellow, 28—32 X 21—24 yti." Teleutospores. Sori hypophyllous, large, roundish, thick, pulvinate, black, on conspicuous purple-bordered spots; spores. Fig. 224. Ph. violaceum. a, secidiospore; h, uredospore; c, outlines of various mature teleutospores from the same snrus; d, young teleutospore before the middle coat is fully developed, showing the fusion-nucleus in each cell, Stock Photo](https://c8.alamy.com/comp/RH2T7A/the-british-rust-fungi-uredinales-their-biology-and-classification-uredineae-296-phragmidium-uredospores-sori-yellow-roundish-often-confluent-pul-verulent-spores-ellipsoid-to-ovate-distantly-verruculose-yellow-2832-x-2124-ytiquot-teleutospores-sori-hypophyllous-large-roundish-thick-pulvinate-black-on-conspicuous-purple-bordered-spots-spores-fig-224-ph-violaceum-a-secidiospore-h-uredospore-c-outlines-of-various-mature-teleutospores-from-the-same-snrus-d-young-teleutospore-before-the-middle-coat-is-fully-developed-showing-the-fusion-nucleus-in-each-cell-RH2T7A.jpg ". The British rust fungi (Uredinales), their biology and classification. Uredineae. 296 PHRAGMIDIUM Uredospores. Sori yellow, roundish, often confluent, pul- verulent; spores ellipsoid to ovate, distantly verruculose, yellow, 28—32 X 21—24 yti." Teleutospores. Sori hypophyllous, large, roundish, thick, pulvinate, black, on conspicuous purple-bordered spots; spores. Fig. 224. Ph. violaceum. a, secidiospore; h, uredospore; c, outlines of various mature teleutospores from the same snrus; d, young teleutospore before the middle coat is fully developed, showing the fusion-nucleus in each cell, Stock Photo")
RMRH2T7A–. The British rust fungi (Uredinales), their biology and classification. Uredineae. 296 PHRAGMIDIUM Uredospores. Sori yellow, roundish, often confluent, pul- verulent; spores ellipsoid to ovate, distantly verruculose, yellow, 28—32 X 21—24 yti." Teleutospores. Sori hypophyllous, large, roundish, thick, pulvinate, black, on conspicuous purple-bordered spots; spores. Fig. 224. Ph. violaceum. a, secidiospore; h, uredospore; c, outlines of various mature teleutospores from the same snrus; d, young teleutospore before the middle coat is fully developed, showing the fusion-nucleus in each cell,
RMRH2X53–. The British rust fungi (Uredinales) their biology and classification. Rust fungi -- Great Britain. 140 IM< i INI Spermogones. Chiefly epiphyllous, in little clusters, orange. Uredospores. Sori generally hypophyllous, on yellowish or brownish spots (spots sometimes aone), primary rather large, secondary very minute, much scattered, pulverulent, brown : spores globose to ellipsoid, acu- leolate, brown, 22—30 x 16— 28 ix, with three (or two) germ- pores. Teleutospores. Sori similar, but blackish-brown; spores ellipsoid or somewhat obovate, rounded at both ends, not thick- ened above, not o
RMRH2T4M–. The British rust fungi (Uredinales) their biology and classification. Rust fungi -- Great Britain. Fig. 230. G. clavariaeforme. /Ecidia (Rnestelia) on leaf, fruit and branch of Hawthorn (reduced) ; a, peridium x 16. The fruit and gall on branch are shown as they appear when the peridia are old and the mass looks some- what like a honey-comb. •2h mm. high, fimbriate above, at length lacerate to base, pale- brown ; spores verruculose, brownish, about 28—30 jx ; pores 8—10, scattered. Teleutospores. Spores collect- ed in long, cylindrical, conical, ribbon-like or tongue-shaped masses about 1 cm
RMRH2W3M–. The British rust fungi (Uredinales) their biology and classification. Rust fungi -- Great Britain. OX JUNCACE.-E 237 spores ellipsoid to ovate, echinulate, pale-brown, 18—26 x 15— 22 jx ; 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. obscura. Teleutospores; two mesospores, one germinated in the sorus; and two uredospores ; all on L. campestris. oblong, rounded, rarely truncate or conical above and thickened (5—9 /m), gently constricted, usually attenuated belo
RMRH2X2B–. The British rust fungi (Uredinales) their biology and classification. Rust fungi -- Great Britain. ON COMPOSITE 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.). Fig. 100. P. Hypoehoeridis. Uredospore (British) on H. radicata. Fig. 101. P. Hypoehoeridis. Teleuto- spores aud uredospore, on H. glabra (Berlin, ex herb. Sydow). This species, which has been often stated to be a Brachypuccinia, differs from most others of the type of
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
RMRH1HC2–. The British rust fungi (Uredinales) their biology and classification. Rust fungi -- Great Britain. 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 /a), gently constricted, rounded or attenuated below, smooth, yellowish-brown, 30—50 x 10—20/a; pedicels hyaline, persistent, 60—85 /x long. On various Caryophyllacere, such as Dianihus barbatus, Lychnis diurna, L. vespertina, Arenaria trinervis, Gypsophila elegans, Sagina nodosa (?), Spergula arvensi
RMRH2RWE–. The British rust fungi (Uredinales) their biology and classification. Rust fungi -- Great Britain. 324 CLEOSPORIUW Uredospores. Sori scattered, orange, at first covered by the epidermis, soon pulverulent : spores ovate or ellipsoid, densely and evenly verruculose, 21â34 x 14â21 p. Teleutospores. Sori forming little red crusts; spores pris- matic, 1«â iiâ ;11 i up to 100 (x, breadth ISâ24^: epispore up to 14^ thick at the summit. Jv-idia on loaves of l'iims sih-,-st,-is uredo-and teleutospores on Peta&ites officinalis, AugustâNovember, not uncommon. The life-cycle has been demonstrated
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
RMRH28W3–. The British rust fungi (Uredinales), their biology and classification. Uredineae. GERMINATION OF ^CIDIOSPORES 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 peridium, on Nettle ; b, a cell in optical section; e, the same in surface-view ; d, two ascidiospores. 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 mo
RMRH2XDT–. The British rust fungi (Uredinales), their biology and classification. Uredineae. 112 UROMYCES ^cidiospores. ^cidia amphigenous, clustered in circles 5— 10 mm. diam., cylindrical, whitish, margin deeply torn; spores delicately verruculose, yellow, 18—22/^ diam. Uredospores. Sori amphigenous, scattered or gregarious, round or more frequently elongate, small, surrounded by the conspicuous torn epi- dermis, cinnamon; spores globose to oval or oblong, delicately and sparingly echinu- late, yellowish-brown, 18—25 x 16—21 /x; epispore about 1^ /x thick. Teleutospores. Sori amphigenous but mostly c
RMRH2XEJ–. The British rust fungi (Uredinales), their biology and classification. Uredineae. 110 UKOMYCES clusters, cup-shaped, whitish-yellow, with a torn revolute margin; spores densely and minutely verruculose, yellowish; 15—21 fj. diam.. Fig. 62. IL Behetiis. a, secidia on early leaf, b, fecidia on later leaf, of <S'. infiata ; two telentospores. Teleutospores. Sori bypophyllous 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, br
 ll : pedicels brownish, persis- tent, thick, about as long as the spore or longer; no mesospores were seen, but some irregular spores. On Aster Tripolivm. New Pitsligo, 1870 (Herb. Berk.); Wblferton Beach, King's Lynn, July—November, 1873 (Plow- right). (Fig. 80.) The greyish tinge mentioned by Plowright seems to be due to germ- tubes issuing from the spores of this Lejrtopuccinia. This species is decidedly different from the American forms wi Stock Photo")
RMRH2X9H–. The British rust fungi (Uredinales) their biology and classification. Rust fungi -- Great Britain. 130 PUCCINIA pale clear-brown, 45—60 x 20—2.") ll : pedicels brownish, persis- tent, thick, about as long as the spore or longer; no mesospores were seen, but some irregular spores. On Aster Tripolivm. New Pitsligo, 1870 (Herb. Berk.); Wblferton Beach, King's Lynn, July—November, 1873 (Plow- right). (Fig. 80.) The greyish tinge mentioned by Plowright seems to be due to germ- tubes issuing from the spores of this Lejrtopuccinia. This species is decidedly different from the American forms wi
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
RMRH2T16–. The British rust fungi (Uredinales), their biology and classification. Uredineae. CHRYSOMYXA 311 Picea excelsa in the North of Europe and has its nredo- and teleutospores on Ledum palustre, on which it produces witches'- brooms. See Klebahn, Wirts. Rost. p. 391. It is named by Tranzschel Ghrysomyxa Woronini. Quite recently also Chrysoinyxa Rhododendri has been detected in Scotland by Mr D. A. Boyd. See Appendix. 1. Chrysomyxa Empetri Schrot. Uredo Empetri Pers. ; Cooke, Handb. p. 527 ; Micr. Fuug. p. 216. Chrysomyxa Empetri Schrot. Krypt. Flor. Schles. iii. 372. Plowr. Ured. p. 253. Sacc. Sy
RMRH2TW4–. The British rust fungi (Uredinales) their biology and classification. Rust fungi -- Great Britain. Fig. lfl-5. P. Lolii. .Ecidia on leaves of /.'. 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. .Ecidia on Rim minis catharticus, May and June: uredo- and teleutospores on Alopecurus pratensis, Arrhenatherum elatius, Avena fatua, A. pratensis, A. sativa, Festuca elatior, Glyceria aquatica, Holcus lonatus, H. mollis, Lolium p
RMRH2T32–. The British rust fungi (Uredinales) their biology and classification. Rust fungi -- Great Britain. GYMNOSPOKANGIUM :}()!• JEcidiospores. yEcidia 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 /u. (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-wall
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.
RMRH1HKJ–. The British rust fungi (Uredinales), their biology and classification. Uredineae. 206 PUCCINIA oblong to clavate, rounded above and not thickened, evidently constricted, usually attenuated below, smooth, brown, 55—90 x 20—35 yu, (or even 100yu, 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 the
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
![. The British rust fungi (Uredinales) their biology and classification. Rust fungi -- Great Britain. 132 PUCCINI . Pig. 83. P. Chry- santhemi. Ure- dospore (Brit- ish). Uredospores. Sori generally hypophyllous, on irregular pallid-yellow or brownish spots, scattered or in clusters, about 1—1! nun. diam. often circi- oate, pulverulent, snuff-brown; spores globose to ellipsoid, delicately echinulate, brown, 24— •">2 x 17—27p, mostly with three germ-pores. [Teleutospores. Mixed with the undospores, oblong or ellipsoid, rounded and slightly thickened above, usually rounded or some- what t Stock Photo](https://c8.alamy.com/comp/RH2X8R/the-british-rust-fungi-uredinales-their-biology-and-classification-rust-fungi-great-britain-132-puccini-pig-83-p-chry-santhemi-ure-dospore-brit-ish-uredospores-sori-generally-hypophyllous-on-irregular-pallid-yellow-or-brownish-spots-scattered-or-in-clusters-about-11!-nun-diam-often-circi-oate-pulverulent-snuff-brown-spores-globose-to-ellipsoid-delicately-echinulate-brown-24-quotgt2-x-1727p-mostly-with-three-germ-pores-teleutospores-mixed-with-the-undospores-oblong-or-ellipsoid-rounded-and-slightly-thickened-above-usually-rounded-or-some-what-t-RH2X8R.jpg ". The British rust fungi (Uredinales) their biology and classification. Rust fungi -- Great Britain. 132 PUCCINI . Pig. 83. P. Chry- santhemi. Ure- dospore (Brit- ish). Uredospores. Sori generally hypophyllous, on irregular pallid-yellow or brownish spots, scattered or in clusters, about 1—1! nun. diam. often circi- oate, pulverulent, snuff-brown; spores globose to ellipsoid, delicately echinulate, brown, 24— •">2 x 17—27p, mostly with three germ-pores. [Teleutospores. Mixed with the undospores, oblong or ellipsoid, rounded and slightly thickened above, usually rounded or some- what t Stock Photo")
RMRH2X8R–. The British rust fungi (Uredinales) their biology and classification. Rust fungi -- Great Britain. 132 PUCCINI . Pig. 83. P. Chry- santhemi. Ure- dospore (Brit- ish). Uredospores. Sori generally hypophyllous, on irregular pallid-yellow or brownish spots, scattered or in clusters, about 1—1! nun. diam. often circi- oate, pulverulent, snuff-brown; spores globose to ellipsoid, delicately echinulate, brown, 24— •">2 x 17—27p, mostly with three germ-pores. [Teleutospores. Mixed with the undospores, oblong or ellipsoid, rounded and slightly thickened above, usually rounded or some- what t
RMRH2WWT–. The British rust fungi (Uredinales) their biology and classification. Rust fungi -- Great Britain. L62 PUCCINIA rarely observed. 1 bave pointed but elsewhere that it is on spring flowering plants of this kind thai Micropuccinise would naturally arise (as well as n alpine plants), if they are the result of an adaptation to a shortened vegetative period. Uromycea Fica/riae may be taken as another instance of a similar character. 35. Puccinia albescens Plowr. JEcidium albescens Grev. Fl. Edin. p. 444. Cooke, Handb. p. 536 : .Micr. Fung. p. 194. Puccinia albescens Plowr. Ured. p. 153. Fischer, U
RMRH2T2H–. The British rust fungi (Uredinales) their biology and classification. Rust fungi -- Great Britain. CHRYSOMYXA 311 Picea e.rcelsa in the North of Europe and has its uredo- and teleutospores on Ledum pcdustre, on which it produces witches'- brooms. See Klebahn, Wirts. Rost. p. 391. It is named by Tranzschel Chrysomyxa Woronini. Quite recently also Chrysomyxa Rhododendri has been detected in Scotland by Mr D. A. Boyd. See Appendix. 1. Chrysomyxa Empetri Schrot. Ured Empetri Pens. ; Cooke, Handb. p. 527 ; Micr. Fung. p. 216. Chrysomyxa Empetri Schrot. Krypt. Flor. Schles. iii. 372. Plowr. Ured.
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
![. Fungi, ascomycetes, ustilaginales, uredinales. Fungi. CH. Il] ASCOMYCETES 35 The Ascus. The ascus or mother-cell of the spores is a spherical, oval, club-shaped, or almost cylindrical organ with a narrow, more or less elongated. Pleospora sp.; germinating spores, x looo. base. When moderately young it contains a single nucleus which undergoes three karyokinetic divisions giving rise to eight daughter nuclei (fig. 3). Asci of the short, stout type are full of dense cyto- plasm ; in the relatively cylindrical forms the ends are usually vacuolate, but a broad, granular belt fills the middle reg Stock Photo](https://c8.alamy.com/comp/RDX1XC/fungi-ascomycetes-ustilaginales-uredinales-fungi-ch-il-ascomycetes-35-the-ascus-the-ascus-or-mother-cell-of-the-spores-is-a-spherical-oval-club-shaped-or-almost-cylindrical-organ-with-a-narrow-more-or-less-elongated-pleospora-sp-germinating-spores-x-looo-base-when-moderately-young-it-contains-a-single-nucleus-which-undergoes-three-karyokinetic-divisions-giving-rise-to-eight-daughter-nuclei-fig-3-asci-of-the-short-stout-type-are-full-of-dense-cyto-plasm-in-the-relatively-cylindrical-forms-the-ends-are-usually-vacuolate-but-a-broad-granular-belt-fills-the-middle-reg-RDX1XC.jpg ". Fungi, ascomycetes, ustilaginales, uredinales. Fungi. CH. Il] ASCOMYCETES 35 The Ascus. The ascus or mother-cell of the spores is a spherical, oval, club-shaped, or almost cylindrical organ with a narrow, more or less elongated. Pleospora sp.; germinating spores, x looo. base. When moderately young it contains a single nucleus which undergoes three karyokinetic divisions giving rise to eight daughter nuclei (fig. 3). Asci of the short, stout type are full of dense cyto- plasm ; in the relatively cylindrical forms the ends are usually vacuolate, but a broad, granular belt fills the middle reg Stock Photo")
RMRDX1XC–. Fungi, ascomycetes, ustilaginales, uredinales. Fungi. CH. Il] ASCOMYCETES 35 The Ascus. The ascus or mother-cell of the spores is a spherical, oval, club-shaped, or almost cylindrical organ with a narrow, more or less elongated. Pleospora sp.; germinating spores, x looo. base. When moderately young it contains a single nucleus which undergoes three karyokinetic divisions giving rise to eight daughter nuclei (fig. 3). Asci of the short, stout type are full of dense cyto- plasm ; in the relatively cylindrical forms the ends are usually vacuolate, but a broad, granular belt fills the middle reg
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
RMRH2XYF–. The British rust fungi (Uredinales) their biology and classification. Rust fungi -- Great Britain. 86 UROMYCES The species are arranged according to the families to which the hosts belong: sec I'nrr'uiia. This genus is often considered the must highly (a1 least the latesl I evolved of the Uredinales ; ltut rather it forms a heterogeneous group, the species of which have arisen at different times from various species of Puccinia. 1. Uromyces Valerianae Fckl. Uredo Valerianae Schum. PL Sail, ii. 233. /Ecidium Valerianearum Duby, Bot. Gall. ii. 908. Cooke, Handb. p. 540; Micr. Fung. p. 196. h-i
RMRH2THK–. The British rust fungi (Uredinales) their biology and classification. Rust fungi -- Great Britain. â 27-2 PUCCINIA JZcidiospores. /Ecidia hypophyllous in small clusters on yellowish spots, or on tin- petioles or stems t'uniiing elongated groups, cup-shaped, with a cut white margin; spores densely and finely verruculose, yellowish, 15â25 fi. Uredospores. Sori amphigenous, scattered, rarely confluent, elliptical or oblong, 1â2 mm. long, pulverulent, pale yellowish- brown; spores mostly ovate or ellipsoid, delicately echinulate, pale brownish-yellow, 20â35 x 12â20/&; germ-pores indis- tinct
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
![. The British rust fungi (Uredinales) their biology and classification. Rust fungi -- Great Britain. 206 PUCCINI A oblong i" clavate, rounded above and not thickened, evidently constricted, usually attenuated below, smooth, brown, 55—90x20—35 yu. (or even 100yu, long); pedin-Is hyaline, per- sistent, very long, (reaching 160 /*). On Buxu8 8emperviren8. 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. Stock Photo](https://c8.alamy.com/comp/RH1HMW/the-british-rust-fungi-uredinales-their-biology-and-classification-rust-fungi-great-britain-206-puccini-a-oblong-iquot-clavate-rounded-above-and-not-thickened-evidently-constricted-usually-attenuated-below-smooth-brown-5590x2035-yu-or-even-100yu-long-pedin-is-hyaline-per-sistent-very-long-reaching-160-on-buxu8-8emperviren8-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-ie-RH1HMW.jpg ". The British rust fungi (Uredinales) their biology and classification. Rust fungi -- Great Britain. 206 PUCCINI A oblong i" clavate, rounded above and not thickened, evidently constricted, usually attenuated below, smooth, brown, 55—90x20—35 yu. (or even 100yu, long); pedin-Is hyaline, per- sistent, very long, (reaching 160 /*). On Buxu8 8emperviren8. 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. Stock Photo")
RMRH1HMW–. The British rust fungi (Uredinales) their biology and classification. Rust fungi -- Great Britain. 206 PUCCINI A oblong i" clavate, rounded above and not thickened, evidently constricted, usually attenuated below, smooth, brown, 55—90x20—35 yu. (or even 100yu, long); pedin-Is hyaline, per- sistent, very long, (reaching 160 /*). On Buxu8 8emperviren8. 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.
RMRH2XE5–. The British rust fungi (Uredinales), their biology and classification. Uredineae. ON CARYOPHYLLACE.E 111 first generation, and their mycelium can pi'oduce either lecidiospores or teleutospores or both. No spermogones seem to be known. The aecidiuni requires to be carefully distinguished from that of Puccinia Behenis (P. Silenes) (q.v.), which is 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. 5
RMRH2X7B–. The British rust fungi (Uredinales), their biology and classification. Uredineae. ON COMPOSITE 181 the epidermis and resemble rather a Dothidea or Asteroma than a Puccinia. The spores bear a slight resemblance to those of P. Poancm, 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. Puccinia Millefolii Fckl. Symb. Myc. p. 55. Cooke, Micr. Fung. p. 207. Plowr. Ured. p. 215. Sydow, Monogr. i, 2. Fischer, Ured. Schweiz, p. 296, f. 216. Teleutospores. Sori
RMRH2WXA–. The British rust fungi (Uredinales) their biology and classification. Rust fungi -- Great Britain. ON ADOXA 161 On Adoxa Moschatellina. March—May. Not uncommon. All parts of the plant are affected, rhizomes, petioles, leaves, peduncles and flowers. (Fig. 112.) Puccinia Adoxae and the secidium of P. albescens (q.v.) are about equally common, but are rarely found together ; they occur not only on different „. , . A ii i • -a i + i i r Fig-112- P. Adoxae. plants, but usually also in widely separated locali- Teleutospores ties. In fact, it is agreed by all observers that there are three cases, (
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
RMRH2R1R–. The British rust fungi (Uredinales), their biology and classification. Uredineae. 386 UREDO Plowright mentions this with doubt; Berkeley and Broome (I.e.) record it as found on Plantago at Wood Newton, and on P. lanceolata at Dolgelly (Ralfs). In the Trans. Worcester. Nat. Club, 1910, p. 291, it is recorded at Pirton Pool. These I have not seen. Plowright suggests that the Dolgelly specimen may be a Syncliytrium, and some of those I have Fig. 289. U. Plantaginis. seen in herbaria under the name U. Plantaginis Uredospores, on P. j^^e not Uredines. But in the British Museum major, from the Isl
RMRH1GAP–. The British rust fungi (Uredinales) their biology and classification. Rust fungi -- Great Britain. 372 CALYPTOSPOB CALYPTOSPORA J. Kiilm. Eetercecious. Teloutospoivs intracellular, occupying the swollen epidermal cells all round the stem of the host for a considerable distance, otherwise as in Pucciniastrum. No uredo. lv-idi.-i cylindrical, with a thin peridium; aecidiospores verrucose, without germ-pores, and with no smooth spot. Calyptospora Goeppertiana Kiihn. jEcidium columnare A. et S. Consp. p. 121, pi. 5, f. 1. Peridemiium columnareS. et K.; Cooke, Handb. p. 535; Micr. Fung. p. 194,
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,
RMRH2X3K–. The British rust fungi (Uredinales), their biology and classification. Uredineae. 140 PUCCINIA Spermogones. Uredosjiores.. Fig. 92. P. Centaureae. Teleuto- sijores aud uredospore. Chiefly epiphyllous, in little clusters, orange. Sori generally hypophyllous, on yellowish or brownish spots (spots sometimes none), 2^''^'^^<^'^y rather large, secondary very minute, much scattered, pulverulent, brown; spores globose to ellipsoid, acu- leolate, brown, 22—80 x 16— 28 fi, wdth three (or two) germ- pores. Teleutospores. Sori similar, but blackish-brown; spores ellipsoid or somewhat obovate, rounde
RMRH1G7B–. The British rust fungi (Uredinales) their biology and classification. Rust fungi -- Great Britain. ::ti; MILKS|A ()n Cystopteri* ffit<iUis ( = /•'ol//podium fragile Linn.) and its v.u. dentata. June—September. Rather rare (2700 ft. on Ben Lawers); occurring freely on cultivated Cystopteris in fern-cases. (Fig. 280.) The same remarks may be made about the uredospores of this as of the previous species. In both cases it is not certain thai the teleutospores have been found in Britain, and the description is taken from Dietel ami Fischer. Dietel has shown Ann. Mycol. I.e.) that infection by
RMRH1GH2–. The British rust fungi (Uredinales) their biology and classification. Rust fungi -- Great Britain. MELAMPSORID1UM 359 spores roundish, 14—21x11—16/a, 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 j 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 /u,; epispore colourless, with distant
RMRH2T81–. The British rust fungi (Uredinales) their biology and classification. Rust fungi -- Great Britain. 296 I'm: i;mii»icm Uredospores. Sori yellow, roundish, often confluent, pul- verulent; spores ellipsoid to ovate distantly verruculose, yellow, 28—32 x21— 24 ^ Teleutospores. Sori hypophyllous, large, roundish, thick, pulvinate, black, on conspicuous purple-bordered spots; spores. Fig. 224. Ph. violaceum. a, aecidiospore; b, 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
RMRH2WTE–. The British rust fungi (Uredinales), their biology and classification. Uredineae. 162 PUCCINIA rarely observed. I have poiuted out elsewhere that it is on spring flowering plants of this kind that Micropuccinise would naturally arise (as well as on alpine plants), if they are the result of an adaptation to a shortened vegetative period. Uromyces Ficariae may be taken as another instance of a similar character. 35. Puccinia albescens Plowr. Mcidinm, albescens Grev. Fl. Edin. p. 444, Cooke, Handb. p. 536 ; Micr. Fung. p. 194. Puccinia albescens Plowr. Ured. p. 153. Fischer, Ured. Schweiz, p. 1
RMRH1J16–. The British rust fungi (Uredinales) their biology and classification. Rust fungi -- Great Britain. L82 PUfcCJNIA Teleutospores. A. Fig. 130. P. Hydrocotyles. 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 -N/z : pedicels hyaline, I liin. deciduous. On Hydrocotyle vulgaris. Rare: Kew Gardens; Epping Forest; Ireland, Co. Dublin. Uredospores, July—Sep- tember; teleutospores, October. (Fig. 130.) This species is very imperfectly known. The secidiun) is recorded onl
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
RMRH2RXC–. The British rust fungi (Uredinales), their biology and classification. Uredineae. COLEOSPORIUM 321 yEcidia on (? one of the two) leaves of Pinus austriaca, P. silvestris, May, June; ureclo- and teleutospores on Senecio Jacohaea, S. palustris, S. silvaticus, S. viscosus, S. vulgaris, all through the year; also recorded for S. pulcher, S. sarracenicus, etc., in Botanic gardens, and on cultivated Cinerarias (i.e. Senecio) at Sydenham; see Journ. Roy. Hort. Soc. 1908, xxxiii. oil. Very common. (Figs. 241, 242.). Please note that these images are extracted from scanned page images that may have b
RMRH1HB6–. The British rust fungi (Uredinales), their biology and classification. Uredineae. Fig. 167. P. Lijchnideanim. Teleutospores, on Lijchnis diurna. Fig. 168. F. Lijchiiiih-arum. Teleutospores, on Arenaria trinervis. rounded or somewhat pointed above and more or less thickened (up to 10 fi), gently constricted, rounded or attenuated below, smooth, yellowish-brown, 30—50 x 10—20 yu,; pedicels hyaline, persistent, 60—85 yu, long. > On various Caryophyllacea?, such as Dianthus barbatiis, Lychnis dimnia, L. vespertina, Arenaria trinervis, Gypsophila elegans, Sagina nodosa {?), Spergula arvensis(l
![. The British rust fungi (Uredinales) their biology and classification. Rust fungi -- Great Britain. hit; IT( < IMA "ii that plant. I am not certain that /'. punctata lives on G. Cruciata, though I think I have Been it on thai host ; the two usual species on that Qaliwm arc /'. Celakovskyana and /'. Valantiae (q.v.). The secidium seems to be less common than the other spore-forms: I have seen it on G. Mollugo, G. verum and G. uliginosum. Mesosporea have been observed on (/. paZustre, G. saxatile and G. verum. On G. saxatile the teleutospores were slightly larger than in tin- normal for Stock Photo](https://c8.alamy.com/comp/RH2WTG/the-british-rust-fungi-uredinales-their-biology-and-classification-rust-fungi-great-britain-hit-it-lt-ima-quotii-that-plant-i-am-not-certain-that-punctata-lives-on-g-cruciata-though-i-think-i-have-been-it-on-thai-host-the-two-usual-species-on-that-qaliwm-arc-celakovskyana-and-valantiae-qv-the-secidium-seems-to-be-less-common-than-the-other-spore-forms-i-have-seen-it-on-g-mollugo-g-verum-and-g-uliginosum-mesosporea-have-been-observed-on-pazustre-g-saxatile-and-g-verum-on-g-saxatile-the-teleutospores-were-slightly-larger-than-in-tin-normal-for-RH2WTG.jpg ". The British rust fungi (Uredinales) their biology and classification. Rust fungi -- Great Britain. hit; IT( < IMA "ii that plant. I am not certain that /'. punctata lives on G. Cruciata, though I think I have Been it on thai host ; the two usual species on that Qaliwm arc /'. Celakovskyana and /'. Valantiae (q.v.). The secidium seems to be less common than the other spore-forms: I have seen it on G. Mollugo, G. verum and G. uliginosum. Mesosporea have been observed on (/. paZustre, G. saxatile and G. verum. On G. saxatile the teleutospores were slightly larger than in tin- normal for Stock Photo")
RMRH2WTG–. The British rust fungi (Uredinales) their biology and classification. Rust fungi -- Great Britain. hit; IT( < IMA "ii that plant. I am not certain that /'. punctata lives on G. Cruciata, though I think I have Been it on thai host ; the two usual species on that Qaliwm arc /'. Celakovskyana and /'. Valantiae (q.v.). The secidium seems to be less common than the other spore-forms: I have seen it on G. Mollugo, G. verum and G. uliginosum. Mesosporea have been observed on (/. paZustre, G. saxatile and G. verum. On G. saxatile the teleutospores were slightly larger than in tin- normal for
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
RMREF5P4–. Comparative morphology of Fungi. Fungi. UREDINALES 579 In another direction, Uromycladium and Ravenelia have been dif- ferentiated. In the simpler forms, as Uromycladium simplex (McAlpine, 1905), there arises at each terminal cell a teliospore deceptively similar in form and structure to Uromyces (Fig. 389, 9). The basal cell changes into a double-walled, hyaline cyst c filled with a gel capable of swelling (a characteristic of both genera). Exceptionally, the cysts may be absent and replaced by a second teliospore. In other forms, e.g., U. bisporum,. Fig. 392.—Ravenelia cassiaecola. A. Infe
RMRH2W15–. The British rust fungi (Uredinales), their biology and classification. Uredineae. ON CYPERACE.E 243 jEcidiospores. i^^cidia hypophyllous, crowded on red and yellow spots, ronndish, 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, 15â21 x 14â18;i. Uredospores. Sori hypophyllous, punctiform, about ^ mm. long, on yellowish spots ; spores more or less globose, pale-brown, echinulate, 18â 22 X 17â21 fi, with three, rarely four,
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
RMRH1J00–. The British rust fungi (Uredinales), their biology and classification. Uredineae. 182 PUCCINIA Teleutospores. A. Fig. 130. P. Hydrocotyles. Teleiitospore aud uredospore. very few are found in the uredo-sori, ellipsoid to oblong, rounded at both ends, hardly thickened above, gently constricted, smooth, brown, 80—44 x 18 —28/i; pedicels hyaline, thin, deciduous. On Hydrocotyle vulgaris. Rare: Kew Gardens; Epping Forest; Ireland, Co. Dublin. Uredospores, July—Sep- tember ; teleutospores, October. (Fig. 130.) This sjiecies is very imperfectly known. The secidium is recorded only from South Ameri
RMRH2W2X–. The British rust fungi (Uredinales), their biology and classification. Uredineae. ON JUNCACE.E 237 spores ellipsoid to ovate, echinulate, pale-brown, 18—20 x 15— 22 n,; epispore rather thick, with two germ-pores. Teleatospores. Soi'i similar, but compact, pulvinate, covered or surrounded by the cleft epidermis, blackish-brown ; spores. Fig. 183. P. obscnni. Telcutospores ; two mesospores, one germinated in the sorus ; and two uredospores ; all on L. campestria. oblong, rounded, rarely truncate or conical above and thickened (5—9 fjb), gently constricted, usually attenuated below, smooth, bro
RMRH2T91–. The British rust fungi (Uredinales) their biology and classification. Rust fungi -- Great Britain. 292 l'llltAC.MIDIIM black; spores cylindrical orsubclavate, of 3 6 cells (occasionally one or two), rounded or bluntly papillate at the apex, hardly constricted, smooth, brown, 42—<S0 x 20—'IH/x: two or three germ-pores to each cell: pedicels thick, hyaline, persistent, as long as or much longer than the spores (100—loO/x). On Potentilla argentea, P. verna, and various cultivated species. April—September. Not common. (Fig. 220.) This species is more closely allied to /'. Sanguisorbae than to
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
RMRH2X1T–. The British rust fungi (Uredinales) their biology and classification. Rust fungi -- Great Britain. ON COM POSIT. K 151 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—32^; pedicels Fi8- ^ ?• Tragopogi. r L leleutospores. hyaline, short. On Tragopogon pratensis. Not uncommon. April—Sep- tember. (Fig. 103.) The mycelium arising from the infecti
RMRDTNYW–. Fungi, ascomycetes, ustilaginales, uredinales. Fungi. 112 DISCOMYCETES [CH. Humaria granulata is a common red or orange coprophilous form. The archicarp develops as a side branch from an ordinary hypha. The apical cell of this branch increases in size and becomes spherical, forming the oogonium (fig. 6^) ; it contains large numbers of well-marked nuclei. When it is full grown the oogonial nuclei fuse in pairs (fig. 68 a), and the fusion nuclei pass into the ascogenous hyphae (fig. 68 b). There is no sign of either trichogyne or antheridium.. Fig. 68. Humaria granulata Quel.; a. fusion of nuc
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
RMRH2XM9–. The British rust fungi (Uredinales) their biology and classification. Rust fungi -- Great Britain. K)2 UROMYi ES On leaves of Phaseolus vulgaris. .May. .Inly—October: even earlier on forced plants, Uncommon. (Fig. 55.) De Bary I.e. proved the genetic connection of the aecidia with the uredo- and teleutospores. The aecidia are rarely met with; they may occur either before or in company with the other spore-forms. 1 have seen no proof that they have been found in this country. The description i- founded upon that of Sydow. Fischer says that this species is rery common in Switzerland on Phaseol
RMRH1HHK–. The British rust fungi (Uredinales) their biology and classification. Rust fungi -- Great Britain. ON SAXIFRAGACE^i 213 conical papilla, marked with faint, sometimes curved, longitu- dinal stria?, pale-brown, 26—45 x 14—20 fju pedicels hyaline, slender, deciduous, not as long as the spore. On leaves and petioles of Saori- fraga granulata, S. stellaris, S. um- brosa. Rare. August. (Fig. 160.). 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 Ir
RMREF5X4–. Comparative morphology of Fungi. Fungi. UREDINALES 569 tion and plasmogamy takes place, as may occasionally happen in Puccinia malvacearum (Lindfors, 1924), at the base of the hyphal knot between two neighboring hyphal cells (Mme. Moreau, 1914) or even before the forma- tion of the telia, between two ordinary mycelial cells (Blackman and Fraser, 1906). In a fourth group, e.g., Uromyces Scillarum (Blackman and Fraser, 1906; Mme. Moreau, 1914), Puccinia Adoxae (Blackman and Fraser, 1906) and P. Aegopodii (Kursanov, 1922), plasmogamy takes place between two vegetative cells long before the form
![. Fungi, ascomycetes, ustilaginales, uredinales. Fungi. Ill] ERYSIPHALES 83 walled over its upper surface, but an oval region remains thin on the lower side. As the ripening perithecium loses water so do the appendages; the thin area below the bulb is pushed in by atmospheric pressure, the under surface becomes consequently shorter than the upper and the end of the spine is pulled down till subsequent moistening straightens it again (Harper).. Fig. 40. Perithecia of a. Erysiphe tortilis (Wallr.) Fr.; b. Mia-osphaeria sp. c Aceris (DC.) Sacc; d. Phyllactinia Corylea (Pers.) Karst.; x 120. Unci Stock Photo](https://c8.alamy.com/comp/RDTP65/fungi-ascomycetes-ustilaginales-uredinales-fungi-ill-erysiphales-83-walled-over-its-upper-surface-but-an-oval-region-remains-thin-on-the-lower-side-as-the-ripening-perithecium-loses-water-so-do-the-appendages-the-thin-area-below-the-bulb-is-pushed-in-by-atmospheric-pressure-the-under-surface-becomes-consequently-shorter-than-the-upper-and-the-end-of-the-spine-is-pulled-down-till-subsequent-moistening-straightens-it-again-harper-fig-40-perithecia-of-a-erysiphe-tortilis-wallr-fr-b-mia-osphaeria-sp-c-aceris-dc-sacc-d-phyllactinia-corylea-pers-karst-x-120-unci-RDTP65.jpg ". Fungi, ascomycetes, ustilaginales, uredinales. Fungi. Ill] ERYSIPHALES 83 walled over its upper surface, but an oval region remains thin on the lower side. As the ripening perithecium loses water so do the appendages; the thin area below the bulb is pushed in by atmospheric pressure, the under surface becomes consequently shorter than the upper and the end of the spine is pulled down till subsequent moistening straightens it again (Harper).. Fig. 40. Perithecia of a. Erysiphe tortilis (Wallr.) Fr.; b. Mia-osphaeria sp. c Aceris (DC.) Sacc; d. Phyllactinia Corylea (Pers.) Karst.; x 120. Unci Stock Photo")
RMRDTP65–. Fungi, ascomycetes, ustilaginales, uredinales. Fungi. Ill] ERYSIPHALES 83 walled over its upper surface, but an oval region remains thin on the lower side. As the ripening perithecium loses water so do the appendages; the thin area below the bulb is pushed in by atmospheric pressure, the under surface becomes consequently shorter than the upper and the end of the spine is pulled down till subsequent moistening straightens it again (Harper).. Fig. 40. Perithecia of a. Erysiphe tortilis (Wallr.) Fr.; b. Mia-osphaeria sp. c Aceris (DC.) Sacc; d. Phyllactinia Corylea (Pers.) Karst.; x 120. Unci
RMRH1JJ9–. The British rust fungi (Uredinales) their biology and classification. Rust fungi -- Great Britain. Fig. 19. Puccinia Falcariae. Con- jugation of two female cells to form the basal cell of the ascidio- spore-chain (after Dittschlag). The uppermost cell on the left in a does not belong to the others. Each fertile cell has a sterile cell above it. In b, the hist conjugate division is just com- pleted (Diagrammatic).. Fig. 20. P. Falcariae. Formation of jecidiospores (after Ditt- schlag) : a, the basal cell; b, an secidiospore-mother-cell; c, the same in the act of conjugate division (the nucleo
RMRH2T42–. The British rust fungi (Uredinales), their biology and classification. Uredineae. Fig. 230. G. clavariaeforme. ^Ecidia (Rrestelia) ou leaf, fruit and branch of Hawthorn (reduced) ; a, peridium x 16. The fruit and gall on branch are shown as they 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, brown ; spores verruculose, brownish, about 28—30 fi; 8—-10, scattered. Teleutospores. Spores collect- ed in long, cylindrical, conical, ribbon-like or tongue-shaped masses about 1 cm. long, which are at first fir
RMRDX1RB–. Fungi, ascomycetes, ustilaginales, uredinales. Fungi. Fig. 9. Sphaerotheca Humull (DC.) Burr.; a. and b. antheridium and oogonium; c. entrance of male nucleus; d. fusion in oogonium, antheridium without nucleus; e. fusion nucleus in oogonium; f. and g. septation of oogonium; h. two nuclei in ascus; i. ascus after nuclear fusion; after Harper. In 1900, Harper observed fertilization in the oogonium of Pyronema confluens; here, however, the gametangia are both multinucleate and fer- tilization consists of the fusion in pairs of a large number of male and female nuclei. Many asci are produced, e
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,
RMRH2RMT–. The British rust fungi (Uredinales), their biology and classification. Uredineae. 334 ENDOPHYLLUM Teleutospores. Sori hypophyllous, or occasionally epiphyllous, more or less covering the whole surface, crowded, secidium-like, sunk in the leaf-tissue Avhich is slightly swollen, surrounded by a thin peridium in the shape of a shallow cup, with a short.. Fig. 251. E. Euphorbiae-silraticae. a, affected leaf of E. amycjdnloides, nat. size; h, ascidio-telentospore; c, germinating spore ; d, another, not so advanced, x 540 ; e, inner, and /, outer wall of peridium-cell, x 600. torn, slightly re vol
![. Fungi, ascomycetes, ustilaginales, uredinales. Fungi. VIII] UREDINALES 20[. Fig. 172. Phragmldium speciositm Fr.; a. fertile and sterile cells; b. fusion of two fertile cells; after Christman. cells below them (Fromme '14), or each may receive a second nucleus by migration from a neighbouring vegetative cell (fig. 173). In each case they now constitute the basal cells of the rows of spores and they proceed at once to cut off aecidiospoi'e mother- cells, each of which in turn divides to separate a small intercalary cell below from the aecidiospore above. Exceptionally binucle- ate cells may b Stock Photo](https://c8.alamy.com/comp/RDX0NR/fungi-ascomycetes-ustilaginales-uredinales-fungi-viii-uredinales-20-fig-172-phragmldium-speciositm-fr-a-fertile-and-sterile-cells-b-fusion-of-two-fertile-cells-after-christman-cells-below-them-fromme-14-or-each-may-receive-a-second-nucleus-by-migration-from-a-neighbouring-vegetative-cell-fig-173-in-each-case-they-now-constitute-the-basal-cells-of-the-rows-of-spores-and-they-proceed-at-once-to-cut-off-aecidiospoie-mother-cells-each-of-which-in-turn-divides-to-separate-a-small-intercalary-cell-below-from-the-aecidiospore-above-exceptionally-binucle-ate-cells-may-b-RDX0NR.jpg ". Fungi, ascomycetes, ustilaginales, uredinales. Fungi. VIII] UREDINALES 20[. Fig. 172. Phragmldium speciositm Fr.; a. fertile and sterile cells; b. fusion of two fertile cells; after Christman. cells below them (Fromme '14), or each may receive a second nucleus by migration from a neighbouring vegetative cell (fig. 173). In each case they now constitute the basal cells of the rows of spores and they proceed at once to cut off aecidiospoi'e mother- cells, each of which in turn divides to separate a small intercalary cell below from the aecidiospore above. Exceptionally binucle- ate cells may b Stock Photo")
RMRDX0NR–. Fungi, ascomycetes, ustilaginales, uredinales. Fungi. VIII] UREDINALES 20[. Fig. 172. Phragmldium speciositm Fr.; a. fertile and sterile cells; b. fusion of two fertile cells; after Christman. cells below them (Fromme '14), or each may receive a second nucleus by migration from a neighbouring vegetative cell (fig. 173). In each case they now constitute the basal cells of the rows of spores and they proceed at once to cut off aecidiospoi'e mother- cells, each of which in turn divides to separate a small intercalary cell below from the aecidiospore above. Exceptionally binucle- ate cells may b
RMRH2TPD–. The British rust fungi (Uredinales), their biology and classification. Uredineae. ON GRAMINE.-1<: 259 On leaves, culms and glumes of Agropyrov caninum, A. repens, Brachypodium sylvaticnm, Bronius mollis and other species, Elymus aremirius, Hordeum vulgare, Secede Cereale,. Pig. 197. P. uliunaruin. a, uredo-sori and /;, teleuto-sori, on leaves, nat. size; c, teleuto-sori, on glume ; d, uiedospore; e, teleutospore. Triticum vulgnre. It is one of the few species that attack the ears, to which it does serious damage. (Fig. 197.) This is one of two forai.s originally included under the collect
RMRH2WWR–. The British rust fungi (Uredinales), their biology and classification. Uredineae. 158 PUCCINIA. Fig. 109. P. major. Te- leutospore, on C. palu- Uredospo7^es. Sori amphigenous, solitary, minute, cinnamon; spores subglobose to ovoid, distinctly echinulate, brownish, 24—30 x 21— 26yLt. 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- rfosrt ; a, ascidia on leaf of i oo ,io .. oo on
RMRDTNPJ–. Fungi, ascomycetes, ustilaginales, uredinales. Fungi. rig. 73. Humaria rutilans [¥r.)Ssii:c. iz. meta- phase of third division in ascus, x 2080; h. polar view of telophase of third division in ascus, showing eight curved chromosomes, x 3100. Fig. 74. Humaria rutilans; telo- phase of third division in ascus; after Guilliermond.. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.. Gwynne-Vaughan, Helen Charlotte Isabella (Fras
![. 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
RMRH1GGM–. The British rust fungi (Uredinales), their biology and classification. Uredineae. MELAMPSORIDIUM 359 spores roundish, 14—21x11—10/x, echinulate; episporo thinner and smoother above. Uredospores. Sori hypophyllous, Avith yellow spots showing on the upper side, collected in groups and mostly limited by the veins, each sorus scarcely j 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 /a; epispore colourless, with distant spines, often sm
RMRH2Y1R–. The British rust fungi (Uredinales) their biology and classification. Rust fungi -- Great Britain. 60 CALYPTOSPORA GOEPPERTIANA 11 can live at any rate for a Dumber of years in the Cowberry, in which the mycelium is perennial, hut in the Fir the mycelium is short-lived and perishes when the leaves prematurely fall off. In Europe only the Cowberry has been noticed as its teleuto- spore-host, but in the rnited States it is recorded on eight other specie* of Vacdnium (including V. M;/rtilhis A. (Iray); strange to say, the fungus has not yet been observed on the Fir in America. Besides Abies pec
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
![. Fungi, ascomycetes, ustilaginales, uredinales. Fungi. 138 DISCOMYCETES [CH. IV The ascocarps of many species of Tuber are edible, the most esteemed being T. nielaiiosporum. which does not occur in Britain. They grow chiefl}- ^J^%?^. Fig. 99. Tuberpuberiiliim (B. and Br.) Ed. Fisch.; -«. development of ascocarp; <?. x 52; ^. and c. X 28 ; d. and e. x 21; /". section through mature ascocarp, x 6 ; all after Bucholtz. in soils consisting of sand mixed with clay and containing iron, or in mixed alluvium; the soil must be porous to secure sufficient aeration. Truffles occur in chestnut, Stock Photo](https://c8.alamy.com/comp/RDTNFY/fungi-ascomycetes-ustilaginales-uredinales-fungi-138-discomycetes-ch-iv-the-ascocarps-of-many-species-of-tuber-are-edible-the-most-esteemed-being-t-nielaiiosporum-which-does-not-occur-in-britain-they-grow-chiefl-j-fig-99-tuberpuberiiliim-b-and-br-ed-fisch-development-of-ascocarp-lt-x-52-and-c-x-28-d-and-e-x-21-quot-section-through-mature-ascocarp-x-6-all-after-bucholtz-in-soils-consisting-of-sand-mixed-with-clay-and-containing-iron-or-in-mixed-alluvium-the-soil-must-be-porous-to-secure-sufficient-aeration-truffles-occur-in-chestnut-RDTNFY.jpg ". Fungi, ascomycetes, ustilaginales, uredinales. Fungi. 138 DISCOMYCETES [CH. IV The ascocarps of many species of Tuber are edible, the most esteemed being T. nielaiiosporum. which does not occur in Britain. They grow chiefl}- ^J^%?^. Fig. 99. Tuberpuberiiliim (B. and Br.) Ed. Fisch.; -«. development of ascocarp; <?. x 52; ^. and c. X 28 ; d. and e. x 21; /". section through mature ascocarp, x 6 ; all after Bucholtz. in soils consisting of sand mixed with clay and containing iron, or in mixed alluvium; the soil must be porous to secure sufficient aeration. Truffles occur in chestnut, Stock Photo")
RMRDTNFY–. Fungi, ascomycetes, ustilaginales, uredinales. Fungi. 138 DISCOMYCETES [CH. IV The ascocarps of many species of Tuber are edible, the most esteemed being T. nielaiiosporum. which does not occur in Britain. They grow chiefl}- ^J^%?^. Fig. 99. Tuberpuberiiliim (B. and Br.) Ed. Fisch.; -«. development of ascocarp; <?. x 52; ^. and c. X 28 ; d. and e. x 21; /". section through mature ascocarp, x 6 ; all after Bucholtz. in soils consisting of sand mixed with clay and containing iron, or in mixed alluvium; the soil must be porous to secure sufficient aeration. Truffles occur in chestnut,
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