. The British rust fungi (Uredinales) their biology and classification. Rust fungi -- Great Britain. ON LEGUMIXOS/E 91 (!. Uromyces Trifolii-repentis Liro. U. Trifolii-repentis Liro, Act. Soc. Faun. Flor. Fenn. xxix. 15. Sydow, Monogr. ii. 131. Fischer, Ured. Schweiz, p. 23, f. 19. U. Trifolii Plowr. Ured. p. 124 Sacc. Syll. vii. 534 McAlpine, Rusts of Australia, p. 97, f. 142, & pi. G, f. 32. Trichobasis fallens Cooke, Micr. Fung. p. 226 Puccinia fallens Cooke, Handb. p. 508 Nigredo Trifolii Arthur, N. Amer. Fl. vii. 255. Spermogones. Epiphyllous, honey-coloured, formi
. The British rust fungi (Uredinales) their biology and classification. Rust fungi -- Great Britain. ON LEGUMIXOS/E 91 (!. Uromyces Trifolii-repentis Liro. U. Trifolii-repentis Liro, Act. Soc. Faun. Flor. Fenn. xxix. 15. Sydow, Monogr. ii. 131. Fischer, Ured. Schweiz, p. 23, f. 19. U. Trifolii Plowr. Ured. p. 124 Sacc. Syll. vii. 534 McAlpine, Rusts of Australia, p. 97, f. 142, & pi. G, f. 32. Trichobasis fallens Cooke, Micr. Fung. p. 226 Puccinia fallens Cooke, Handb. p. 508 Nigredo Trifolii Arthur, N. Amer. Fl. vii. 255. Spermogones. Epiphyllous, honey-coloured, forming minute clusters. JEcidiospores. iEcidia hypophyllous, in clusters, roundish on the leaves and as much as 5 mm. long on the nerves and petioles, shortly cylindrical, whitish-yellow; margin white, torn, hardly revolute; spores minutely verruculose, yellowish, 17— 21 x 14—18 fi. Uredospores. Sori hypophyllous and on the petioles, scattered over the leaves or gregarious, small or rarely confluent and larger, soon naked, pulverulent, pale-brown ; spores globose, ovate or ellipsoid, echinulate, yellow-brown, 19—26 x 17—24 /m ; epispore about Hyu, thick, with two to four (generally two) equatorial germ-pores. Teleutospores. Sori surrounded by the cleft epidermis, similar, but elongated on the petioles, and darker brown; spores globose to ovate, rounded at the apex, with a very small hyaline papilla, smooth or at times bearing a few minute warts arranged more or less in lines, brown, 18—30 x 16—25/*; epispore about 2fi thick; pedi- cels short, thin, hyaline, decidu- Fit;. 43. U. Trifolii-repentis. a, secidia on young leaf; b, urerto- aml teleuto-sori, on later-formed leaf. On leaves and petioles of Trifolium repens. iEcidia (rare) from April and uredospores from May onwards. (Fig. 43.) This species is distinguished from U. Trifolii Lev. by the smaller number of germ-pores of the uredo, and also by the presence of the secidia, which cause long crooked swellings on t
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