. The British rust fungi (Uredinales), their biology and classification. Uredineae. 86 UROMYCES The species are arranged according to the families to which the hosts belong: see Puccinia. This genus is often considered the most highly (at least the latest) evolved of the Uredinales; but 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. PI. Sail. ii. 233. jEcidium Valerianearum Duby, Bot. Gall. ii. 008. Cooke, Handb. p. 540; Micr. Fung. p. 196. Lecythea Valerianae Berk
. The British rust fungi (Uredinales), their biology and classification. Uredineae. 86 UROMYCES The species are arranged according to the families to which the hosts belong: see Puccinia. This genus is often considered the most highly (at least the latest) evolved of the Uredinales; but 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. PI. Sail. ii. 233. jEcidium Valerianearum Duby, Bot. Gall. ii. 008. Cooke, Handb. p. 540; Micr. Fung. p. 196. Lecythea Valerianae Berk.; Cooke, Handb. p. 532; Micr. Fung. p. 222. Uromyces Valerianae Fckl. Symb. Myc. p. 63. Plowr. Ured. p. 128. Sacc. Syll. vii. 536. Sydow, Monogr. ii. 19. Fischer, Ured. Schweiz, p. 54, f. 41. Spermogones. Epiphyllous, in small clusters, honey- coloured, turning black. jEcidiospores. yEcidia hypophyllous, and often on the nerves, petioles and stalks, seated on pale thickened spots, densely aggregated or circinate, cup-shaped, whitish-yellow; margin revolute and torn ; spores covered with minute crowded warts, yellow, 18—25 x 16—20 fi. Uredospores. Sori amphigenous, usually on indefinite yellow spots, scattered or aggregated here and there, minute, punctiform,. pulverulent, brown;. spores globose to broadly ellipsoid, verrucose-echinulate, yellowish-brown or brown, 21^— 28 /i,; epispore 2|—3 p, thick, with two or three germ-pores. Teleatospores. Sori similar, but longer covered by the epidermis, dark-brown; spores ellip- soid or ovate, with a flat subhyaline papilla at the summit, smooth, pale clear-brown 20—30 x 13 —21 /i; epi- spore thin, scarcely thickened above ; pedicels short, thin, hyaline, rather. Fig. 38. U. Valerianae. Teleu- tospores and iiredospore (the latter viewed dry) on V. offici- nalis. deciduous. On Valeriana dioica, V. offici- nalis. ^Ecidia in May and June; uredospores from June, teleutospores from July to October. Common. (Fig. 38.) '. Please no
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