. The British rust fungi (Uredinales) their biology and classification. Rust fungi -- Great Britain. ON PLUMBAGINACE^E 89 This species was formerly united with C. Armeriae (), but the teleutospores are distinctly different. Distribution : Europe, North Africa, Siberia and North America. 4. Uromyces Armeriae Lev. Caeoma Armeriae Schlechtd. Fl. Berol. ii. 126. Uromyces Armeriae Lev. Ann. Sri. Nat. ser. 3, viii. 375. Sydow, Monogr. ii. 40. Fischer, Ured. Schweiz, p. 52, f. 39. U. Limonii Plowr. Ured. p. 122 Sacc. Syll. vii. 532 Spermogones. Scattered among the a?cidia, honey-coloure
. The British rust fungi (Uredinales) their biology and classification. Rust fungi -- Great Britain. ON PLUMBAGINACE^E 89 This species was formerly united with C. Armeriae (), but the teleutospores are distinctly different. Distribution : Europe, North Africa, Siberia and North America. 4. Uromyces Armeriae Lev. Caeoma Armeriae Schlechtd. Fl. Berol. ii. 126. Uromyces Armeriae Lev. Ann. Sri. Nat. ser. 3, viii. 375. Sydow, Monogr. ii. 40. Fischer, Ured. Schweiz, p. 52, f. 39. U. Limonii Plowr. Ured. p. 122 Sacc. Syll. vii. 532 Spermogones. Scattered among the a?cidia, honey-coloured. sEcidiospores. yEcidia amphigenous, scattered or in small clusters, at first hemispherical, then cup-shaped, with a whitish incised margin; spores minutely verruculose, yellow, 17—28x 16—22^. Uredospores. Sori amphigenous, sometimes on purplish spots, rounded or elongated, surrounded or half-covered by the cleft epidermis, pulverulent, cinnamon; spores globose to oval, very densely and minutely verruculose, yellowish-brown, 24—32 x 21—28 /a ; epispore 2|—3 /x thick, with two or three germ-pores. Teleutospores. Sori similar, dark-brown; spores globose to ovate, rounded and thickened (7 /jl) at the apex, with a broad flat cap, usually rounded below, smooth, brown, 24—36 x 21—32 /x : pedicels hyaline, nearly as long as the spore, seldom persistent. On leaves and peduncles of Armeria maritima. Not uncommon. iEcidia in May and June; uredospores from June onwards; a few teleutospores begin to appear in the uredo-sori towards the end of July. (Fig. 41.) This species was united by Plowright with U. Limonii, but is distin- guished by the more readily pulverulent sori, the shorter and broader teleutospores, and the shorter hyaline pedicel which is easily detached. The distinctness of the two species does not seem, however, to have been tested by experimental cultures. Though the uredo- and teleutospores. Fi<^. 41. U. Armeriae. Teleutospore and
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