. The British rust fungi (Uredinales), their biology and classification. Uredineae. ON PLUMIJAGINACE^ 89 This species was formerly united with U. Armeriae (), l)ut the teleutospores are distinctly different. Distribution : Europe, North Africa, Siberia and North America. 4. Uromyces Armeriae Lev. C'xeoma Armeriae Schlechtd. Fl. Berol. ii. 126. Uromyces Armenae Lev. Ann. Sci. Nat. ser. 3, viii. 375. Sydow, Monogr. ii. 40. Fischer, Ured. Schweiz, p. 52, f. 39. U. Limoiiii Plowr. Ured. p. 122 Sacc. Syll. vii. 532 Spermo(]ones. Scattered among the .'pcidia, honey-coloured. jJhidiospo
. The British rust fungi (Uredinales), their biology and classification. Uredineae. ON PLUMIJAGINACE^ 89 This species was formerly united with U. Armeriae (), l)ut the teleutospores are distinctly different. Distribution : Europe, North Africa, Siberia and North America. 4. Uromyces Armeriae Lev. C'xeoma Armeriae Schlechtd. Fl. Berol. ii. 126. Uromyces Armenae Lev. Ann. Sci. Nat. ser. 3, viii. 375. Sydow, Monogr. ii. 40. Fischer, Ured. Schweiz, p. 52, f. 39. U. Limoiiii Plowr. Ured. p. 122 Sacc. Syll. vii. 532 Spermo(]ones. Scattered among the .'pcidia, honey-coloured. jJhidiospores. ^Ecidia amphigenous, scattered or in small clusteis, at first hemispherical, then cup-shaped, with a whitish incised margin ; spores densel}- and minutely verruculose, yellow, 17_28x 16—22/x. 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 fx ; epispore 2^-3 ^Ju thick, with two or three germ-pores. Teleutospof-es. Sori similar, dark-brown; spores globose to ovate, rounded and thickened (7 fx) at the apex, with a broad flat cap. usually rounded below, smooth, brown, 24—36 X 21—32 fl: pecticels hyaline, nearly as long as the spore, seldom persistent. On leaves and peduncles of Arnieria maritima. Not uncommon. /Ecidia in May and June: ur«dospores from June ,, ,^ , •^ . ' . Fig- 41. V- Armevtae. onwards ; a few teleutospores begin to Teleutospoie ami appear in the uredo-sori towards the end metospoie. of July. (Fig. 41.) \ This species was united by Plowright with U. Limonii, but is distin- guished by the more readilj^ pulverulent sori, the shorter and broader teleutospores, and the short^- hyaline pedicel which is easily detached. The distinctness of the two s)»ecies does not seem, however, to have been tested by experimental cultures. Though the uredo- and teleut
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