. Cryptogamic plants of the USSR. (Flora sporovykh rastenii SSSR). Plants. 255 Syn. : Melampsoridixun alni (non Diet.); Syd., Monogr. Ured. Ill, 1915, p. 430, , tab. XVIII. fig. 158; Wilson, Trans. Brit. Mycol. Soc. IX, 1924, p. 140; Trans. Bot. Soc. Edinb. XXXI. 1934, p. 425; Arth., Fl. VII, 1925, , ; Manual Rusts a. Canada, 1934, p. 23, fig. 33. Biol. Hiratsuka, , 193(5. Spermagonia and aecia as in Melampsoridium alni. Uredia hypophyllous, scattered or in groups producing reddish-brown spots on the upper side of leaves, small, — mm across, orange-yellow,
. Cryptogamic plants of the USSR. (Flora sporovykh rastenii SSSR). Plants. 255 Syn. : Melampsoridixun alni (non Diet.); Syd., Monogr. Ured. Ill, 1915, p. 430, , tab. XVIII. fig. 158; Wilson, Trans. Brit. Mycol. Soc. IX, 1924, p. 140; Trans. Bot. Soc. Edinb. XXXI. 1934, p. 425; Arth., Fl. VII, 1925, , ; Manual Rusts a. Canada, 1934, p. 23, fig. 33. Biol. Hiratsuka, , 193(5. Spermagonia and aecia as in Melampsoridium alni. Uredia hypophyllous, scattered or in groups producing reddish-brown spots on the upper side of leaves, small, — mm across, orange-yellow, covered by hemispherical peridia consisting of minute angular cells; ostiolar cells larger, — long, extending into elongate sharp echinules. Urediospores globoid, subgloboid, ovoid, or ellipsoid, — X —^^; walls colorless, sparsely echinulate over entire surface; conspicuous rudimentary fusiform paraphyses (according to Hiratsuka) (Figure 67). Telia hypophyllous, subepidermal, scattered or in groups, yellow, later dark brown. Teliospores prismatic, light brown, 32 .4— X —; walls, about 1/u thick. Distinguished from the closely related M. alni by larger urediospores. On species of Alnus of section Gymnothyrsus, aecia on Larix. In the Soviet Far East and in Japan. On Alnus hirsuta Turcz. (= var. hirsuta Spach)—FAR EAST: (Amur Region, Bureya Mts., Sutar River valley at the Ljoibavinskii mine), Uss. (Maritime Territory: near Shkotovo and along the Mongugai River, Pos'et District), Sakh. (S Sakhalin). On Alnus japonica Sieb. et Zucc. — FAR EAST: Maritime Territory, near Shkotovo.— In same locality on hybrids of the two species (A. hirsuta X A. japonica). Apparently, the same fungus is found also in Scotland on Alnus incana Willd. and A. glutinosa Gaertn., as well as on species of Alnus in North and Central America, from California to Guatemala, and in South America in Equador. Aecia were obtained in cul
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