. Cryptogamic plants of the USSR. (Flora sporovykh rastenii SSSR). Plants. sowings of teliospores on Abies alba, Picea excelsa and Larix decidua were ineffective because of unsuitable material. Fraser reported abundant development of telio- and urediospores in the northeastern part of North America, but failed to germinate teliospores; the fungus overwinters in the urediospore stage. 225. 3. Puc ciniastrum potentillae Kom. ex Tranz., Jacz., Kom., Fungi Rossiae exs. No. 327, 1899 et in Hedwigia, XXXIX, 1900, S. (l27); Sacc, Sylloge, XVI, 1902, p. 319; Syd., Monogr. Ured. Ill, 1915, p. 449; Arth
. Cryptogamic plants of the USSR. (Flora sporovykh rastenii SSSR). Plants. sowings of teliospores on Abies alba, Picea excelsa and Larix decidua were ineffective because of unsuitable material. Fraser reported abundant development of telio- and urediospores in the northeastern part of North America, but failed to germinate teliospores; the fungus overwinters in the urediospore stage. 225. 3. Puc ciniastrum potentillae Kom. ex Tranz., Jacz., Kom., Fungi Rossiae exs. No. 327, 1899 et in Hedwigia, XXXIX, 1900, S. (l27); Sacc, Sylloge, XVI, 1902, p. 319; Syd., Monogr. Ured. Ill, 1915, p. 449; Arth., Fl. VII, 1925, p. 676; Hirats., Monogr. Pucciniastrum, 1927, p. 91, tab. I, ; Arth., Manual Rusts U. S. a. Canada, 1934, p. 14, fig. 22; Hirats., Monogr. Pucciniastreae, 1936, p. 237; Tranzschel, Consp. Ured. URSS, Moscow, 1939, p. 227. Spermagonia and aecia unknown. Uredia hypophyllous, scattered or in groups, frequently covering extensive areas of the leaves, round, minute, — mm across, yellow, covered by hemispherical peridium; peridial cells small, thin-walled, smooth; cells at the peridial pore large, thick-walled, sparsely echinulate or smooth. Urediospores broad-ovoid, ellipsoid or globoid, 14 —20 X 12 — ISjU ; walls colorless, thin and rarely echinulate; contents yellow (Figure 46). Telia hypophyllous, subepidermal, producing small reddish-brown patches. Teliospores inter- cellular, globoid or ellipsoid, 2- to 4-celled, 14 —26 X 15 —20/Lz; walls brown; develop in September-October. On species of Potentilla. In Japan on P. centigrana Max. and P. cryptotaeniae Maxim., in eastern Canada and the northeastern on Sol. (= Sibbaldiopsis tridentata Rydb.). General distribution: eastern Asia, northeastern North America. On Potentilla fragarioides L.— W SIBERIA: Alt. (Oirot [Gorno-Altai] Autonomous Region: Chemal village); FAR EAST: Uss. (Maritime Territory, frequent), Kamch., Sakh. (S Sakhalin). On Potentilla freyniana Bornm.
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Keywords: ., bookcentury1900, bookcollectionbiodiversity, booksubjectplants
