. Cryptogamic plants of the USSR. (Flora sporovykh rastenii SSSR). Plants. Hyalopsora filicum Diet., Engler's bot. Jahrb. XXXVII, 1905, ; Diet., Ann. mycol. V, 1907, p. 76; Syd., Monogr. Ured. Ill, 1915, p. 498. Hyalopsora asplenii-Wichurae Diet., Ann. mycol. VI, 1908, ; Sacc, Sylloge, XXI, 1912, p. 599; Syd., Monogr. Ured. Ill, 1915, p. 499. Biol. Dietel. Ann. mycol. IX, p. 530; Bartholomew, Bull. Torrey Bot. Club, XLIII, 1916, p. 195, fig. 1—3; Moss, Ann. Bot. XL, 1926. p. 816, text fig. 2, 2IB, tab. XXXIV fig. 1,25,26. Spermagonia and aecia unknown. Uredia hypophyllous and petioli
. Cryptogamic plants of the USSR. (Flora sporovykh rastenii SSSR). Plants. Hyalopsora filicum Diet., Engler's bot. Jahrb. XXXVII, 1905, ; Diet., Ann. mycol. V, 1907, p. 76; Syd., Monogr. Ured. Ill, 1915, p. 498. Hyalopsora asplenii-Wichurae Diet., Ann. mycol. VI, 1908, ; Sacc, Sylloge, XXI, 1912, p. 599; Syd., Monogr. Ured. Ill, 1915, p. 499. Biol. Dietel. Ann. mycol. IX, p. 530; Bartholomew, Bull. Torrey Bot. Club, XLIII, 1916, p. 195, fig. 1—3; Moss, Ann. Bot. XL, 1926. p. 816, text fig. 2, 2IB, tab. XXXIV fig. 1,25,26. Spermagonia and aecia unknown. Uredia hypophyllous and petiolicolous, scattered, round to ellipsoid, orange-yellow, covered by indistinct peridium of small colorless cells. Urediospores of two kinds, with yellow contents, l) oblong-ellipsoid, clavoid, pyriform, often irregular, angular or even flexed, 22 — 30 (35) X 8 — 16 {20)ij; spore wall colorless, —1 .5/lz thick, evenly covered by inconspicuous warts, with 4 equatorial, indistinct pores; 2) amphispores short-ellipsoid, slightly angular and irregular, 22 —29 —(38)X (l7) —20 — 22 —(2 9)/u; spore wall colorless, thicker than in spores of the first kind, about 2 — 5/Li; warts smaller, dispersed at approximately 2 jU intervals; spores with 6 — 8 readily perceptible pores; spore forms intermediate between the two described are also encountered. Telia found in the spring, hypophyllous, on yellow-brownish patches of indefinite extent. Teliospores intraepidermal, often filling the cells, sometimes in two layers, round or angular due to reciprocal pressure, dividing crosswise along the axis into 2 or several cells, 14 —1 8/u across; walls thin, colorless, with one pore at the upper end (Figure 36). Spermagonia and aecia probably on species of Abies; still unknown. Uredio- and teliospores on species of Cystopteris in Europe, Asia, and North America, on species of Woodsia in North America and the USSR. Hiratsuka added to the species H. polypodii described by Dietel th
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