. Cryptogamic plants of the USSR. (Flora sporovykh rastenii SSSR). Plants. FIGURE 57. Thekopsora myrtilll (Schum.) Tranz, on Vaccinium mynillus L. Urediospores, x 600. (Orig.) 242 Biol. Clinton, Rep. Conn. Agric Exper. Sta. 1909 — 1910, 1911,p. 719; Fraser, Mycologia, IV, 1912, ; V, 1913; ; VI, 1914, Spermagonia hypophyllous, numerous, scattered, intercellular in the epidermis, inconspicuous, low, flat, small, 65 —12 5/u wide, 20 —26/u high. Aecia hypophyllous, on local mycelium, in 2 rows on yellow patches involving part or, usually, the entire leaf, cylindrical, small, —0.
. Cryptogamic plants of the USSR. (Flora sporovykh rastenii SSSR). Plants. FIGURE 57. Thekopsora myrtilll (Schum.) Tranz, on Vaccinium mynillus L. Urediospores, x 600. (Orig.) 242 Biol. Clinton, Rep. Conn. Agric Exper. Sta. 1909 — 1910, 1911,p. 719; Fraser, Mycologia, IV, 1912, ; V, 1913; ; VI, 1914, Spermagonia hypophyllous, numerous, scattered, intercellular in the epidermis, inconspicuous, low, flat, small, 65 —12 5/u wide, 20 —26/u high. Aecia hypophyllous, on local mycelium, in 2 rows on yellow patches involving part or, usually, the entire leaf, cylindrical, small, — mm across, — high; peridium readily falling apart; peridial cells delicate, slightly overlapping, outer walls very tfiin, smooth, inner walls 4 —5^ thick, moderately verrucose. Aeciospores globoid or broad-ellipsoid, 18 —27X 15 —21/Lj; outer walls colorless, thin, 1 — , finely and evenly verrucose. Uredia hypophyllous, scattered or in groups, round, yellowish-brown; peridia hemispherical, covered by the epidermis, of small, smooth cells; ostiolar cells of peridium higher, rather thickened, smooth, gradually shorter and thinner-walled toward the peridial base. Urediospores ovoid, ellipsoid or subgloboid, 16 —30 X 13 —19/u; outer wall colorless, rarely echinulate; contents yellow (Figure 57). Telia hypophyllous, small, brown. Teliospores intracellular intraepidermal, globoid to ellipsoid, 14—23|u across, longitudinally dividing into 2 — 4 cells; outer wall smooth, evenly punctate, light yellow. On species of Vaccinium in Europe, Asia (as far as the Kuril Is. and Kamchatka), and North America. In North America also on other genera: Oxycoccus, Gaylussacia, Andromeda (Pieris, Xolismia), Menziesia, Rhodora, Azalea. Aecia on Tsuga. Hiratsuka, Journ. Facult. Agric. Hokkaido Univ., XXI, 1927, p. 18 ff., distinguished, according to Karsten,the fungus on Vaccinium vitis-idaea with the larger uredia (— across) from fungi on other specie
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Keywords: ., bookcentury1900, bookcollectionbiodiversity, booksubjectplants
