. The British rust fungi (Uredinales) their biology and classification. Rust fungi -- Great Britain. 158 PUCCINIA. Fig. 109. P. major. Te- leutospore, on C. palu- dosa ; </. jecidia on leaf of same, x A. Uredospores. Sori amphigenous, solitary, minute, cinnamon; spores subglobose to ovoid, distinctly echinulate, brownish, 24—30 x 21— 26 fx. Teleutospores. .Sori chiefly hypo- phyllous, similar, but blackish-brown. standing singly, scattered over nearly the whole leaf-surface; spores ellipsoid to ovoid, rounded at both ends, not thickened above, hardlv constricted, veiy delicately verruculose
. The British rust fungi (Uredinales) their biology and classification. Rust fungi -- Great Britain. 158 PUCCINIA. Fig. 109. P. major. Te- leutospore, on C. palu- dosa ; </. jecidia on leaf of same, x A. Uredospores. Sori amphigenous, solitary, minute, cinnamon; spores subglobose to ovoid, distinctly echinulate, brownish, 24—30 x 21— 26 fx. Teleutospores. .Sori chiefly hypo- phyllous, similar, but blackish-brown. standing singly, scattered over nearly the whole leaf-surface; spores ellipsoid to ovoid, rounded at both ends, not thickened above, hardlv constricted, veiy delicately verruculose, chestnut- brown, 33—48 x 22—30 /x ; epispore thin: pedicels short, deciduous. On Crepis paludosa. .Ecidia in June: uredospores, mixed with teleutospores, August and September. Yorkshire (Sop- pitt), Braemar (Trail), Dolgelly, Wales, and in Ireland. (Fig. 109.) This species was formerly considered a variety (major) of P. Lapsanae on account of the larger spores, but is now kept separate. Dietel proved by cultures that the uredo- and teleutospores are connected with the aecidial generation. From P. Crepidis, on Crepis vrrens, it is said to be distinguished, not only by the size of the spores, but also by the difference in the way in which the secidia occur on the leaves ; the minute, black, solitary teleuto-sori seem also different. Distribution : Northern and Central Europe. 32. Puccinia Hieracii Mart. Credo Hierorii Schum. Enum. PI. Sail. ii. 232. TrirhoLasis Hieracii Cooke, Micr. Fung. p. 224 Puccinia Hieracii Mart. Fl. Mosquen. p. 226. Cooke, Micr. Fung. p. 207 Plowr. Ured. p. 184, p. min. p. Sacc. Syll. vii. 633 Sydow, Monogr. i. 95. Fischer, Ured. Schweiz, p. 230, f. 181. Bpermogones. In little yellowish clusters on leaves and stems. Uredospores. Sori amphigenous, usually epiphyllous, on pale spots which are sometimes hardly perceptible, scattered, scarcely confluent, minute, punctiform, soon naked, pulverulent,. Please note that these images are ex
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