. The British rust fungi (Uredinales) their biology and classification. Rust fungi. 314 CEONAETIUM C. flaccidwm Wint. Pilze, i. 236 (1884). Plowr. Ured. p. 254. Sacc. Syll. vii. 598. Peridermium Cornui Kleb. Zeitschr. f. Pflauzenkr. 1892, ii. 269, pi. 5, f. 2. -^cidiospores. Jilcidia (P. Cornui) erumpent from the bark, forming large reddish-yellow bladders, generally occupying a portion of a branch in large numbers; spores ellipsoid, 22—26 X 16—20/x; epispore 3—4> fi thick, verrucose, thinner on part of its surface and there smooth or somewhat reticulate. Uredospores. Sori small, pustular,
. The British rust fungi (Uredinales) their biology and classification. Rust fungi. 314 CEONAETIUM C. flaccidwm Wint. Pilze, i. 236 (1884). Plowr. Ured. p. 254. Sacc. Syll. vii. 598. Peridermium Cornui Kleb. Zeitschr. f. Pflauzenkr. 1892, ii. 269, pi. 5, f. 2. -^cidiospores. Jilcidia (P. Cornui) erumpent from the bark, forming large reddish-yellow bladders, generally occupying a portion of a branch in large numbers; spores ellipsoid, 22—26 X 16—20/x; epispore 3—4> fi thick, verrucose, thinner on part of its surface and there smooth or somewhat reticulate. Uredospores. Sori small, pustular, surrounded by a peridium which opens at the summit with a pore; spores ellipsoid or ovate, sparsely echinulate, 21—24 x 17—21 Fig. 238. C. asclepiadeum. a, Peridermium Cornui on branch of Pine; b, teleuto-sori on leaf of Peony (reduced); c, uredospore x 600; d, part of a column of teleutospores x 300. Teleutospores. Sori cylindrical, often curved, arranged in large clusters, over 1 mm. high, brown, at length horny, compact; spores ellipsoid or cylindrical-oblong, reaching 56 /j, long and 14 /j, broad; epispore thin, slightly thicker above. ^cidia on the branches of Pinus silvestris, May, June; uredo- and teleutospores on Paeonia officinalis in gardens, July—October. Very uncommon. (Fig. 238.) It has been proved by the researches of Cornu, Klebahn, Fischer and many others, not only that the remarkable secidia on Pine are genetically connected with the other spore-forms on Peony, but also that they can. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Grove, W. B. (William Bywater), 1848-1938. Cambridge, University Press
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