. The British rust fungi (Uredinales), their biology and classification. Uredineae. 348 MELAMPSORA Telentospores. Sori hypophyllous, subepidermal, scattered over the leaf singly and in groups, pulvinate, \—f mm., blackish-brown, not shining; spores prismatic, rounded at both ends, 35—60 x 6—10 yu,; epispore clear-brown, 1—1^ yu, thick, scarcely thickened above, without evident germ-pore. Ca3omata on Allium Cepa, A. ursiniim and other species. May; uredo- and telentospores on Fopulus nigra, P. balsami- fera. (Fig. 260.) The descri[)tion is chiefly after Klebahn. The teleutospores mature in Febr
. The British rust fungi (Uredinales), their biology and classification. Uredineae. 348 MELAMPSORA Telentospores. Sori hypophyllous, subepidermal, scattered over the leaf singly and in groups, pulvinate, \—f mm., blackish-brown, not shining; spores prismatic, rounded at both ends, 35—60 x 6—10 yu,; epispore clear-brown, 1—1^ yu, thick, scarcely thickened above, without evident germ-pore. Ca3omata on Allium Cepa, A. ursiniim and other species. May; uredo- and telentospores on Fopulus nigra, P. balsami- fera. (Fig. 260.) The descri[)tion is chiefly after Klebahn. The teleutospores mature in February of the following year ; I find them shorter than given above, viz. 25—32 jLt, and somewhat truncate at the summit. The cteoma of species of Melam'psora on Allium is easily distinguished from the tecidiimi of Puccinia Winteriana on the same host by the absence of a peridium. (2) Melampsora Larici-populina Kleb. Caeoma Laricis Plowr. Ured. p. 262 Melampsora populina Lev. ; Plowr. Ured. p. 242 (see note, "Biology," p. 243). M. Larici-populina Kleb. in Zeitschr. f. Pflanzenkr. 1902, xii. 43. Fischer, Ured. Schweiz, p. 502, f. 316. yEcidiospores. Cseomata on hardly perceptible spots, scarcely 1 mm. long, bright yellowish-orange; spores oval or roundish, 17—22x14—18yLt; epispore 1|—2 p, thick, colourless, finely verruculose. •. Fig. 261. M. Larici-pnpulina. a, teleutospores ; &, uredospores and paraphysis. On P. ontariensist, Uredospores. Sori mostly hypophyllous, in little groups, causing yellowish angular spots on the upper side, rarely. 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, William Bywater. Cambridge, Univ. Press
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