. The British rust fungi (Uredinales), their biology and classification. Uredineae. ON CRASSULACE^ 211 Teleutospores. Sori amphigenous or on the stems, but generally hypophyllous, scattered or crowded and confluent, minute, roundish, surrounded by the torn epidermis, pulverulent, dark- brown ; spores broadly ellipsoid, depressed, rounded at both ends, scarcely thickened above, not constricted, smooth, dark chest- nut-brow^n, 20—35 x 17—24 /i : pedicels hyaline, about as long as the spore; spores occasionally three-celled, like Fig. 157. P. Rhodiolae. Teleuto- spores, from Glen C
. The British rust fungi (Uredinales), their biology and classification. Uredineae. ON CRASSULACE^ 211 Teleutospores. Sori amphigenous or on the stems, but generally hypophyllous, scattered or crowded and confluent, minute, roundish, surrounded by the torn epidermis, pulverulent, dark- brown ; spores broadly ellipsoid, depressed, rounded at both ends, scarcely thickened above, not constricted, smooth, dark chest- nut-brow^n, 20—35 x 17—24 /i : pedicels hyaline, about as long as the spore; spores occasionally three-celled, like Fig. 157. P. Rhodiolae. Teleuto- spores, from Glen Callater (ex herb. Berkeley). On Seduvi Rhodiola {roseiim). Very rare. July, 1844 (W. Gardiner). (Fig. 157.) Distribution : Norway. Glen Callater, 81. Puccinia Umbilici Guep. Puccinia L'rnhilici Guep. in Duby, Bot. Gall. ii. 890. Cooke, Handb. p. 505 ; Micr. Fuug. p. 211, pi. 4, f. 80—1. Plowr. Ured. p. 204. Sacc. Syll. vii. TOO. Sydow, Monogr. i. 492, f. 403. Teleutospores. Sori amphigenous or on the petioles, on yellowish spots, minute, roundish, usually circinate, at length confluent and forming large orbicular clusters up to 1 cm. diain., at first compact, then pulverulent, dark reddish-brown; spores broadly ellipsoid or subglobose, rounded at both ends, not thickened above but surmounted by a minute subhyaline apiculus or pore-cap, not constricted, smooth, bright chestnut- brown, 28—32 X 18—26 [x, the cells often depressed { broader than long) and frequently oblique ; pedicels short, hyaline. On Cotyledon Umbilicus. Locally common. May and June ; in mild localities it can be found even as early as January. (Fig. 158.). 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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