. The British rust fungi (Uredinales), their biology and classification. Uredineae. 234 PUCCINIA Teleutospores. Sori oblong or linear, often confluent, generally on the stems, rarely on the leaves (phylloclades), blackish-brown; spores ellipsoid to clavate, thickened (up to 8 fi) and rounded above, very gently constricted, rounded below, smooth, brown, 35—52 x 17—26 /x; pedicels hyaline or brown- ish, persistent, as long as or longer than the spore; a few obovate mesospores intermixed. On Aspayxigus officinalis. ^Ecidia, not common, May; uredo- and teleutospores, September—December, rather fre
. The British rust fungi (Uredinales), their biology and classification. Uredineae. 234 PUCCINIA Teleutospores. Sori oblong or linear, often confluent, generally on the stems, rarely on the leaves (phylloclades), blackish-brown; spores ellipsoid to clavate, thickened (up to 8 fi) and rounded above, very gently constricted, rounded below, smooth, brown, 35—52 x 17—26 /x; pedicels hyaline or brown- ish, persistent, as long as or longer than the spore; a few obovate mesospores intermixed. On Aspayxigus officinalis. ^Ecidia, not common, May; uredo- and teleutospores, September—December, rather fre- quent. (Fig. 180.) Fischer points out that the connection between the secidium and the other spore-forms has not yet been demonstrated. This disease is often very destructive to asparagus beds ; all diseased shoots should be gathered and burnt. The best means of prevention is by the selection of resistant varieties, and the avoidance of overcrowding. Distribution : Europe, Abyssinia, North America. 103. Puccinia Liliacearum Duby. Puccinia Liliacearum Duby, Bot. Gall. ii. 891. Plowr. Ured. p. 197. Sacc. Syll. vii. 668. Sydow, Monogr. i. 627. Fischer, Ured. Schweiz, p. 76, 545, f. 57. Sperniogones. Numerous, especially at the apex of the affected leaves, yellowish, conical. \_^Ecidiospores. ^cidia few, scattered, minute, deeply im- mersed, whitish, the narrow opening onl}^ pro- jecting; spores minutely verruculose, orange, about 15—20/A.] Teleutospores. Sori amphigenous, embedded in the dried yellowish parts of the leaf, hemi- spherical, densely crowded, often confluent, long covered by the ashy-grey epidermis w'hich at length opens by a cleft, then naked, pulverulent, reddish-brown; spores oblong-fusiform or cla- vate, not thickened above and rounded or fre- quently somewhat narrowed, not constricted, indeed broadest at the septum, attenuated below, smooth, pallid-brown, 40—75 x 22—35 fx; pedi- cels hyaline, thick, rather Fi-. 181. P. Liliacearum. Teleutospo
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