. The British rust fungi (Uredinales) their biology and classification. Rust fungi. 138 PUCCINIA On Garlinavulgaris. July—October. Not common. (Fig. 89.) Distinguished from P. Cirsii, which it much resembles, by the larger uredospores, with very dehcate hardly perceptible spines, and by the slightly smaller teleutospores which are more frequently narrowed below. But no cultures seem to haye been made to prove their distinctness. Distribution : Central and Northern Europe. 11. Fuccinia Bardanae Corda. Pucdnia Eieracii Plowr. Ured. p. 184 P. Bardanae Corda, Icones, iv. 17. Sydow, Monogr. i.
. The British rust fungi (Uredinales) their biology and classification. Rust fungi. 138 PUCCINIA On Garlinavulgaris. July—October. Not common. (Fig. 89.) Distinguished from P. Cirsii, which it much resembles, by the larger uredospores, with very dehcate hardly perceptible spines, and by the slightly smaller teleutospores which are more frequently narrowed below. But no cultures seem to haye been made to prove their distinctness. Distribution : Central and Northern Europe. 11. Fuccinia Bardanae Corda. Pucdnia Eieracii Plowr. Ured. p. 184 P. Bardanae Corda, Icones, iv. 17. Sydow, Monogr. i. 113. Fischer, Ured. Schweiz, p. 221, f. 173. .Spermogones. Similar to those of P. Girsii. Uredospores. Sori of two kinds; primary epiphyllous, on discoloured rounded or irregular spots, in concentric rings round the spermo- gones, sometimes confluent, 1—5 mm. broad, flat, surrounded by the cleft epidermis, pulverulent, cinnamon;. secondary amphigenous, without spots, about ^—1 mm. diam., scattered or gregarious; spores globose to ellipsoid, echinulate, pale-brown, 26—30 x 22— 27 /u,, with three (rarely four) germ- pores. Teleutospores. Sori amphigenous, generally hypophyllous, without spots, scattered or in places densely gregarious, ^—1 mm. diam., rounded, pulverulent, black-brown; spores ellipsoid, rounded at both ends, not thickened, gently constricted, delicately verruculose, dark-brown, 80—42 x 22—27 ytt; pedicels hyaline, short. On Arctium Lappa. September, October. A doubtful native; I have seen no British specimens. Description after Sydow. (Fig. 90.) Distinguished from P. Ci'r^i by its larger teleutospores and by its two kinds of uredo-sori. Jacky demonstrated the distinctness of the two species by experimental cultures (Centralbl. f. Bakt. 2. ix. 796) ; also that P. Bardanae could not be transferred to Taraxacum. Distribution : Europe Fig. 90. p. Bardanae. Te- leutospores, on A. Lappa (Austria).. Please note that these images are extracted from
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