. The British rust fungi (Uredinales) their biology and classification. Rust fungi. ON COMPOSITiE 187 Teleutospores. Sori amphigenous, on brown orbicular spots, densely gregarious and confluent in roundish clusters, 3—6 mm. broad, occupying the whole spot, often circinate, long covered by the epidermis, at length rather pulverulent, deep-brown; spores ovate to oblong, with a very minute paler apical papilla, hardly constricted, rounded or slightly attenuated below, smooth, pale-brown, 30—45 x 16—24/x; pedicels hyaline, very short. On Senecio Jacobaea. August—November. Not common. Closely allie
. The British rust fungi (Uredinales) their biology and classification. Rust fungi. ON COMPOSITiE 187 Teleutospores. Sori amphigenous, on brown orbicular spots, densely gregarious and confluent in roundish clusters, 3—6 mm. broad, occupying the whole spot, often circinate, long covered by the epidermis, at length rather pulverulent, deep-brown; spores ovate to oblong, with a very minute paler apical papilla, hardly constricted, rounded or slightly attenuated below, smooth, pale-brown, 30—45 x 16—24/x; pedicels hyaline, very short. On Senecio Jacobaea. August—November. Not common. Closely allied to the preceding species, but said to be distinguished by its paler, narrower and longer spores whicli are provided with a smaller apical papilla. Moreover, the sori are said to be less dark in colour (not darker as Plowright states), and are distributed more uniformly on both leaf-surfaces. Nevertheless, I suspect they are identical. Distribution: Belgium. 10. Puccinia Carlinae Jacky. Fuccinia Hieraeii Mart. ; Plowr. Ured. p. 184 P. Carlinae Jacky, p. 59, f. 14. Sacc. Syll. xvi. 297. Sydow, Monogr. i. 35. Fischer, Ured. Schweiz, p. 216, f. 167. Spermogones. Epiphyllous and on the petioles, singly or in groups. Uredospores. Sori amphigenous, without evident spots, scattered, not confluent, mi- nute, punctiform, pulverulent, brown; spores globose or broadly ellipsoid, very deli- cately echinulate, pallid- brown, 24—30 X 20— fx; epispore uniformly thick, with three germ-pores. Teleutospores. Sori simi- lar, but blackish-brown; spores ellipsoid to obovate-oblong, rounded at both ends or more often attenuated downwards, not thickened above, hardly constricted, delicately verruculose, brown, 25—35x16—20 yu.; pedicels hyaline, Fig. 89. P. Carlinae. 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 m
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