. The British rust fungi (Uredinales) their biology and classification. Rust fungi -- Great Britain. ON GRAMINE.*: 275 elliptical or linear, reddish-brown, pulverulent, without para- physes; spores subglobose or ovate, echinulate, brownish, 25— 35 x 20—25^. Teleutospores. Sori similar, but larger (2—4 mm.), compact, pulvinate, black: spores oblong, rounded at both ends, with a cap- like thickening (5—10 //,) above, plainly constricted, brown, 50— 60 x 20—23 fx; pedicels brownish, thick, persistent, 75—100 p long. ^Ecidia on Rumex Acetosa, May and June; uredo- and teleu- tospores on Phragmites
. The British rust fungi (Uredinales) their biology and classification. Rust fungi -- Great Britain. ON GRAMINE.*: 275 elliptical or linear, reddish-brown, pulverulent, without para- physes; spores subglobose or ovate, echinulate, brownish, 25— 35 x 20—25^. Teleutospores. Sori similar, but larger (2—4 mm.), compact, pulvinate, black: spores oblong, rounded at both ends, with a cap- like thickening (5—10 //,) above, plainly constricted, brown, 50— 60 x 20—23 fx; pedicels brownish, thick, persistent, 75—100 p long. ^Ecidia on Rumex Acetosa, May and June; uredo- and teleu- tospores on Phragmites communis, from July. Rare. (Fig. 209.) The results of Plowright's cultures have been confirmed by Klebahn, but at any rate this species is very closely allied to the previous one, and should rather be considered as merely a biological race of it. Distribution : Holland, Germany. 129. Puccinia Agrostidis Plowr. JEcidium Aquilegiae Pers. ; Plowr. Ured. p. 263. jE. Ranunculacearum var. Aquilegiae DC. ; Cooke, Handb. p. 539. P. Agrostidis Plowr. Card. Chronicle, 1890, ii. 139 ; Grevillea, xxi. 110. Sacc. Syll. xi. 202. Sydow, Monogr. i. 717. McAlpine, Busts of Australia, p. 114, f. 27(0- Fischer, Ured. Schweiz, p. 353, f. 257. Spermogones. Honey-coloured, on round spots. sEcidiospores. iEcidia on rather large roundish yellow spots which are often thickened and margined with brown, crowded, hypophyllous, shortly cylindrical, with a torn white margin; spores faintly verruculose, orange, 16—30 x 14—20/x. Uredospores. Sori amphigenous, on yellow spots, elongated or linear, about 1 mm. long, bright-orange; spores globose to IS—2. Fig. 209. P. Trailii. Teleuto- spores, and sori on leaf of Phrag- 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, W. B. (William Bywater), 1848-1938. Cambr
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