. The British rust fungi (Uredinales) their biology and classification. Rust fungi -- Great Britain. Fig. 215. P. Arrhenatheri. a, teleutosporea on Arrhenatherum, from Hampton- in-Arden ; b, another, and c, two abnormal ones, from Lichfield ; d, a paraphysis and uredospore from the latter. Teleatospores. Sori hypophyllous, scattered, minute form or shortly linear, covered by the epidermis, black; spores ellipsoid-oblong or oblong- clavate, rounded, truncate or rarely gently attenuated a- bove where they are thickened (5—lOyu.) and darker, hardly or not at all constricted, gen- erally attenuate
. The British rust fungi (Uredinales) their biology and classification. Rust fungi -- Great Britain. Fig. 215. P. Arrhenatheri. a, teleutosporea on Arrhenatherum, from Hampton- in-Arden ; b, another, and c, two abnormal ones, from Lichfield ; d, a paraphysis and uredospore from the latter. Teleatospores. Sori hypophyllous, scattered, minute form or shortly linear, covered by the epidermis, black; spores ellipsoid-oblong or oblong- clavate, rounded, truncate or rarely gently attenuated a- bove where they are thickened (5—lOyu.) and darker, hardly or not at all constricted, gen- erally attenuated downwards, smooth, pale-brown, 30—45 x 18—24/x, mixed with brown- ish paraphyses; pedicels short, brownish. puncti-. Fig. 216. P. Arrhenatheri. spores, paraphysis and ur on Arrhenatherum, Sydow). Silesia Teleuto- edospore,. (ex herb. [/Ecidia on leaves and flowers of Berberis vulgaris;] uredo- and teleutospores on Arrhenatherum elatius. (Figs. 215, 216.) This .species produces on the Berberis its characteristic witches'-brooms, composed of many upright branches ; it was at first mistakenly identified with jE. Magelkaenicum Berk. The secidium has not been seen in 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. Cambridge, University Press
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