. The British rust fungi (Uredinales) their biology and classification. Rust fungi. The markings on the teleutospores are perfectly invisible when wet. This species has no connection with Caeoma Saxifragae which is also found on S. granulata. I have specimens from both Scotland and Ireland, the latter on S. umbrosa from Clare Island, and the former on S. stellaris from Lochnagar. Fig. 160. P. Saxifragae. Te- leutospores, u, on S. umbrosa (Ireland), b, on S. stellaris (Lochnagar). Distribution : Central and Western Europe. 84. Puccinia Pazschkei Dietel. P^iccinia Pazschkei Diet, in Hedwig. 1891
. The British rust fungi (Uredinales) their biology and classification. Rust fungi. The markings on the teleutospores are perfectly invisible when wet. This species has no connection with Caeoma Saxifragae which is also found on S. granulata. I have specimens from both Scotland and Ireland, the latter on S. umbrosa from Clare Island, and the former on S. stellaris from Lochnagar. Fig. 160. P. Saxifragae. Te- leutospores, u, on S. umbrosa (Ireland), b, on S. stellaris (Lochnagar). Distribution : Central and Western Europe. 84. Puccinia Pazschkei Dietel. P^iccinia Pazschkei Diet, in Hedwig. 1891, p. 103 ; Ber. deutsch. Bot. Gesell. ix. 44, pi. 3, f. 15. Sacc. Syll. xi. 185. Sydow, Monogr. i. 503, f. 411. , Ured. Schweiz, p. 148, f. 113. Trans. Brit. Myc. Soo. iii. 123. -1 mm. wide,. Fig. 161. P. Pazschkei. Te- leutospores and mesospore, (Sutton Coldfield). Teleutospores. Sori epiphyllous, about \- scattered or more often in orbicular groups 2—3 mm. diam., a few occasion- ally hypophyllous, surrounded by the swollen and torn epidermis, pulverulent, dark reddish-brown; spores ellipsoid or oblong, rounded at both ends, very slightly thickened above or with a minute flat papilla, gently constricted, faintly and irregularly verruculose, pale clear-brown, 25—35 x 13—18yu.; pedicels hyaline, short, deciduous; a few mesospores intermixed. On leaves of Saxifraga longifolia, Kew Gardens (G. Massee), Journ. Bot. xlvi. 152. On a hybrid between 8. Cotyledon and S. aizoon, Sutton Coldfield, April and May, 1911—12. (Fig. 161.) A parasite doubtless introduced into this country with the plants. In the Sutton example, the sori form two or three perfectly round groups. 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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