ON SAXIFRAGACE^i 



213 



conical papilla, marked with faint, sometimes curved, longitu- 

 dinal stria?, pale-brown, 26 — 45 x 

 14 — 20 fju\ pedicels hyaline, slender, 

 deciduous, not as long as the spore. 



On leaves and petioles of Saori- 

 fraga granulata, S. stellaris, S. um- 

 brosa. Rare. August. (Fig. 160.) 



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, a, on .S'. umbrosa 

 (Ireland), b, on S. stellaris 

 (Lochnagar). 



Distribution : Central and Western Europe. 



84. Puccinia Pazschkei Dietel. 



Puccinia 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. Fischer, Ured. Schweiz, p. 148, f. 113. Trans. 

 Brit. Myc. Soc. iii. 123. 



Teleutospores. Sori epiphyllous, about \ — 1 mm. wide, 

 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 — 18 fi; 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 S. 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 



Fig. 161. P. Pazschkei. Te- 

 leutospores and mesospore, 

 (Sutton Coldfield). 



