PJiragmidiiiiii . 223 



£xstccaJi. 

 Berk , 105. Cooke, i. 22, 67 ; ii. 100. Vize, "Fungi Brit.," 5. 



On Potentilla tormentilla. 



Biology. — I have followed Schroter in the arrangement of these 

 species, but am by no means sure this is distinct from the preceding. 

 Dietel states (" Beitrage zur Morph. Biol, der Uredineen," 1887, p. 9) 

 that the teleutospores of P. obtusatum germinate in the autumn, and 

 they resemble Puccinia teleutospores in having an apical germ- pore 

 in the upper cell, and only one lateral germ-pore in each of the other 

 cells. 



Phragmidium violaceum. (Schultz.) 



^cidiosporcs — Sori hypophyllous, roundish or elongate, often in 

 circular clusters on irregularly rounded spots, above which the 

 corresponding upper surface of the leaf is reddish, and sur- 

 rounded by a broad, irregular, violet-red margin. Paraphyses 

 very {q\n. Spores in short chains, globose or elliptical, echinu- 

 late, orange-yellow, 11-30 x 17-24/^. 



Uredospores — Sori greenish yellow, roundish, pulverulent. Spores 

 globose, ovate or elliptical, echinulate, verrucose, yellow, 19-25 

 X 15-20/A. 



Teleutospores — Sori thick, black, rather persistent. Spores cylin- 

 drical, blunt or rounded at both ends, opaque, cells three 

 to five, mostly four, verrucose with colourless hemispherical 

 flat warts, apex generally provided with a w^art-like brown 

 point, 70-So X 25-30f(,. Pedicels long, slightly clavate below. 



Synonyms. 



Schrot., loc. cit, p. 353. Winter, he. eit, p. 231. 

 Puccinia violacea. Schultz, " Prodr. Flor. Starg.," p. 459. 

 Lecythea ruborwn,'L€w. Cooke, "Micro. Fungi," 4th edit, 

 p. 221, in part. 



Exsiccati. 

 Vize, " Micro. Fungi Brit.," 442. 



On Rubus fructicosus. 



