230 Lritish Uvedinee and Ustilaginee. 
spherical, elliptical, ovate, generally 20-22 Xx 16-20p, finely 
echinulate. Paraphyses abundant, swollen above, curved. 
Teleutospores—Sori black, pulvinate. Spores cylindrical, cells 
four to six, 50-70 X 20-22, constricted, apex rounded or 
slightly pointed, sometimes surmounted with a brown blunt 
point. Pedicels 100-150p long, colourless, rather firm. 
Synonyms. 
Schrot., oc. cét., p. 352. 
Puccinia potentille. Pers., “Syn.,” p. 229. 
Credo obtusa, Strauss. 
Credo potentillarum, D. C. 
Phragmidium potentille, Winter. 
Phragmidium obtusatum, Fries. Cooke, “ Micro, Fungi,” 4th 
edit., p. 201, in part. 
Phragmidium potentille. Schrot., loc. cit., p. 352. 
On Potentilla argentea and various cultivated species. 
May to November. 
Phragmidium tormentille. Fckl. 
Atcidiospores —Resembling those of P2. fragariastri. 
Uredospores—Sori round, small, orange-red, punctiform. Spores 
spherical or ovate, finely echinulate, reddish orange, 20-23 xX 
17—20p. 
Teleutospores—Sori small, round, punctiform, pale brown. Spores 
cylindrical, cells three to ten, generally five to eight, often 
curved, clear brown, smooth, apex rounded or pointed, 
100-160 X 16-224. Pedicels long (toop), equally thick, 
colourless. 
Synonyms. 
Schrot., oc. cit., p- 352. 
Phragmidium tormentilla. ¥ckl., “Symb. Myc.,” p. 46. 
Uredo potentillarum, D.C. Berk., “Eng. Flor.,” vol. v. p. 382. 
Sow., t. 398, fig. 2. 
Puccinia potentilla. Grev., t. 37, 1m part. 
Avegma obtusatum, Fries. Berk., “ Eng. Flor.,” vol. v. p. 359+ 
Phragmidium obtusatum, Fries. Cooke, “ Hdbk.,” p. 491; 
“Micro. Fungi.,” 4th edit., p. 201, t, ili. fig. 35. 
