256 British Uredinee and Ustilaginee. 
Uredo polypodii. Pers. 
Sori orange-yellow, rounded or irregular, scattered, often confluent, 
covered by the epidermis. Spores of two kinds: (a) ovate or 
elliptical, echinulate above, smooth below, orange-yellow, 24-30 
X 12-154; (4) ovate or elliptico-polygonal, orange, with a 
.very thick epispore (5) quite smooth, 40-50 X 25-35p. 
Synonyus. 
Schrot., “ Krypt. Flor. Schl.,” vol. iii. p. 374. 
Credo linearis, var. polypodit, Pers., “Syn.,” p. 217, 
Uredo filicum, Desm. Berk.,‘‘ Eng. Flor.,” vol. v. p. 383. Sow., 
320. Cooke, ‘Hdbk.,” p. 526; “Micro. Fungi,” 4th edit., 
p. 215. 
Exstccatt. 
Berk., 339. Cooke, i. 633; ii. 73. Vize, “ Micro. Fungi,” 
143. 
On Polypodium dryopteris, C “ystopleris Sragilis, Adiantum 
capillus-veneris. 
Uredo scolopendri. Fckl. 
Sori hypophyllous, small, pustulate, pale yellow, on brownish 
irregular spots. Pseudoperidium hemispherical, opening by a 
small aperture above, through which the spores escape. Spores 
subglobose or clavate, echinulate, 30-40 X 15-20u. 
Synonyms. 
Schrot., doc. cit., p. 374. 
Credo scolopendri, Fckl. 
Milesia polypodit, B, White (?). “Scot. Nat.,” vol. iv. p. 162, 
t. il. fig. 5. 
On Blechnum spicant, Scolopendrium vulgare. 
June to October. 
Uredo mulleri. Schrot. 
Spermogonia epiphyllous, on circular yellow spots. Sori amphi- 
genous, roundish, golden-yellow, often circinate. Spores 
globose, echinulate, orange, 1820p in diameter. 
