256 Bj'itish UredinecB and Ustilaginece. 



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 12-15/x; {b) ovate or elliptico-polygonal, orange, with a 

 very thick epispore (5/*) quite smooth, 40-50 x 25-35//. 



Synonyms. 



Schrot., " Krypt. Flor. Schl.," vol. iii. p. 374. 



Uredo linearis, var. polypodii. 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. _ _ 



Exsiccati. 



Berk., 339. Cooke, i. 633 ; ii. 73. Vize, " Micro. Fungi," 



143- 



On Polypodium dryopteris, Cystopteris fragilis, Adiantuni 

 capilliis-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 orclavate, echinulate, 30-40 X 15-20/x. 



Synonyms. 

 Schrot., loc. cif., p. 374. 

 Uredo scolopendri, Fckl. 



Milesia polypodii, B. White (?). "Scot. Nat.," vol. iv. p. 162, 

 t. ii. fig. 5. 



On Blechmwi spicant, Scolopendriicm vulgare. 

 June to October. 



Uredo muUeri, Schrot. 



Spermogonia epiphyllous, on circular yellow spots. Sori amphi- 

 genous, roundish, golden-yellow, often circinate. Spores 

 globose, echinulate, orange, 18-20/x, in diameter. 



