124 BritisJi Ui^edineo' and Ustilaginecr. 



Synonytns. 



Uroinyces polygo?ii {?ex?,.). Winter in Rabh., " Krypt. Flor.," 

 vol. i. p. 154. 



Fuccinia polygoni. Pers., " Disp. Meth.," p. 39. 



Vadium avicularice, Kze. Cooke, " Micro. Fungi," 4th edit., 

 p. 199; "Hdbk,"p. 545. 



Uredo polygoiwfum. Grev., "Scot. Crypt. Flor.," t. 80; 

 '•Flor. Edin.," p. 434. Johnst., "Flor. Bervv.," vol. ii. p. 201. 

 Berk., " Eng. Flor.," p. 377. 



Trichohasis polygonorum, B. Cooke, " Micro. Fungi," 4th 

 edit, p. 226. 



Puccinia vaginalium, Link. Cooke, " Hdbk.," p. 519. Berk., 

 "Eng. Flor.," vol. v. p. 363. Cooke, "Micro. Fungi," 4th edit., 

 p. 204. 



Puccinia aviadaricB. Grev., "Flor. Edin.," p. 429. Johnst., 

 "Flor. Berw.," vol. ii. p. 195. 



Uromyces polygoni^ Fckl. Cooke, " Hdbk,," p. 519; "Micro. 

 F'ungi," 4th edit., p. 213. 



Urornyces avicularice, Schrot. Cooke, " Grevillea," vol. vii. 

 p. 136. 



Exsiccati. 



Cooke, i. 123 ; ii. 144, 312. Vize, "Micro. Fungi Brit.," 30; 

 "Micro. Fungi," 170. 



On Polygonum aviculare. 



yEcidiospores, May; uredospores, May to July; teleutospores, 

 July to November. 



BlOLOGV. — The cecidium usually occurs on yellowish spots, which 

 are often surrounded by a reddish margin. On the stems it causes 

 considerable distortion. 



Urornyces trifolii. (Alb. and Schw.) 



y^cidiospores in circular clusters, on pallid spots. Pseudoperidia 

 shortly cylindrical, flattish, on the stems in elongated groups ; 

 edges wliitish, torn. Spores subglobose or irregular, finely 

 verrucose, pale orange, 14-23/x in diameter. 



