242 B^'itish UredinecE and Ustilaginetr 



Synonyms. 

 Scbrot, loc. cit., p. 362. 



Uredo cBcidioides. D. C, "Flore frang.," vol. ii. p. 236. 

 Ccsoma agirinum. Schlecht., " Flor. Berol.," vol. ii. p. 124. 



On Popiihis alba. 



Biology. — The jecldiospores of this species are Cccoiiia vier- 

 curialis. After performing many cultures with the Melampsorje, I 

 at last placed the germinating teleutospores of this species, obtained 

 from Dinmore Hill, Herefordshire, in October, 1887, on a plant of 

 M. percnnis (Exp. 711) ; the spermogonia appeared in about ten days. 

 A duplicate culture on Clematis vitalba was without effect. 



Melampsora populina. (Jacq.) 



Uredospores — Sori hypogenous, roundish, at first covered by the 

 epidermis, orange. Spores elongate, elliptical, or ovate, echinu- 

 late, orange-yellow, 28-40 x i$-2oix. Paraphyses more or 

 less abundant, capitate or ovate, 45-55 X 20/^. 



Teleutospores — Sori hypophyllous, flat, generally crowded, often 

 confluent, forming reddish brown, then blackish crusts. 

 Spores cylindrico-prismatic, in section polygonal, pale brown, 

 larger above, 40-50 x 10-15//,. 



' Synonyms. 



Lycoperdon populina. Jacq., " Collect," Sup., t. ix. figs. 2, 3. 



Uredo cylindrica, Strauss. Berk., " Eng. Flor.," vol. v. p. 385, 

 in part. 



Lecythea populina, Lev. Cooke, " Micro. Fungi," 4th edit., 

 p. 221. 



Melampsora populina, Lev. Cooke, " Hdbk.," p. 523 ; " Micro, 

 Fungi," 4th edit., p. 219, t. ix. figs. 195, 196. Schrot., loc. cit., 

 p. 362. 



Uredo populina. Grev., " Flor. Edin.," p. 442. Johnst., " Flor. 

 Berw.," vol. ii. p. 200. Purton, "Midi. Flor.," vol. iii. t. 27, 

 No. 1542. 



Exsiccati. 



Cooke, i. 83 ; ii. 61, 135 ; " L. R," 47. Vize, "Fungi Brit.," 

 i35> 231 ; "Micro. Fungi Brit," 326, 443. 



