Heter optic cinia. 169 



yEcidium comJ>ositariini, Mart., var. tussilaginis, Pers. Cooke, 



" Hdbk.," p. 542; "Micro. Fungi," 4th edit., p. 198. Berk., 



"Eng, Flor.," vol. v. p. 370, in part. Sow., t. 397, fig. i. Grev., 



" Flor. Edin.," p. 447. Johnst., " Flor. Berw.," vol. ii. p. 207, 



in part. 



Exsiccati. 



Cooke, i. 12 ; ii. 89. Viz-e, "Fungi Brit.," 70 ; " L. F.," 58. 



yEcidiospores on Ti/ssi/ago farfa?a, June and Jul)'; October 

 and November, 



Teleutospores on Foa irivialis^prateiisis, 7icmoralis, and annua, 

 but rarely on the latter, July and August, October to December. 



Biology. — Schroter states that between the uredospores are 

 numerous stifif, capitate paraphyses. The teleutospores germinate 

 after a very short period of rest, and produce generally two crops of 

 cecidia in spring and autumn. In 1882, I found the aecidiospores 

 produced the uredospores on Poa annua in ten or twelve days. 



Puccinia caricis. (Schum.). 



yEcidiospores — On roundish yellow spots on the leaves, and elon- 

 gated swellings on the stems, causing much thickening and 

 distortion. Pseudoperidia flat, broad, with torn white edges. 

 Spores subglobose, very finely verrucose, orange-yellow, 15- 

 25/A in diameter. 



Uredospores — Sori small, brown, linear, often confluent in long 

 lines. Spores ovate or elliptical, yellowish brown, echinulate, 



20-30 X 15-25/^- 



Teleutospores — Sori dark brown, linear, often confluent in long 

 lines. Spores elongate, oblong, or clavate, persistent, apex 

 truncate or rounded, much thickened, base attenuated, smooth, 

 brown, 40-70 x 14-20/A. Pedicels short, brownish, persistent. 



Synonyms. \ 



Puccinia caricis, Schum. Winter in Rabh., " Krypt. Flor.," 

 vol. i. p. 222. 



Uredo caricis. Schum.^ " Enum. Plant. Scell.," vol. ii. p. 231. 

 Berk., "Eng. Flor.," vol. v. p. 376. Grev., t. 12; "Flor. Edin.," 

 p. 437, sub U. oblongata. 



Puccinia caricina. Grev., " Flor. Edin.," p. 433. 



