270 British Uredinee and Ustilaginee. 
BioLocy.—Although Winter and Schréter consider this species 
to be the Accidium of Puccinda fusca, yet, in the absence of direct 
biological evidence, I venture to. differ from them. The Puccinia in 
question is very common, but the Acidium is rare in Britain. 
Acidium bunii. D C. 
cidiospores—Pseudoperidia generally on swellings on the stems, 
shortly cylindrical, with whitish, torn, everted edges. Spores 
polygonal, finely verrucose, orange-yellow, 15-20 in diameter, 
sometimes 25, long. 
Synonym. 
Atcidium bunit, D.C. “Syn,” p. 51. Berk., ‘‘ Eng. Flor.,” 
vol. v. p. 370. Cooke, “Hdbk.,” p. 540; “Micro. Fungi,” 4th 
edit., p. 196. Grev., “Flor. Edin.,” p. 44s. 
On Conopodium denudatum (Bunium flexuosum). 
BIOLOGY.—This A£cidium. is comparatively rare in Britain, and 
I have never been able to obtain any evidence that it is connected 
with the Puccinia:which occurs on the. same host-plant. 
Ascidium euphorbiz. Gmelin. 
Pseudoperidia equally scattered over the whole leaf-surface, at 
first conical, then cup-shaped, with whitish torn edges. 
Spores polygonal or subglobose, finely verrucose, orange- 
yellow, 19-26 X 30~35p. 
Synonym. 
Winter, doc. cit., p. 261. 
icidium euphorbie. Gmelin, “ Linné Syst. Nat.” vol. ii 
Pp. 1473, in part. Purton, “ Midl. Flor.,” vol. iii, No. 1537 (?). 
On Euphorbia exigua, 
Hampshire ; Mr. Hill. 
AXcidium elatinum. Alb. and Schw. 
Mycelium perennial in the affected branches, causing fusiform 
swellings, from which are given off deformed shoots (Hexen- 
besen), which bear pale green, short, swollen leaves on all 
