136 British Uvedinee and Ustilaginea. 
Uredo apiculosa, Link. Berk., “Eng. Flor.,” vol. v. p. 382. 
Purton, “Midl. Flor,” vol. iii, p. 297. Grev., ‘‘ Flor. Edin.,” 
Pp. 436. 
Trichobasis rumicum, D.C. Cooke, ‘ Micro. Fungi,” 4th edit., 
p. 225. 
Uromyces apiculosa, Lév. Cooke, “*Hdbk.,” p. 518; ‘‘ Micro. 
Fungi,” 4th edit., p. 212, t. vil. figs. 154-155. 
Uromyces rumicum, Lév. Cooke, “Grevillea,” vol. vil. p. 136. 
Exsiccatt. 
Cooke, i. 318, 322; “L. F.,” p. 26. Vize, “Fungi Brit.,” 
63, 553; ‘‘ Micro. Fungi Brit.,” 225. 
On Rumex conglomeratus, obtusifolius, crispus, hydrolapathum, 
acetosa, May to September. 
BioLocy.—The sori are often accompanied by very little dis- 
coloration of the foliage, but the presence of the mycelium often 
causes those parts of the leaf which are adjacent to the sori to retain 
their original green colour long after the unaffected portions of the 
leaves have become yellow from age. Sometimes, however, on 
R. acetosa there is considerable red discoloration. 
Uromyces sparsus. (Kze. and Schm.) 
Uredospores—Sori on pale spots, often convex, round or elliptical, 
amphigenous or cauline, long covered, at length surrounded 
by the ruptured epidermis. Spores round or oblong, 20-23 
in diameter, to 30m in length. 
Zeleutospores—Round or ovoid, frequently attenuated below, 
brown, smooth, epispore thickened above, sometimes hooded, 
30-40 X 15-244. Pedicels long and persistent. 
Synonyms. 
Uromyces sparsus (Kze. and Schm.). Winter in Rabh., 
“ Krypt. Flor.,” vol. i. p. 148. 
Uredo sparsus, Kze.and Schm, “ Deutsch, Schwamme,” 170. 
Uromyces sparsa, Lév. Cooke, ‘‘ Hdbk.,” p. 519 ; “ Grevillea,” 
vol. vii. p. 137; ‘‘ Micro. Fungi,” 4th edit., p. 214. 
On Spergularia rubra. May to July. 
