230 British Uvredinee ané Ustilaginee. 
7 
Synonyms. 
Winter in Rabh., “Krypt. Flor.,” vol. i. p. 252. 
Uredo sempervivt. Alb. and Schw., “ Consp.,” p. 126. 
Endophyllum sempervivi, Lév. Berk., Ann. Nat. Hist., No. 476. 
Cooke. “ Hdbk.,” p. 546; ‘“‘ Micro. Fungi,” 4th edit., p. 200. 
On Semperwivum tectorum. 
April and May. 
BIOLOGY.—The cups are produced early in the year; the spores 
germinate at once, and the promycelial spores enter all parts of the 
leaves, including. the hairs, and produce mycelium in them as in 
the preceding species. During the summer the infected leaves and 
shoots maintain their normal appearance, but towards autumn the 
lower leaves fall off from the rosettes. The leaves produced_during 
the summer after infection, and those produced from infected plants 
during the winter and spring, are more elongated in their contour, and, 
towards the base especially, have a paler, yellowish hue. The my- 
celium from the leaves reaches the stems, and all the leaves subse- 
quently produced from the plant are pervaded by the mycelium (De 
Bary, Neue Untersuch., 1865, p. 20). 
It has been assumed that this Endephyllum on Sempervivum is 
identical with that on Sedum acre, but I have been unable to produce 
the Endophyllum on Sedum acre from the spores of £. sempervivt, 
although the same spores sown on Sempervivum tectorum always 
produced the Endophyllum in the following spring. I was further 
unable to infect S. proliferum and californicum. Mr. W. G. Smith 
(Gard. Chron., 1880, pp. 660 and 725) reports this fungus on S. monda- 
num, and Mr. Badger (p. 815) on S. globiferum and calearum, 
GYMNOSPORANGIUM. Hedw. 
Teleutospores bicellular, united by a gelatinous matrix into 
variously shaped spore-masses. Each cell provided with from 
two to four germ-pores, placed laterally near the septum. Aicidio- 
spores in basipetal chains with alternate barren cells, enclosed in 
a pseudoperidium. 
Gymnosporangium sabine. (Dicks.) 
cidiospores—Spots at first orange, then reddish, thickened, 
generally circular. Pseudoperidia flask-shaped, pale brown, 
split to the base into lacinize which remain for a long time 
