British Uredinccc and UstilaoinecE. 



c3 



Synonyms. 

 Winter in Rabh., " Krypt. Flor.," vol. i. p. 252. 

 Uredo sempervkn. Alb. and Schw., " Consp.," p. 126. 

 Endophyllum sempervivi, Lev. Berk., Ann. Nat. Hist., No. 476. 

 Cooke. " Hdbk.," p. 546 ; " Micro. Fungi," 4th edit., p. 200. 



On Semperznviwi 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 F.ndophyllum on Sempervivum is 

 identical with that on Sediini aa'c, but I have been unalile to produce 

 the Endophyllum on Seduin acre from the spores of E. sejnpervivi, 

 although the same spores sown on Setnperviviim tectorum always 

 produced the Endophyllum in the following spring. I was further 

 unable to infect S. proliferum and califor7iictan. Mr. W. G. Smith 

 {Card. Chron., 1880, pp. 660 and 725) reports this fungus on 6". monta- 

 num, and Mr. Badger (p. 815) on S. globiferum and calearum. 



GYMNOSPORANGITTM. 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. yEcidio- 

 spores in basipetal chains with alternate barren cells, enclosed in 

 a pseudoperidium. 



Gymnosporangium sabinse. (Dicks.) 



JE.cidiospores — Spots at first orange, then reddish, thickened, 

 generally circular. Pseudoperidia flask-shaped, pale brown, 

 split to the base into laciniae which remain for a long time 



