234 British Uvedinee and Ustilaginee. 
Synonyms, 
Winter, Joe. cit., p. 233. 
Tremella clavariaformis. Jacq., “ Collect.,” vol ii. p. 174. 
Podisoma junipert, Fries. Berk., ‘‘ Eng. Flor.,” vol. v. p. 362. 
Bull, t. 427, fig. x. Cooke, “Hdbk.,” p. 510; “ Micro. Fungi,” 
4th edit., p. 214. Johnst., “Flor. Berw.,” vol. ii. p. 146. Grev., 
“ Flor. Edin.,” p. 427. 
Ecidium laceratum, Sow. Berk., “Eng. Flor.,” vol. v. p. 373. 
Sow., t. 318. Grev., “Flor. Edin.,” p. 447. Johnst., “Flor. 
Berw.,” vol. ii. p. 107. 
eestelia lacerata, Tul. Cooke, “ Hdbk.,” p. 534; “ Micro. 
Fungi,” 4th edit., p. TOP) t. i. figs, 22-26. Grev., t. 209. 
LExsiccati. 
Cooke, i. 2, 125; ii 442, 640; “L. F.,” 50. Berk., 106, 111. 
Vize, “ Micro. Fungi,” 129; “Micro. Fungi Brit.” 38, 69. 
Aicidiospores on Crategus oxyacantha, Pyrus communis, June 
to August. 
Teleutospores on Juniperus communis, April to May. 
BIOLoGY.—The teleutospores germinate within twenty-four hours 
after being placed in water, and the promycelial spores, when applied 
to Crataegus, give rise in ten or twelve days to the eecidiospores. This 
culture is very easy to make. I have done it sixteen times, and had 
no failure. A certain number of failures have followed my cultures 
of the promycelial spores on Pyrus communis, but still I have suc- 
ceeded often enough to prove the metcecism. The pseudoperidia on 
pear are similar to those on thorn, and can be distinguished at a glance 
from R. cancellata, RAthay states that ecidiospores occur also on P. 
torminalis and Crategus monogyna in addition to the above-named 
plants (‘‘ Untersuch. iiber die Spermogonien der Rostpilze,” pp. 20, 
22. Wien: 1882). 
The converse culture of the zecidiospores on juniper I made in 1884. 
On June 25, a small juniper was infected with the ecidiospores ; on 
July 8, many of the leaves began to turn yellow, these during the 
summer and autumn fell off, leaving bare places on the branches, and 
giving the bush a very peculiar appearance ; in December, 1885, these 
bare places began to swell; and on April 1, 1886, the teleutospore-masses 
were produced. Thus it will be seen that the ecidiospores require 
two years in which to perfect the development of perennial teleuto- 
