Autéuuromyces. 125 
Uredospores—Sori pale brown, rounded, scattered, surrounded by 
the torn epidermis. Spores round or ovate, with three or four 
germ-pores, echinulate, brown, 20-26 X 18-20. 
Teleutospores—Sori small, rounded, almost black, long covered by 
the epidermis. Spores globose, elliptical or subpyriform, with 
wart-like incrassations on their summits, smooth, dark brown, 
22-30 X 15-204. Pedicels long, deciduous. 
Synonyms. 
Uromyces trifolid (Alb. and Schw.). Winter in Rabh., “ Krypt. 
Flor.,” vol. i, p. 159. 
Credo faba, B. trifolit, Alb. and Schw., “Consp.,” p. 127. 
Puccinia fallens. Cooke, “ Hdbk.,” p. 508; “ Micro. Fungi,” 
4th edit., p. 212, in part. 
Trichobasis fallens. Cooke, ‘‘ Micro. Fungi,” 4th edit., p. 226. 
Uromyces apiculatus, Lévy. Cooke, ‘Grevillea,” vol. vii. 
p. 136, 
LExsiccati, 
Cooke, i. 116; “L. F.,” p. 40. Vize, “ Fungi Brit.,” 18. 
) » P 8 
On Trifolium pratense, and repens. 
fEcidiospores, May; uredospores, May; and teleutospores, 
May to November. 
B1oLoGy.—The Uredo and Uromyces frequently attack the 
petioles, where they cause elongated swellings and distortions. 
Schréter has found the zcidiospores only on Trifolium repens, and 
states that this stage is of very short duration. A plant of 7. 
repens, with the Uromyces upon it, was in October brought indoors 
and kept there until the following summer. During all this time it 
produced only teleutospores, no zecidiospores. In the open air the 
foliage would probably have been destroyed by the cold, so that the 
fungus would, therefore, have been unable to have kept itself alive, and 
would of necessity have been compelled to develop zcidiospores in 
spring from the last year’s teleutospores (Schroter, ‘‘ Cohn’s Beitrage,” 
vol. ii p. 78). Dr. Cooke has observed bicellular teleutospores 
(Seem. Jour., vol. iv., 1866) on Vicza sepium ,; they were few in number, 
and mixed with the uredospores. 
