ON LEGUMINOSA 91 
6. Uromyces Trifolii-repentis Liro. 
U. Trifolii-repentis Livro, Act. Soc. Faun. Flor. Fenn. xxix. 15. Sydow, 
Monogr. ii. 131. Fischer, Ured. Schweiz, p. 23, f. 19. 
U. Trifolii Plowr. Ured. p. 124 p.p. Sace. Syll. vii. 534 p.p. 
McAlpine, Rusts of Australia, p. 97, f. 142, & pl. G, f. 32. 
Trichobasis fallens Cooke, Micr. Fung. p. 226 p.p. 
Puccinia fallens Cooke, Handb. p. 508 p.p. 
Wigredo Trifoliz Arthur, N. Amer. FI. vii. 255. 
Spermogones. Epiphyllous, honey-coloured, forming minute 
clusters. 
Aicidiospores. Aicidia hypophyllous, in clusters, roundish 
on the leaves and as much as 5 mm. long on the nerves and 
petioles, shortly cylindrical, whitish-yellow; margin white, torn, 
hardly revolute; spores minutely verruculose, yellowish, 17— 
21 x 14—18 p. 
Uredospores. Sori hypophyllous and on the petioles, 
scattered over the leaves or gregarious, small or rarely confluent 
and larger, soon naked, pulverulent, pale-brown ; spores globose, 
ovate or ellipsoid, echinulate, yellow-brown, 19—26 x 17—24 » ; 
epispore about 14 thick, with two to four (generally two) 
equatorial germ-pores. 
Teleutospores. Sori surrounded by the cleft epidermis, 
similar, but elongated on the 
petioles, and darker brown; 
spores globose to ovate, rounded 
at the apex, with a very small 
hyaline papilla, smooth or at 
times bearing a few minute 
warts arranged more or less in Fig. 43. U. Trifolii-repentis. a, 
lines, brown, 18—30 x 16—25y;, —ecidia on young leaf; b, uredo- 
j : : and teleuto-sori, on later-formed 
epispore about 2u thick; pedi- — jear, 
cels short, thin, hyaline, decidu- 
ous. 
On. leaves and petioles of Trifolium repens. Aicidia (rare) 
from April and uredospores from May onwards. (Fig. 43.) 
This species is distinguished from U, Trifolix Lév. by the smaller 
number of germ-pores of the uredo, and also by the presence of the ecidia, 
which cause long crooked swellings on the petioles and nerves, but not on 
