MILDEWS, RUSTS AND SMUTS 
77 
Syn. Puccinia trijolii, Hedw. 
Puccinia fallens, Cooke. 
Trichobasis fallens, Cooke. 
On leaves and petioles of Trifolium frangiferum, T. 
hybridum, T. medium, T. ochroleucum, T. pratense. Europe, 
Asia Minor, Persia, N. America. 
This species as understood by Plowright, embodied 
Uromyces trifolii-repentis, Liro. For distinctions between 
the two, see note under the last-named species, whose 
host-plant is Trifolium repens. 
Uromyces trifolii-repentis, Liro. 
Pycnidia. Arranged in minute, honey-coloured groups 
on the upper surface of the leaf. 
Aecidia. On the under surface of the leaf in small, cir¬ 
cular groups, in elongated groups on the nerves and petioles, 
shortly cylindrical, yellowish-white, edge slightly recurved, 
torn ; spores angularly globose or elliptical, minutely 
warted, yellow, 17^—21 X 14—18 p. 
Uredospores. Sori on the under surface of the leaf, 
or on the petioles, scattered or clustered, minute, often 
forming larger patches by running into each other, soon 
naked and powdery, pale brown ; spores globose, sub- 
globose or elliptical, pale brown, echinulate, 19—26 X 17—24 
[jl ; germ-pores equatorial, 2—^4, generally 2. 
Teleutospores. Sori on the under surface of the leaf, or 
on the petioles, scattered or clustered, minute, larger when 
encroaching on each other, bounded by the split epidermis, 
powdery, dusky brown ; spores globose, subglobose or 
elliptical, tip rounded, with quite a minute papilla, smooth, 
or sometimes very minutely warted, or with indistinct 
lines, brown, 18—30 X 16—25 [i, pedicel colourless, short, 
deciduous. 
On leaves and petioles of Trifolium repens. Europe genc- 
ralty, Asia Minor, Persia, N. and S. America, Australia. 
Distinguished from Uromyces trifclii. Lev., by the fewer 
germ-pores of the uredospore, and by the presence of aecidia. 
Confounded with the last-named species in this country. 
EUPHORBIACEAE 
Uromyces seutellatus, Lev., Plowr., Ured., p. 134. 
The mycelium permeates the entire host-plant. 
Pycnidia. On the under surface of the leaf, scattered or 
numerous, sometimes absent. 
Uredospores. Not in separate sori, but often mixed 
