90 
MILDEWS, RUSTS AND SMUTS 
POLYGONACEAE 
Uromyces acetosae, Schroet. 
Pycnidia and aecidia on both sides of leaves, and on stem. 
Uredospores. Sori on both sides, on reddish-purple 
spots ; spores minutely warted, 18—25 X 17—22 p, 3 
germ-pores. 
Teleutospores. Spores globose or elliptical, tip not 
thickened, rarely with a minute pale wart, base rounded, 
with minute warts arranged in lines, 21—26 X 20—24 p. 
On Rumex acetosa and R. acetosella. 
IRIDACEAE 
Uromyces croci, Pass. 
Teleutospores. Sori on both surfaces ; spores subglobose 
or elliptical, tip rounded, not appreciably thickened, very 
minutely warted, brown, 24—32 x 21—28 p, epispore 
thick, pedicel colourless, deciduous. 
On Crocus hiflorus and C, vernus. 
LILIACEAE 
Uromyces ambiguus, Lev. 
Uredospores. Sori on both surfaces, permanently covered 
by the epidermis ; spores globose or elliptical, echinulate, 
very pale, 20—28 x 17—22 p, 6—7 germ-pores. 
Teleutospores. Sori on leaves and stem, covered by the 
epidermis ; spores subglobose, ovate or pear-shaped, tip 
rounded, not thickened, smooth, brown, 20—35 X ^7—24 p, 
pedicel slender, deciduous. 
On Allium schoenoprasum and A. sphaerocephalnm. 
Uromyces ornithogali,Lev. 
Teleutospores. Sori scattered, minute ; spores subglobose 
or elliptical, tip not thickened, but with a rather long pale 
wart, brown, 25^—48 x 20—32 p. 
On Muscari racemosum. 
G RAMIN ACE AE 
Uromyces festucae, Syd. 
Pycnidia and aecidia present. 
Uredospores. Sori on the upper surface on yellow spots ; 
spores globose or elliptical, echinulate, yellow, 20—32 X 
18—24 p, epispore thick, 6—8 germ-pores, paraphyses 
absent. 
Teleutospores. Sori on upper surface, often in circles, 
black ; spores ovate or pear-shaped, rarely oblong, tip 
