MILDEWS, RUSTS AND SMUTS 159 
European species of Puccinia parasitic on British plants, 
hut not recorded as occurring in Britain. 
ARTEMISIA, L. 
Puccinia artemisiella, Syd. 
Teleutospores. Sori small, scattered or clustered, mostly 
on the upper surface of the leaves, black, partly hidden by 
down : spores oblong or elliptic-oblong, tip generally 
rounded and thickened, constricted at the septum, smooth, 
pale chestnut, 35—^49 x 14—21 p, pedicel long, stout, 
tinged brown, persistent. 
On living leaves of wormwood— Artemisia vulgaris. Ger¬ 
many. 
CIRSIUM 
Puccinia cirsii-lanceolati, Schroet. 
Aecidia. Seated on minute yellow spots on the under 
surface of the leaf, for a long time closed, then opening 
by a small pore, whitish ; spores subglobose, warted, orange, 
22—35 X 20—28 p. 
Uredospores. Generally on the upper surface, rusty; 
spores subglobose, echinulate, brown, 24—36 x 20—26 p. 
Teleuto spores. Generally on the upper surface, minute ; 
spores elliptical, tip rounded, not thickened, punctate, 
dusky brown, 30—^40 X 22—25 p, pedicel short. 
On leaves of Cirsium lanceolatum and C. eriophorum. 
Europe generally, and N. America. 
Puccinia le mourieriana, Maire. 
Teleuto spores. Sori on under surface, on round or 
irregular spots; spores club-shaped, tip variable, much 
thickened, constricted, smooth, yellowish-brown, 40—55 
X 14—21 p, pedicel stout, persistent. 
On Cirsium palustris. France, Spain. 
CREPIS 
Puccinia crepidis, Schroet. 
Pycnidia. Scattered amongst the aecidia. 
Aecidia. Often covering the under surface, edge white, 
spores minutely warted, tinged yellow, 15 — 25 X 14—20 p. 
Uredospores. Generally on the under surface ; spores 
subglobose, pale brown, 20—25 x 16—20 p. 
Teleuto spores. Mostly on the under surface, spores 
elliptical, not constricted, minutely punctate, chestnut, 
20—30 X 17^—22 p, pedicel slender. 
On Crepis virens. Europe generally. 
