96 
MILDEWS, RUSTS AND SMUTS 
ARTEMISIA 
Puccinia absinthii, D.C 
Uredospores. Sori minute, scattered or clustered, some¬ 
times on minute yellowish spots, rounded or rarely elon¬ 
gated, powdery, pale brown ; spores subglobose or ellip¬ 
tical, echinulate, yellow or pale yellowish-brown, 20—35 
X 15—26 [ji. 
Teleittospores. Sori on both sides of the leaf, and some¬ 
times on the stem, scattered or clustered, roundish, soon 
naked, blackish ; spores oblong, elliptic-oblong or oblong 
club-shaped, tip rounded and thickened, constricted at the 
septum, upper cell minuteb/ warted, lower cell often 
smooth, brown, 38—^60 X 20—27 p, pedicel stout, persis¬ 
tent, long. 
Syn. Uredo artemisiae, Berk. 
Trichobasis artemisiae, Berk. 
On various species of Artemisia. Britain, Europe gener¬ 
ally, Siberia, N. America, and Japan. 
ASTER 
Puccinia asteris, Duby, Plowr., Ured., p. 215. 
Teleutospores. Sori scattered or concentric on variously 
coloured spots on the under surface of the leaf , compact, 
blackish-brown ; spores club-shaped or oblong club-shaped, 
tip rounded or somewhat pointed, much thickened, slightly 
constricted at the septum, and narrowed below, smooth, 
brown, 35—60 X 14—24 [a, pedicel persistent, thick, long, 
sometimes a few mesospores are present. 
Syn. Puccinia tripolii, Cke. 
On living leaves of Aster tripolium, and on various cul¬ 
tivated Asters. Britain, Europe generally, Siberia, and N, 
America. 
CARDUUS 
Puccinia carduorum, Jacky. 
Uredospores. Sori scattered, minute, cinnamon, powdery ; 
spores globose or subglobose, echinulate, pale brown, 22— 
28 (X diam. 
Teleuto spores. Sori similar to those of the uredospore, 
dark brown ; spores very variable, ovate, elliptical or 
oblong, tip rounded, not thickened, not at all, or scarcely 
constricted at the septum, base generally rounded, minutely 
warted, epispore thin, 25—28 x 17—24 p, pedicel short. 
On living leaves of Carduus crispus, C. nutans and C. 
acanthoides, Britain, Europe generally, and Siberia. 
