MJLDEWS, RUSTS AND SMUTS 
133 
chestnut colour ; spores subglobose or elliptical, echinulate, 
pale chestnut, 25—30 x 20^—25 [a. 
Teleuiospores. Sori minute, irregularly scattered, pow¬ 
dery, dusky brown, on both surfaces of the leaf ; spores 
oblong club-shaped or spindle-shaped, tip usually with a 
pale, conical wart, scarcely constricted at the septum, 
smooth, chestnut-brown, 35^—50 X 16^—25 p,, pedicel 
persistent, colourless, thick, long. 
Syn. Aecidium caliliae, Grev. 
On Caltha paludris. Britain, Europe, Siberia, N. 
America. 
THALICTRUM 
Puecinia tlialictrij Chev., Plowr., Ured., p. 206. 
Tele^ltospores. Sori circular or elliptical, soon naked, 
powdery, dusky-brown, scattered or in groups, often 
occupying the entire under surface of the leaf ; spores 
strongly constricted at the septum, apical cell globose or 
broadly elliptical, lower cell globose, elliptical, obvoate or 
rarely club-shaped, generally narrower than the upper cell, 
tip not thickened, covered with large sharp-pointed warts, 
brown, 30—55 X 20-—30 p., pedicel colourless, deciduous. 
S}^. Piiccinia tuhercidata, Koern. 
On Thalictrmn jlavum and T. minus. Britain, Europe, 
Siberia, and N. America. 
Plowright suspects that the mycelium is perennial in 
the host-plant. 
CARYOPHYLLAGEAE 
ARENARIA 
Puecinia arenariae. Winter; Plowr., Ured., p. 210. 
Teleutospores. Sori powder}/, pale brown, then dusky 
brown, becoming greyish or hoary from the presence of 
numerous secondary spores, scattered, in rings or forming 
elongated crusts, on the under surface of the leaves and 
stem ; spores oblong spindle-shaped or club-shaped, tip 
rounded or more or less narrowed, thickened, slightly 
constricted at the septum, narrowed below, smooth, yel¬ 
lowish-brown, 35—55 X 15—25 p., pedicel persistent, 
longish. 
Syn. Puecinia lychnidearum, Link. 
Puecinia moehringiae, Fuckel. 
On Agrostemma githago, Dianthus barbatus, Sagina 
apetala, S. procumbens, Stellaria media, S. holosiea, S. 
uliginosa,Cerastiumtriviale, Aren aria serpylli folia. Britain 
Europe, Siberia, India, and N. and S. America. 
