ON CARYOPHYLLACEZ 219 
P. Sperguliae DC. ; Cooke, Micr. Fung. p. 210. Sydow, Monogr. i. 560. 
P. Moehringiae Fckl. ; Cooke, Micr. Fung. p. 210. 
Teleutospores. Sori hypophyllous or rarely on the stems, 
scattered or circinate, on pale spots, sometimes confluent, 
pulvinate, pallid-brown, then darker, greyish-pulverulent from 
the numerous basidiospores; spores oblong-fusoid or clavate, 
/ 
Fig. 167. P. Lychnidearum. Fig. 168. P. Lychnidearum. 
Teleutospores, on Lychnis Teleutospores, on Arenaria 
diurna. trinervis. 
rounded or somewhat pointed above and more or less thickened 
(up to 10 4), gently constricted, rounded or attenuated below, 
smooth, yellowish-brown, 30—50 x 10—20 4; pedicels hyaline, 
persistent, 60—85 w long. 
On various Caryophyllacee, such as Dianthus barbatus, 
Lychnis diurna, L. vespertina, Arenaria trinervis, Gypsophila 
elegans, Sagina nodosa (?), Spergula arvensis (?), Stellaria Holo- 
stea, S. media, S. uliginosa. May—November. It is most 
common on Lychnis diurna, on which as also on Dianthus the 
sori are remarkably circinate. (Figs. 167, 168.) 
The two species, P. Lychnidearum and P. Arenariae, are united in 
Sydows’ Monographia, on the ground that our present knowledge, derived 
from cultures, is insufficient to separate them, and that any apparent 
morphological distinctions break down completely when 4 long series of 
