ON CARYOPHYLLACE.E 



219 



P. Sperguhie DC. ; Cooke, Micr. Fung, p. 210. Sydow, Monogr. i. 560. 

 P. A/oehrinaiae 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. 

 Teleutospores, on Lychnis 

 diurna. 



Fig. 168. P. Lychnidearum. 

 Teleutospores, on Arenaria 

 trinervis. 



rounded or somewhat pointed above and more or less thickened 

 (up to 10 /a), gently constricted, rounded or attenuated below, 

 smooth, yellowish-brown, 30 — 50 x 10 — 20 /a; pedicels hyaline, 

 persistent, 60 — 85 /x long. 



On various Caryophyllacere, such as Dianihus barbatus, 

 Lychnis diurna, L. vespertina, Arenaria trinervis, Gypsophila 

 elegans, Sagina nodosa (?), Spergula arvensis (?), Stellaria Holo- 

 stea, S. media, 8. 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 a long series of 



