OXPHALIA. 391 



more thick, round and curved, or compressed and ascending, 

 undulate, grey. 



Agaricus (Omphalia) oniscus, Fries, Epicr., p. 123 ; Cke., 

 Hdbk., p. 94 ; Cke., Illustr., pi. 209A. 



Among damp mosses, &c. 



Distinguished by the grey colour of every part. Allied to 

 0. pyxidata ; the latter, however, differs in the yellowish- 

 brown colour. 0. rustica differs in the shorter stem, and 0. 

 striaepileus in the longer, slender stem. 



Omphalia caespitosa. Bolton. 



Pileus about in. across, flesh thin, almost hemispherical, 

 iimbilicate, sulcate almost to the centre, margin crenate, 

 smooth, pale ochraceous- white ; gills shortly decurrent, 

 distant, rather broad, whitish ; stem i-f in. long, nearly 1 

 line thick, almost equal, slightly bulbous at the base, coloured 

 like the pileus, hollow. 



Agaricus caespitosus, Bolton, t. 41 ; Cke., Hdbk., p. 94 ; 

 Cke., Illustr., pi. 209u. 



On banks. 



This species has been confounded with 0. oniscus, Fr., 

 both in the " Handbook," ed. i., and by Fries himself. It is 

 exactly the plant figured in the English edition of Bolton, 

 but the German reprint is coloured quite differently. The 

 colour is entirely of a delicate ochraceous-white. (Cooke.) 



Omphalia glaucophylla. Lasch. 



Pileus up to ^ in. across, membranaceous, inf undibuliform , 

 plicately striate, almost glabrous, mouse-colour, hygropha- 

 nous, becoming pale and almost even when dry ; gills de- 

 current, rather distant, lanceolate, olive ; stem stuffed, firm. 



Agaricus (Omphalia) glaucophyllus, Lasch, no. 217; Cke.,. 

 Hdbk., p. 94. 



On the ground in woods. 



A small, and apparently distinct species, but comparatively 

 rare and imperfectly described. 



Omphalia rustica. Fr. 



Pileus 3-6 lines across, membranaceous, slightly convex, 

 umbilicate, glabrous, striate, hygrophanous, nearly even, and 

 slightly silky when dry, greyish-brown; gills decurrent, 

 rather thick, equally narrowed at each end, grey, margin 



