OMPHAUA 423 



elliptical; smooth, punctate, verrucose, or echinulate; continuous. 

 Cystidia present, or absent. Growing on the ground, or on wood; 

 solitary, caespitose, subcaespitose, or fasciculate. 



I. P. at the first spread out, margin incurved. 

 A. Generally comparatively large; gills narrow, very crowded. 



1360. 0. hydrogramma (Bull.) FT. Fr. Icon. t. 71. 



vBa)p, water; ^/pa^^rj, a line. 



Livid, or whitish livid when moist, whitish when dry. P. 5-7 cm., 

 submembranaceous, flaccid, deeply umbilicate, very hygrophanous ; 

 margin spreading, undulate, striate. St. 6-8 cm. x 6 mm., very carti- 

 laginous, smooth, generally compressed, undulated, base rooted and 

 white tomentose. Gills livid-whitish, deeply decurrent, very crowded, 

 narrow, arcuate, very unequal. Flesh white, thick at the disc. Spores 

 white, elliptical, 5 x 3/z. Subcaespitose. Amongst dead leaves, 

 especially beech. Oct. Uncommon, (v.v.) 



1361. 0. detrasa Fr. Fr. Icon. t. 73, fig. 1. Detrusa, thrust down. 

 P. 2-5 cm., dark cinereous, subzonate, somewhat fleshy, convex, 



then umbilicate. St. 2-5-3-5 cm. x 4 mm., concolorous, firm, attenu- 

 ated upwards, smooth, whitish at the base. Gills whitish, decurrent by 

 a tooth, thin, crowded. Flesh whitish, thin at the margin. Spores 

 white, "7-8 x 4 /A" Sacc. Woods. Sept. Oct. Eare. 



1362. 0. umbilicata (SchaefE.) Fr. Schaeff. t. 207. 



Umbilicata, having a navel. 



P. 2-3 cm., livid when moist, the disc becoming somewhat fuscous, 

 whitish or yellowish when dry, hygrophanous, submembranaceous, 

 convexo-plane, deeply umbilicate at first, then infundibuliform, 

 smooth. St. 2-5 cm. x 2-4 mm., white, here and there flexuose, 

 twisted, or incurved, apex silky-striate with white fibrils, base some- 

 what rooting, or cohering with villose down. Gills whitish, at first 

 shortly, then deeply decurrent, crowded, thin, unequal. Spores white, 

 "kidney-shaped, 6-8 x 2-5-4 /z" Sacc. Caespitose. In woods amongst 

 moss. Sept. Uncommon. 



1363. 0. maura Fr. Fr. Icon. t. 73, fig. 2. Maura, Moorish. 

 P. 2-4 cm., fuliginous and striate when moist, livid and silky shining 



when dry, hygrophanous, submembranaceous, convex, deeply umbili- 

 cate, smooth. St. 2-5-5 cm. x 2 mm., fuliginous-blackish, very car- 

 tilaginous, somewhat horny, rigid, smooth. Gills shining white, very 

 acutely and deeply decurrent, arcuate, attenuated at both ends, very 

 crowded. Flesh fuliginous, thin at the margin. Spores white, sub- 

 globose, 5-6 x 5 //,, punctate. Smell none, or of new meal. Pastures, 

 heaths, and lawns. Sept. Nov. Not uncommon, (v.v.) 



