156 FUNGUS-FLOE A. 



Agaricus (Naiicoria) semiJiexiis,'B. & Br., Ann. Nat. Hist., n. 

 1246; Cke., Hdbk., p. 175; Cke., Illustr., pi. 509a. 



On wood and on the ground. 



A small, gregarious species, distinguished hj the dark- 

 brown pileus that is white and silky near the margin from 

 the veil, and the rough spores. 



Naucoria rimulincola. Rabh. 



Pileus about ^ in. across, convex, umbilicate, margin 

 plicate, rugulosely-tomentose, pale cinnamon; gills adnexed, 

 rather distant, thick, very broad in proportion, pale cinna- 

 mon ; stem more or less excentric, incurved, pale, solid, about 

 J in. long; spores 10 X 5, cinnamon. 



Agaricus (^Naucoria) rimulincola, Eabenh., exs. Fung. Eur., 

 n. 1511; Flora, 1851, p. 505; Cke., Hdbk., p. 175; Cke., 

 Illustr., pi. 509b. 



On twigs, &c. 



Distinguished by the coarsely-plicate pileus and the broad, 

 distant gills. 



** Gills adnate, pileus convexo-;plane. 



Naucoria abstrusa. Fr. 



Pileus §-1 in. across, convex then flattened, orbicular, even, 

 smooth, viscid, ferruginous-tan; flesh dingy, very thin at 

 the margin; gills adnate, crowded, lolane, cinnamon or 

 dilute ferruginous ; stem 1-1 J in. long, 1-2 lines thick, equal, 

 straight, polished, naked, even, pale ferruginous, darker at 

 the base, hollow; spores elliptical, smooth, 10 X 5 /x. 



Agaricus (Naucoria) ahstrusus, Fries, Epicr., p. 194 ; Cke., 

 Hdbk., p. 175; Cke., Illustr., pi. 456. 



On leaf-soil, sawdust, &c. 



Stem distinctly cartilaginous, tough. N. sideroides some- 

 what resembles the present, but grows on wood. N. meli- 

 noides has the margin of the pileus striate. 



Naucoria innocua. Lasch. 



Pileus about 1 in. across, rather fleshy, convex, obtuse, 



almost glabrous, striate, reddish-brown, becoming pale; gills 



adnate, rather crowded, narrow, yellowish-ochre ; stem about 



1 in. long, and 2 lines thick, paler than the pileus, whitish- 



