i86 Natural History Bulletin. 



Height 2-3'. Pileus 3^-4'. Spores elliptic, .008 -.01 2 x 

 ,oo5-.oo6 mm. 



Very common in woodlands on the ground in late summer 

 and fall. Ours have the stipe nearly solid, or stuffed below 

 only. The disk is somewhat depressed in older specimens^ 

 The gills are decurrent, as in Cooke's figure, plate 434; in all 

 other particulars our specimens correspond to the figures on 

 plate 433, Cooke's 111. Br. Fungi. 



Subgenus Naucoria. 

 Pileus as in Flammula. Veil none. Stipe cartilaginous. 

 Lamellee free or adnate, but not decurrent. 



30. Agaricus semiorbicularis, Bull. 



Pileus rusty yellow, somewhat fleshy, hemispheric, smooth, 

 somewhat viscid; lamellee adnate, broad, close, at length fer- 

 ruginous; stipe graceful, slender, pale yellowish, shining, 

 stuffed with a distinct pith. Annulus none. 



Height 2 '-3'. Pileus i/^'-i'. Spores elHptic, .0075 x 

 .012 mm. 



Rather common in autumn in pasture fields, woodlands, and 

 by the waysides everywhere. 



Subgenus Gahra. 

 Pileus more or less membranaceous, conic, oval, then ex- 

 panded, margin at first straight and appressed to the stem. 

 Veil none. Stipe cartilaginous. Lamellae not decurrent. 



31. Agaricus tener, Schceff. 



Pileus pale brown, hygrophanous, paler when dry, conic- 

 campanulate, obtuse; lamella; adnate, close, hnear, cinnamon; 

 stipe straight, fragile, shining, concolorous, ex-annulate. 



Height 2'-5'. Pileus i^'-i'. Spores elUptic, .007 x -014 

 mm. 



Very common in summer on lawns and grassy places, 

 coming up thickly after a warm rain; a most delicate and 

 beautiful little species. Usually striatulate when wet, and 

 having the stipe frequently pubescent at the base. 



