CREPIDOTUS. On wood; stipe when present continuous witti tlie hymenopliore. 



aa) Universal veil arachnoid, distinct from the cuticle of pileus. 

 CORTINARIUS. Stipe fleshy, continuous with the hymenophore, gills soon cov- 

 ered with the yellowish-brown spOre-dust. 

 AA) Gills easily separating from the hymenophore. 

 PAXILLUS. Stipe when present continuous with the hymenophore ; margin of 



the pileus constantly involute. 

 SECTION 4. MELANOSPORAE Gill, and Britz. (PRATELLAE and COPRINARIAE 

 in broadest sense). Spores dark brown, purplish brown or black (all spe- 

 cies except Anthracophyllum are soft, not tough.) 

 A) Gills attached to the underside of the pileus in the usual way. 

 a) Pileus fleshy or membranaceous, 

 b) Spores dark brown or purplish brown (Pratellae). 

 c) Hymenophore separate from the stipe ; gills usually free. 

 AGARICUS. (Psalliota Fr.), Volva wanting, annulus present. 

 CHITONIA. Stipe with a volva at the base. 

 PILOSACE. Volva and annulus wanting. 



cc) Hymenophore continuous with the stipe ; gills attached, 

 d) Veil present. 

 STROPHARIA. Annulus present ; gills adnate. 

 HYPHOLOMA. Annulus wanting, veil remaining attached to margin of pileus. 



dd) Veil wanting or obsolete. 

 DECONICA, Stipe tenaceous; margin of pileus at frrst incurved ; gills subtri-, 

 angularly decurrent. 



PSILOCYBE. Stipe tenaceous ; margin of pileus at first incurved ; gills not 

 decurrent. 



PSATHYRA. Stipe fragile ; margin of pileus straight ; gills not decurrent. 

 bb) Spores black. 



e) Gills more or less diliquescing, or pileus thin, plicate and splitting 

 down between the gills (Coprinariae). 

 COPRINUS. Pileus fleshy or membranaceous ; gills at first cohering, soon dis- 

 solving into an inky fluid (or in some smaller species gills splitting where 

 attached to the pileus, so that the membranaceous pileus appears plicate), 

 ee) Gills not diliquescing, etc. 

 f) Spores globose, ovoid. 

 PAN AEOLUS. Pileus somewhat fleshy, not striate, projecting beyond the gills at 

 the margin ; annulus wanting though veil often present ; gills variegated in 

 color from the groups of dark spores on the surface. 

 ANNELARIA. Annulus presesnt ; otherwise as in Panaeolus. 



PSATHYRELLA. Pileus somewhat fleshy ; margin striate ; gills not variegated, 

 ff) Spores elongate, fusiform. 



GOMPHIDIUS. Gills rather mucilaginous, decurrent, 



AA) Gills not attached to a hymenophore (i. e., pileus absent). 



MONTAGNITES. Stipe dilated at the apex into a disk; gills radiating from the 

 edge of the disk free. 



