Inocybe. Fleshy; surface of cap fibrillose or silky; gills subsinuate. 
Hebeloma. Fleshy; cap glabrous; viscid; gills subsinuate; spores 
somewhat argillaceous. 
Flammula. Fleshy ; gills adnate or decurrent. 
Naucoria. Stem cartilaginous; margin of cap indexed; gills not de¬ 
current. 
Pluteolus. Stem sub-cartilaginous; caps lightly fleshy, viscid, margin 
straight; gills not decurrent. 
Galera. Stem sub-cartilaginous, (often fragile) ; cap membranaceous, 
striate, delicate, margin straight; gills not decurrent. 
Tubaria. Stem cartilaginous ; gills decurrent. 
Crepidotus. Stem excentric or none ; on wood. 
Cortinarius. Fleshy; with a universal spider-web (arachnoid) veil, 
which usually disappears before maturity; gills soon ochraceous or 
brown with spores. 
Paxillus. Gills easily separable from the hymenophorum; fleshy 
margin of pileus markedly and constantly inrolled. 
Group 4. Melanosporcie. Spores black, or approaching black, dark- 
brown, or (in Bolbitius) dark ferruginous. Species (except in 
one genus) soft, fleshy, putrescent. 
A. Spores rather brown or purplish than black (Pratellae). 
Chitonia. With volva. 
Agaricus. With ring ; no volva; gills free. 
Pilosace. No volva; no ring; gills free. 
Stropharia. With ring; no volva; gills adnate. 
Hypholoma. Veil separating (usually) from the stem, and fringing 
for a time the margin of the expanding cap. 
Psilocybe. Veil wanting or nearly so; margin of cap incurved when 
young; gills not decurrent. 
Deconica. Veil and margin as in last; gills (triangular) decurrent. 
Psathyra. Veil as in last; margin of cap always straight; gills not 
decurrent. 
Bolbitius. Gills turning to mucus; cap membranaceous; spores fusco- 
ferruginous. 
B. Spores black, or nearly so. 
Coprinus. Cap membranaceous; gills turning to ink. 
Panaeolus. Cap rather fleshy, not striate, margin extending a little 
beyond the mottled gills; no ring. 
Anellaria. Cap as in last; with ring. 
Psathyrella. Cap membranaceous, striate, not exceeding the smoky 
gills; stem somewhat cartilaginous. 
Gomphidius. Gills mucilaginous, decurrent. 
Anthracophyllum. Tough or horny, like a Marasmius. 
Montagnites. Stem expanded at the top to form a disk to which the 
gills are attached. 
Fam II. POLYPORACEAE. 
Boletus. Fleshy, with central stem; tubules long, easily separable 
from the cap and from each other. 
Strobilomyces. Differs from Boletus in that the stem is covered with 
