Amanitopsis. With volva ; without ring; gills usually free. 
Lepiota. Without volva; with ring; gills free. 
Schulzeria. Without either volva or ring ; gills free. 
Armillaria. With ring; gills attached to stem. 
Tricholoma. Ringless; fleshy; gills sinuate. 
Clitocybe. Ringless; fleshy; gills decurrent. 
Collybia. Cartilaginous stem; somewhat fleshy, margin of cap at first 
inrolled; gills not decurrent. 
Mycena. Campanulate, rather delicate; margin at first straight; gills 
not decurrent. 
Hiatula. Striate-plicate, diaphanous. 
Omphalia. Umbilicate, fleshy membranaceous; gills decurrent. 
Pleurotus. Stem excentric or wanting; growing on wood. 
Hygrophorus. Gills waxy, variously attached, not easily divisible into 
two plates as in previous genera. 
Lactarius. Juice milky; substance breaking into granules, spores 
rough with points. 
Russula. Similar to the last, but with juiceless crumbling flesh and 
brittle gills. 
Cantharellus. Gills thick and vein-like, or with edge obtuse, decurrent, 
branching, rather waxy. 
Nyctalis. Gills rather thick, edge obtuse; on decaying fungi. 
B. Fleshy-tough, or even corky, non-putrescent, reviving with 
moisture. 
Marasmius. Gills not branched ; cap firm, often thin and membrana¬ 
ceous, tough ; stem slender, elastic. 
Heliomyces. Similar to last, but gelatinous, though tough. 
Lentinus. Gills with serrate edge; (cf. Pleurotus and Panus). 
Panus. Gills entire, becoming tough, firmer than in the last; on wood. 
Xerotus. Gills branched, edge obtuse. 
Trogia. Gills like folds, channeled or crisp ; stem wanting. 
Lenzites. Corky; gills radiating, anastomosed, smooth; sessile, on 
trees, passing into polyporous forms. 
Schizophyllum. Leathery ; gills villous, with a split, doubly revolute 
edge; sessile. 
Group 2. Rhodosporae. Spores rosy or rusty pink. No leathery 
species, all fleshy, putrescent. 
Volvaria. With volva; no ring; gills free. 
Annularia. With ring; no volva; gills free. 
Pluteus. No volva; no ring; gills free. 
Entoloma. Fleshy; margin of cap inrolled at first; gills sinuate. 
Clitopilus. Fleshy; margin of cap inrolled at first; gills decurrent. 
Leptonia. Stem cartilaginous; margin inflexed at first; gills slightly 
attached. 
Nolanea. Stem cartilaginous; margin of cap always straight; gills 
slightly attached. 
Eccilia. Stem cartilaginous; umbilicate; gills decurrent. 
Claudopus. Stem excentric or none ; on wood. 
Group 3. Ochrosporae . Spores ochraceous or subferruginous. 
Species all fleshy, putrescent. [See Bolbitius in next group]. 
Pholiota. With ring; no volva; veil not arachnoid. 
Acetabularia. With volva. 
