Subsection 2. Plants tough, either fleshy or gelatinous, membranaceous, corlcy 

 or woody, persistent, reviving when moistened. 



A) Leathery, either fleshy, membranaceous, or gelatinous, 

 a) Stipe separate from the hymenophore. 



MARASMIUS. Pileus tough and fleshy or membranaceous and leathery. 



HELIOMYCES. Pileus gelatinous and leathery, 

 aa) Stipe continuous with the hymenophore. 

 b) Edge of the gills acute. 



LENTINUS. Edge usually serrate. 



PANUS. Edge entire. 



bb) Edge of the gills obtuse. 



XEROTUS. Gills dichotomous. 



TROGIA. Plants sessile, gills fold-like, irregular, edge grooved or crisped except 

 in our common species where they are entire. 



AA) Plants corky or woody. 



LENZITES. Gills distinct, radiating, sometimes anastomosing behind and resem- 

 bling Daedalea in the Polyporaceae. (Daedalea confragosa has forms 

 which are taken for Lenzites.) 



Tilotus. Gills distinct tomentose, pileus also tomentose. 



Hymenogramme Gills very thin, close, narrow, forked, parallel, flexous. 



Series 2. Schizophyllae. Edge of the gills spHt, fissured, or appendiculate (Con- 

 fer Trogia). 

 a) Plants leathery. 



SCHIZOPHYLLUM. Gills split and revolute ; stipe lateral, pileus sessile. 



aa) Plants .very thin, membranaceous. 

 Rhacophyllus. Pileus striate or even, spHt at the margin; gills replaced by num- 

 berless, oblong, irregular, waved, obtuse lobes, 

 aaa) Plants fleshy. 

 Pterophyllus. Gills bearing smaller spathulate appendages on both sides, stipe 



lateral. 

 Oudemansiella. Margin of gills fissured, lips in the beginning connate with the 

 adjacent ones ; stipe central. 



SECTION 2. RHODOSPORAE, HYPORRHODIAE, Fr. Spores pink, flesh color, 



or salmon color. Plants soft, rarely tough. 

 A) Stipe central. 



z,) Hymenophore separate from the stipe ; gills free. 

 VOLVARIA. Stipe with a distinct volva, annulus wanting. 

 PLUTEUS. Volva and annuhis wanting ; margin of pileus straight. 

 Annularia. Annulus present, volva wanting. 



aa) Hymenophore separate from the stipe ; gills attached. 

 Metraria. Volva and annulus present ; pileus fleshy ; gills adnate (IX, 82). 



Schinzinia. Characters similar to those of Pluteus, but plant tough, surface of 

 pileus with short, irregularly branched hyphae (XI, 44), 



