52 SECTION CAMAROPHYLLOPSIS 



Lamellae decurrent, white, gradually yellowish in age, distant, 

 rather narrow, thin, somewhat intervenose, edges even. 



Stipe 2-7 cm long, 2-6(8) mm thick, white, equal or tapering 

 downward, at times somewhat striate, dry, glabrous, stuffed, becoming 

 hollow. 



Spores 7-10(11) x 4-5.5(6.5) ^, ellipsoid, smooth, pale yellowish 

 in Melzer's reagent. Basidia 38-50 X 5-7 /x, 4-spored ( Lange finds 2- and 

 4-spored). Pleurocystidia and cheilocystidia none. Gill trama of inter- 

 woven hyphae, 4-8 ll broad, yellowish in Melzer's reagent. Cuticle an 

 ixocutis, a thin gelatinous zone, 20-40 fx broad, hyphae colorless, repent, 

 1.5-3 ix in diameter. Hypodermium not differentiated. Pileus trama 

 homogeneous, hyphae more or less radial but rather intricately inter- 

 woven. Clamp connections on the cuticular and gill trama hyphae. 



Fig. 11. H. niveus 



Habit, Habitat, and Distribution — Gregarious to scattered on 

 humus and soil, in deciduous and coniferous woods, Massachusetts, 

 Maryland, Michigan, Tennessee, Alabama, California, Oregon, Wash- 

 ington, August-January; also Europe. 



Material Studied — Alabama: Burke 2057. California: Smith 

 3693, 8724, 8738, 9427. Maryland: Kelly 1822. Massachusetts: Bige- 

 low 8767. Michigan: Kauffman, New Richmond, Sept. 25, 1911; Smith 

 20947, 21352, 33935, 62134. Oregon: Smith 7821, 7856, 7897, 8223, 

 19989, 28327. Tennessee: Hesler 23511, Hesler & Smith 11329. washing- 

 ton: Smith 4677, 17931. Belgium: Heinemann, near Brussels, Nov. 1, 

 1960. 



