Crepidotus betulae Murrill 1917

Crepidotus betulae Murrill, sp. nov
Pileus fleshy, rather thick, suborbicular or renif orm, dimidiate, about 2 cm. broad ; surface dry, villose with felted hairs, glabrous toward the margin with age, pure-white, margin entire, concolorous; lamellae rounded behind, crowded, broad, plane, purewhite, at length colored by the spores, which are ellipsoid, dark-ochraceous, 7-8 X 4-6 /*.
Type collected on fallen twigs of Betula lenta in the New York Botanical Garden, June, 1902, F. S. Earle 241 (herb. N. Y. Bot. Gard.).
Habitat: On dead wood of birch and occasionally beech and certain other deciduous trees. Distribution : New York and the mountains of southwestern Virginia.