The North American Species of Crepidotus

Ex 11. Melanotus subcuneiformis (Pat.) Sing., Lilloa 13: 87. 1947.

Crepidotus subcuneiformis Murr., Mycologia 5: 29. 1913.

Pileus reaching 10 mm broad and becoming somewhat longer, sessile, broadly wedge-shaped, approaching orbicular, plane above, tapering to a rather broad base, glabrous or pulverulent, moist, dull-isabelline to avellaneous-isabelline, margin even. Context thin, rather firm, fragile on drying.

Lamellae radiating, plane, subcrowded, dull-yellowish to umbrinous.

Spores 7-9 x 5-6 µ, ellipsoid to sublenticular, smooth, wall double, with a germ-pore. Basidia 24-28 x 6-7 µ, 4-spored. Pleurocystidia none; cheilocystidia 20-27 x 3-5 µ, cylindric-clavate, inconspicuous. Gill trama interwoven. Cuticle of repent hyphae, slightly darker than the context. Clamp connections present on the cuticular hyphae, and on the tomentum at the base of the pileus.

Habit, Habitat, and Distribution: On decaying cocoanut husks, Grenada, September.

Material Studied: GRENADA: Type collected by W. E. Broadway, September 1905 (NY).

Observations: The sublenticular spores with a germ-pore place this in the genus Melanotus (see Singer, 1947).