The North American Species of Crepidotus

Ex 3. Melanotus eccentricus (Murr.) Sing., Lilloa 13: 87. 1947.

Crepidotus eccentricus Murr., North Amer. Flora 10: 155. 1917.

Pileus 5 mm broad, convex, not umbonate, subcircular, isabelline, glabrous, margin entire, incurved.

Lamellae adnate, yellowish to isabelline, subcrowded, broad, ventricose, edges entire.

Stipe 2 mm or less long, 0.5 mm thick, eccentric, enlarged above and below, surface white fibrillose, base surrounded by a white mycelial mat.

Spores 5.3-6 x 4-5 µ, ellipsoid, smooth, with a germ-pore. Basidia 17-24 x 5-6 µ. Pleurocystidia none; cheilocystidia cylindric, few, 30-35 x 2-4 µ. Gill trama subparallel. Pileus trama interwoven. Cuticle a cutis, not greatly differentiated, with a few, scattered, colorless, more or less erect hyphae. Clamp connections on the epicuticular hyphae.

Habit, Habitat, and Distribution: On dead herbaceous stems, Jamaica, December.

Material Studied: JAMAICA: Murrill 21, the type, east of Hope Gardens, Dec. 12, 1908.

Observations: Because of the spore characters, Singer (1947) has transferred this species to the genus Melanotus. The description of microscopic characters is based on a study of the type.