The North American Species of Crepidotus

Ex 12. Melanotus flavolivens (B. & C.) Sing., Lloydia 9: 130. 1946.

Agaricus (Crepidotus) flavolivens B. & C., Proc. Amer. Acad. Arts & Sci. 4: 117. 1858.
Agaricus (Crepidotus) musaecola B. & C., Jour. Linn. Soc. (Bot.) 10: 291. 1868.
Crepidotus musaecola (B. & C.) Sacc., Syll. Fung. 5: 883. 1887.
Crepidotus flavolivens (B. & C.) Sacc., Syll. Fung. 5: 887. 1887.
Melanotus musaecola* (B. & C.) Murr., Mycologia 10: 16. 1918.

Pileus 4-15 mm broad, spathulate-cuneate, or suborbicular to helmet-shaped, white or sublutescens, subtly appressed-tomentose or subglabrous.

Lamellae close, narrow, brownish, tinged purplish-violaceous. Stipe eccentric or lateral, inconspicuous, 1.5 mm long, curved.

Spores 6-8 x 4.5-5.5 µ, ellipsoid to subovoid, smooth, truncate with a germ-pore, wall thick, double, purplish-brown in 2% KOH. Pleurocystidia none; cheilocystidia 28-45 x 6-11 µ, subclavate, ventricose, bottle-shaped, often with a neck. Cuticle of repent hyphae, bearing colorless hyphae on the surface. Clamp connections present.

Habit, Habitat, and Distribution: On dead plantain leaves, Cuba and Bonin Islands.

Material Studied: BONIN ISLANDS: Type (K) of A. (Crepidotus) flavolivens; CUBA: Type (K) of A. (Crepidotus) musaecola, collected by Wright, No. 86.

Observations: From the information at hand, we agree with Pilát (1950: 221) that M. flavolivens and M. musaecola are the same.

*Murrill spells it musicola, which Dr. A. H. Moser, Professor of Classics, University of Tennessee, approves.