The North American Species of Crepidotus
86. Crepidotus antillarum (Pat. apud Duss) Singer Lilloa 13: 62. 1947.
Crepidotus cinchonensis Murr., Mycologia 5: 30. 1913.
Tremellopsis antillarum Pat. apud Duss, Enum. Champ. Guadel., p. 13. 1903.
Illustration: Fig. 160.
Pileus reaching 2 cm broad, convex to plane, reniform to orbicular, dull watery-white, drying cinnamon buff, pulverulent to nearly glabrous, base sometimes strigose, attached by a lateral or eccentric point, or by the vertex and appearing resupinate when growing on the lower side of a log or trunk, dry, margin striate. Context thin, soft.
Lamellae radiating from a lateral or eccentric point, dull watery white, becoming subfulvous, thin, crowded, ventricose, broad in the middle.
Spores 7.5-10.5 x 5-7 µ, mostly 8-9 x 5-5.5 µ, ellipsoid, smooth, dark clay color. Basidia 20-38 x 6-8 (9) µ, 2-4-spored. Pleurocystidia none; cheilocystidia 25-50 x 5-9 µ, somewhat variable: ventricose, clavate, often more or less constricted, and at times subcapitate, many collapsed against the gill edge. Gill trama subparallel, hyphae 4-8 µ broad. Pileus trama interwoven. Cuticle of repent hyphae, with or without erect, scattered, colorless, straight, septate hyphae. Clamp connections present on the epicuticular hyphae and the tomentum at the base of the pileus.
Habit, Habitat, and Distribution: On hardwood, Jamaica and Guadeloupe; also South Florida (Singer 1947).
Material Studied: JAMAICA: Murrill 610, type (NY) of C. cinchonensis, from Cinchona, Dec. 25-Jan. 8, 1908-9; GUADELOUPE: No. 224, type (FH) of C. antillarum.
Observations: Our observations on C. antillarum were limited by the paucity of material of the type. The spores and general features support Singer's contention that it agrees with the type of C. cinchonensis. Singer (1947) interpreted the pileus trama as being subgelatinous.