The North American Species of Crepidotus

52. Crepidotus roseus Singer, Lilloa 13: 87. 1947.

Illustrations: Figs. 110, 111.

Pileus 4-6 mm broad, sessile, dimidiate, convex to applanate, at first white then rosy, finally "congo pink" to "light congo pink," pubescent, subsilky to subglabrous, margin incurved. Context thin; odor none.

Lamellae radiating from an eccentric point, attenuated or rounded at inner extremity, subcrowded to subdistant, narrow (1-1.5 mm broad), "coral pink" to "Japan rose," then "testaceous" to "pecan brown."

Spores 5.8-7 (8) x 5-5.7 µ globose, subglobose, or ovoid to subellipsoid, echinulate, brown. Basidia (15) 22-27 x 6-7 µ, 2-4-spored. Pleurocystidia none, or a few near the gill-edges (60-100 µ above), 27-30 x 8-14 µ, clavate-irregular or fusoid; cheilocystidia 22-44 x 7-11 µ, versiform: cylindric, clavate, obclavate, ventricose, ampullaceous, at times constricted. Gill trama subparallel, hyphae 4-7 µ broad. Pileus trama interwoven. Cuticle of repent hyphae, often with numerous epicuticular hyphae forming a turf, the repent hyphae at times somewhat incrusted. Clamp connections present on the epicuticular hyphae.

Habit, Habitat, and Distribution: On wood, Florida, October.

Material Studied: FLORIDA: Singer, the type (FH), on wood of Ficus sp., in tropical thicket, near Miami, October 30, 1942.

Observations: The description of microscopic characters above is based on a study of the type. The pink colors are distinctive.