The North American Species of Crepidotus

88. Crepidotus pecten (B. & C.) Sacc., Syll. Fung. 5: 885. 1887.

Agaricus (Crepidotus) pecten B. & C., Ann. Mag. Nat. Hist. III: 4: 291. 1859.

Illustration: Fig. 161.

Pileus 4 mm broad, sessile, resupinate to reflexed, flabelliform, ochraceous, tomentose, white-downy around point of attachment, margin crenate-sulcate. Context white.

Lamellae medium broad, moderately close to subdistant, umbrinous at maturity, edges white fimbriate.

Spores 6.8-8 x 5.3-6 µ, more or less ovoid or more rarely ellipsoid in front view, very slightly inequilateral in profile, smooth, no germ-pore, thick (double)-walled, brown in 2% KOH. Basidia 18-22 x 4.5-6 µ. Pleurocystidia none; cheilocystidia 27-63 x 5-8 µ, clavate, often subcapitate, in conspicuous clusters. Gill trama subparallel. Pileus trama interwoven. Cuticle of repent hyphae, with more or less erect, colorless, short hyphae. Clamp connections present on the epicuticular hyphae, and at the base of some of the cheilocystidia.

Habit, Habitat, and Distribution: On dead branches, North Carolina.

Material Studied: NORTH CAROLINA: Curtis 4991, type (K).

Observations: The umbrinous gills suggest an atypical Crepidotus, but the spores and other structural features of the pileus and hymenium indicate a Crepidotus. Pilát (1950) says that it approaches C. lundellii var. subglobisporus.