The North American Species of Crepidotus

73. Crepidotus paxilloides Sing., Lilloa 22: 594. 1951.

Paxillus reniformis Berk. & Rav. apud Berk. & Curt., Ann. & Mag. Nat. Hist. II: 12: 424. 1853.
Crepidotus reniformis (B. & Rav. apud B. & C.) Singer, Farlowia 2: 544. 1946.
(Non C. reniformis Velenovsky, Ceske houby, p. 556. 1921.)

Illustration: Fig. 146.

Pileus 2.5-7.5 cm broad, pale brown, reniform, densely tomentose to fibrillose-scaly, subimbricated.

Lamellae whitish, at length subferruginous by the spores, very broad, thin, close.

Spores 7.5-9 (10) x 5-6 µ, ellipsoid or ovoid in face view, slightly inequilateral and subreniform in profile, distinctly punctate, pale brown in 2% KOH. Pleurocystidia none; cheilocystidia 32-36 x 5-6 µ, ventricose to slender bottle-shaped. Pileus trama interwoven. Cuticle of repent hyphae, bearing more or less erect, brownish hyphae, singly or in clusters, and more or less clavate pileocystidia , 40-80 x 6-10 µ. Clamp connections present.

Habit, Habitat, and Distribution: On oak rail, North Carolina.

Material Studied: NORTH CAROLINA: Berkeley 1538, type (K), from Sulphur Spring, collected by H. W. Ravenel.

Observations: The description of microscopic characters is based on a study of the type. The subreniform spores are distinctive. Except for its brown fibrils on the pileus, it is close to C. phaseoliformis.