The North American Species of Crepidotus

119. Crepidotus milleri sp. nov.

Illustration: Fig. 195.

Pileus 10-22 mm latus, sessilis, colore cremeus, villosus, flabelliformis, margine incurvatus. Lamellae confertae, medio-latae, albae deinde obscurae. Sporae 7-9 (10) x 4-5 (5.5) µ, ellipsoideae demum ovoideae, punctatae. Basidia 23-27 x 5-6 µ, tetraspora. Pleurocystidia desunt; cheilocystidia 26-58 x 4-13 µ. Cuticula sine magno discrimine, superficies hyphas erectas sine colore gerens, 3-5 µ latas. Fibulae adsunt. Specimen typicum in Herb. Univ. Mich.; lectum prope Fox Forest, New Hampshire, 0. K. Miller 546.

Pileus 10-22 mm broad, sessile, cream color, villose, hirsute behind, flabelliform, margin incurved.

Lamellae close, medium broad, white then tawny, edges more or less fimbriate.

Spores 7-9 (10) x 4-5 (5.5) µ, ellipsoid to ovoid, inequilateral in profile, punctate, walls at times collapsed or ruptured in 2% KOH. Basidia 23-27 x 5-6 µ, 4-spored. Pleurocystidia none; cheilocystidia 26-58 x 4-13 µ, cylindric, clavate, ventricose, apices rounded, at times capitate, more rarely forked. Gill trama tortuous-subparallel to interwoven, hyphae 4-9 µ broad. Pileus trama loosely interwoven. Cuticle not sharply differentiated, the surface bearing more or less of a turf, the hyphae colorless, 3-5 µ broad. Clamp connections present.

Habit, Habitat, and Distribution: On hardwood, New Hampshire, September.

Material Studied: NEW HAMPSHIRE: Miller (MICH) 546, type, from Fox Forest, leg. O. K. Miller, Sept. 1, 1959.

Observations: This species is distinguished from its nearest relatives by its moderately large spores, cream colored pileus, and rather large cheilocystidia.