The North American Species of Crepidotus

78. Crepidotus fusisporus var. anomalus var. nov.

Illustrations: Figs. 21, 151.

Pileus 5-15 mm latus, flabelliformis vel ungulatus, fibrillosus, obscuro-albus demum pallido-coriaceus. Lamellae confertae, medio-latae, albae deinde "pinkish cinnamon," denique "clay color." Sporae (6) 8-10 x 4-5 µ fusoideae, punctatae. Basidia 24-28 x 5-7 µ tetrasporae. Pleurocystidia desunt; cheilocystidia 25-34 x 7-11 µ, furcata, nodosa vel capitata. Cuticula sine magno discrimine, superficies hyphas erectas sine colore gerens, 2-5 µ latas. Fibulae adsunt. Specimen typicum in Herb. Univ. Mich.; lectum in Tahquamenon Falls State Park, Mich., Aug. 7, 1963, Alma Homola, Smith 67042.

Pileus 5-15 mm broad, flabelliform or ungulate, surface dry and thinly matted-fibrillose, dull white to very pale dingy buff, base only slightly strigose. Context very thin and pliant, whitish, taste mild.

Lamellae moderately close, medium broad, attached to a pseudostipe, white, becoming pinkish cinnamon, finally pale clay, edges even.

Spores (6) 8-10 x 4-5 µ, fusoid, obscurely punctate, yellowish in 2% KOH, often clustered in 2's, 3's, or 4's. Basidia 24-28 x 5-7 µ, 4-spored. Pleurocystidia none; cheilocystidia 25-34 x 7-11 µ, clavate, ventricose, apices often forked, knobbed, or capitate. Gill trama interwoven, hyphae 3-7 µ broad. Pileus trama interwoven. Cuticle not sharply differentiated, the surface bearing a turf of colorless hyphae, 2-5 µ, broad. Clamp connections present.

Habit, Habitat, and Distribution: On hardwood sticks, Michigan and Quebec, July-August.

Material Studied: MICHIGAN: Smith 67042 (type, from Tahquamenon Falls State Park, collected by Alma Homola, Aug. 7, 1963), 67053; CANADA (Quebec): Bigelow 5575 (MASS).

Observations: In this variety, the epicuticular hyphae are not coiled or crooked, and the cheilocystidia are knobbed or forked.