The North American Species of Crepidotus

124. Crepidotus croceitinctus Pk., New York State Mus. Nat. Hist. Rept. 39: 72. 1886.

Illustrations: Figs. 33, 201, 202, 203.

Pileus 1-4 cm broad, sessile, flabelliform, reniform to dimidiate, or suborbicular, pale yellow to "orange buff" to "warm buff" when young, becoming yellow ocher to tawny on the margin, hygrophanous, glabrous or appressed-fibrillose, but the base white-fibrillose, the margin with disappearing yellowish or grayish fibrils, margin even or only faintly striate. Context firm, watery yellowish or cinnamon-buff; odor and taste mild.

Lamellae pale yellow or "warm buff," becoming ochraceous tawny or orange-cinnamon, close or crowded, medium broad to broad, edges often uneven.

Spores in deposit: "Dresden brown"; spores (4.5) 5-6.5 (7) x 3.9-5.3 µ, ovoid to ellipsoid-ovoid, distinctly punctate, often echinulate-punctate, with a slight suprahilar depression. Basidia 20-30 x 5-6 (7) µ 4-spored. Pleurocystidia none; cheilocystidia 22-58 x (3) 6-9 (16) µ, clavate, ventricose, often more or less capitate, at times irregularly shaped (forked, knobbed). Gill trama subparallel, especially in the middle, the sides more or less interwoven, hyphae 4-10 µ broad. Pileus trama interwoven. Cuticle of repent hyphae, bearing scattered to dense more or less erect hyphae, 3-6 µ broad, or at times pileocystidia which are cylindric, slender-clavate, capitate, forked or knobbed. Clamp connections present.

Habit, Habitat, and Distribution: On hardwood, New York, Michigan, and Tennessee, June-September.

Material Studied: MICHIGAN: Beach 1, 3 (MICH); Smith 1096, 32394, 33436, 39524, 50647, 61335, 61399, 61423, 61451, 63569, 63631, 66667, 66682; NEW YORK: Peck, type, from Adirondack Mts., Saratoga County, July; TENNESSEE: Hesler 9407, 14171.

Observations: The yellowish colors of the pileus and gills, together with the ovoid, distinctly ornamented spores, characterize C. croceitinctus. In some collections the cheilocystidia are more versiform than in the type.