The North American Species of Crepidotus

31. Crepidotus applanatus var. globigera, (Berk.) Sacc. Syll. Fung. 5: 879. 1887.

Agaricus (Crepidotus) globigera Berk.,Jour. Linn. Soc. 13: 158. 1873.

Illustrations: Figs. 7, 84.

Pileus 1-4 cm broad, flabelliform, hygrophanous, white, in age or when wet becoming dull to dingy or more or less avellaneous, glabrous, at times fibrillose at the base, striatulate when wet. Context thin, white when faded, watery when fresh; odor and taste mild or none.

Lamellae narrow, or at times intermixed with some slightly broader, close or crowded, white, dull cinnamon in age. Pseudostipe at times present.

 Spores in deposit: "ochraceous tawny," 4.5-7.5 (8) µ in diameter, globose or subglobose to slightly ovoid, punctate. Basidia 22-27 x 4-6 µ, 4 -spored. Pleurocystidia none; cheilocystidia 22-50 x 5-9 (12) µ, clavate, subventricose, or more rarely pyriform-vesiculose. Gill trama subparallel, hyphae 4-10 µ broad. Pileus trama interwoven. Cuticle of repent hyphae, at times with scattered to gregarious pileocystidia 35-90 x 3-10 µ, which are subfilamentous, often subcapitate, sometimes resembling the cheilocystidia, more rarely the apices forked. Clamp connections present.

Habit, Habitat, and Distribution: On hardwood (more rarely conifer) logs, Maine, Massachusetts, Michigan, New Hampshire, North Carolina, Tennessee, and California, July-September and December.

Material Studied: CALIFORNIA: Smith 56281; MAINE: Bigelow 11541 (MASS); MASSACHUSETTS: Bigelow 6951, 7078, 8954, 9089 (MASS); MICHIGAN: Smith 37290, 51282, 61202, 66947, 67108, 67140, 67141, 67142; Thiers 3987 (MICH); NEW HAMPSHIRE: Bigelow 11777 (MASS); NORTH CAROLINA: Hesler 24907; TENNESSEE: Hesler 24852.

Observations: We have not been able to study the type. Pilát (1948) reports this variety from New York, Vermont, and Australia. The distinctly larger spores separate it from var. applanatus. In the original publication, this species-name was spelled globigera; in some subsequent publications it is spelled globiger.