The North American Species of Crepidotus

35. Crepidotus latifolius Pk., Bull. Torrey Club 26: 66. 1899.

Illustration: Fig. 88.

Pileus 2-6 mm broad, sessile, dimidiate, suborbicular, submembranous, resupinate, attached by a tubercle, often dorsally attached, white and slightly pubescent when dry, hygrophanous, striatulate when moist, even when dry. Context white, thin.

Lamellae pallid, becoming pale ferruginous or dull cinnamon, incompletely converging, radiating, very broad, distinctly ventricose, subdistant, extending beyond the margin of the pileus, edges fimbriate.

Spores 4.5-6 (7) µ in diameter, globose, more rarely subovoid, finely punctate, brownish in 2% KOH. Basidia 28-32 x 7-8 µ, 4-spored. Pleurocystidia none; cheilocystidia 31-43 x 6-10 (12) µ, cylindric at times, or ventricose. Gill trama undulating, subparallel, hyphae narrow, 3-7 µ broad. Pileus trama interwoven. Cuticle a cutis, often bearing tangled to loosely arranged, narrow (2-8 µ), colorless hyphae, often forming a trichodermial turf, the terminal elements more or less cystidioid. Clamp connections on the epicuticular hyphae.

Habit, Habitat, and Distribution: On hardwood logs, Ohio, Michigan, and Tennessee, June-July.

Material Studied: MICHIGAN: Smith 66263, 66727; OHIO: Lloyd 49964 (BPI), lectotype, from near Cincinnati, 1902; Walters 5 (MICH); TENNESSEE: Hesler 12270.

Observations: As Singer (1947) found, the box labeled Crepidotus latifolius Pk., at Albany, contains notes but no specimens. However, in the Lloyd Herbarium, National Fungus Collections, at Beltsville, Md., there is a collection by C. G. Lloyd, his No. 49964. Since the type has been lost, it is proposed that this Lloyd collection be designated as the lectotype. The cheilocystidia differ from those of C. praelatifolius.

In Smith's No. 66727, the odor, when collected, was musty, the taste slightly bitter.