Summary:
Crepidotus submollis is characterized by moderately large, obscurely punctate spores, crooked or contorted cheilocystidia, and straight hyphae on the cap, (Hesler(3)). Other features include a dry, stemless, white cap that becomes cinnamon-buff when old, white gills that become ferruginous then clay color to ochraceous tawny, and growth on hardwood. The description is derived from Hesler(3).
Hesler(3) examined collections from WA, OR, CA, and MI. It was reported in Lowe(1) from BC.
Cap:
1-3cm broad, conchate [shaped like oyster shell], dimidiate [semicircular] to subreniform [somewhat kidney-shaped], becoming flattened, margin remaining inrolled for some time; white, when old becoming somewhat cinnamon-buff; dry, pruinose-pubescent to fibrillose, when old becoming bald, margin sulcate [grooved] or plicate [pleated]
Flesh:
thin; white
Gills:
radiating from lateral point of attachment, close, narrow, becoming ventricose [broader in middle] and broad when old; "white, becoming ferruginous, then clay color to ochraceous tawny"; edges even or crenulate [finely scalloped]
Veil:
[none]
Microscopic spores:
spores 7-9.5 x 4.5-5.5 microns, elliptic to slightly oval in face view, somewhat inequilateral in side view, minutely punctate, [no germ pore]; basidia 4-spored, (22)28-34(39) x 6-8 microns; pleurocystidia none, cheilocystidia 24-50 x 4-10 microns, "crooked and contorted, ventricose, clavate, subcylindric, often forked or knobbed"; cap cuticle "of repent hyphae, or not always sharply differentiated", the surface bearing a turf of colorless, straight hyphae, 3-6 microns wide; clamp connections present
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