Summary:
Features include a fan-shaped, white, dry cap, close gills with fringed edges, a short or absent stem, and microscopic characters. The description is derived from Hesler(3).
The type of Crepidotus occidentalis was found in WA (Hesler). It has also been recorded from BC (Gamiet).
Cap:
1-3cm, fan-shaped, margin incurved; "pure white and remaining so even when dried"; dry, minutely pubescent [downy]
Flesh:
white
Gills:
adnate if stem present, or converging to a point, close, broad to moderately broad; edges fimbriate [fringed]
Stem:
absent or short
Microscopic spores:
spores 7-10 x 5-6(7) microns, elliptic to suboval, slightly inequilateral in side view, smooth, [no germ pore], brown (dark clay color); basidia 4-spored, 26-34 x 7-9 microns; pleurocystidia none, cheilocystidia 33-55 x 4-7 microns, filamentous, cylindric, subventricose [somewhat wider in middle], or subclavate [somewhat club-shaped]; cap cuticle "of repent hyphae, bearing a turf of straight, long, slender hyphae"; clamp connection present on the trichodermial hyphae
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