Summary:
Features include 1) a whitish silky-fibrillose kidney-shaped cap up to 3cm in diameter, with a rubbery gelatinous layer on the cap and a ciliate margin, 2) gills that are white to pale ochraceous cream to fairly brown, with a separable gelatinous gill edge, 3) mild taste, 4) white spore deposit, and 5) small cylindric spores.

Cap:
0.5-3cm, conchate to kidney-shaped, convex to flat, margin sharp; "hygrophanous, whitish with a faint pink tint when young, later light ocher to pink-brownish and whitish-pruinose in places"; dull to satiny, finely velvety when young, with fine radial wrinkles when moist, margin fringed, peelable, (Breitenbach), pallid to pale pinkish gray (Arora), less than 1.3cm wide, white, (Bessette), 1-2cm across, kidney-shaped; whitish, sometimes weakly brownish; "cap skin removable and elastic like rubber", (Moser), up to 3cm, white to cream; silky-fibrillose, margin thin and ciliate, (Courtecuisse)

Flesh:
elastic, tough, 2-layered, under cap skin with an olive-brown, transparent, gelatinous layer, below that with a watery, gray-whitish layer, (Breitenbach)

Gills:
finely adnexed and surrounding stem in a semicircle, 25-38 reaching stem, 3-7 subgills between each pair of gills, gill broad, some forked at stem; "white when young, later gray-pink to pink-ocherish"; edge "smooth, peelable as a gelatinous thread", (Breitenbach), adnate, fairly broad; white to pale ochraceous cream, (Courtecuisse)

Stem:
0.2-0.7cm x 0.2-0.5cm, "rudimentary to short, laterally attached", cylindric to conic; "with a pink or olive tint, whitish fibrillose-floccose when dry", (Breitenbach), white; tomentose-scaly, (Moser)

Veil:
[none]

Odor:
mushroomy (Breitenbach)

Taste:
mild (Breitenbach)

Microscopic spores:
spores 4.5-6.5 x 1-1.3 microns, cylindric, allantoid [curved sausage-shaped], with droplets; basidia 4-spored, 15-18 x 2.5-3.5 microns, cylindric to cylindric-clavate, with basal clamp connection; pleurocystidia and cheilocystidia not seen; cap three-layered in cross-section: cap cuticle of +/- parallel gelatinized hyphae 1.5-3 microns wide (peelable as membrane), strongly gelatinized intermediate layer with loosely arranged hyphae 0.5-1.0 microns wide, some spiral, trama of +/- parallel hyphae 2-3 microns wide, septa with clamp connections, (Breitenbach), spores 3.5-6 x 1-1.5 microns, cylindric to sausage-shaped, amyloid, (Bessette), spores 3-5 x 1-1.2 microns, cylindric, (Moser), 3.5-6.0 x 0.9-1.2(1.5) microns, sausage-shaped, somewhat curved, almost cylindric, smooth, amyloid, thin-walled, (Brown)

Spore deposit:
white according to literature (Breitenbach)

Notes:
It has been reported from BC (Redhead(5)). There are collections at the University of British Columbia for BC. There are collections at the University of Washington from WA, OR, and ID. It occurs elsewhere including Europe.

EDIBILITY

Synonyms and Alternate Names:
Pleurotus mitis (Pers.: Fr.) Quel.