Cap: 1 — 3(3.5) cm in diameter. Nearly hemispheric to convex at first, becoming subcampanulate to more or less plane when mature, viscid and even to translucent-striate when moist, hygrophanous, brownish to straw colored, yellowish to milk white when dry. Surface smooth, may become finely wrinkled with age, flesh whitish. Readily stains blue-green where injured.
Gills: Adnate, thin, moderately broad to swollen in the middle. Grayish yellow with green tones becoming dark brown at maturity, with the edges remaining whitish.
Spore Print: Dark purplish brown.
Stipe: 2 — 3.5(4.5) cm long by 1 — 2(2.5) mm thick. Equal, slightly subbulbous, smooth to striate, brittle, tough, and fibrous, base is furnished with long conspicuous rhizomorphs. Yellowish or brownish towards the base, whitish when dry, partial veil cortinate, and soon disappearing, no annulus present, readily bruises blue.
Taste: Somewhat farinaceous
Microscopic features: Spores ellipsoid to subovoid in side and face view some spores mango shaped, 8.8 — 11(16) x 6.6 — 7.7(8.8) µm . Basidia 15 — 20(28) µm 4-spored. Pleurocystidia present, 12 — 25(35) x (3)5 — 10(15) µm , very distinctive by their swollen apices, as in Psilocybe cubensis and Psilocybe cyanescens. Cheilocystidia (18)22 — 36 × 5.5— 8.8(10) µm , fusoid-ampullaceous with an extended neck, 2 — 3.3 µm thick, abundant, forming a sterile band, sometimes with a hyaline viscous drop at the apex.