Psilocybe subaeruginascens

A species of Psilocybe

The cap is 1–6 cm, conical to convex, tan brown, hygrophanous, margin striate when moist, and often has a broad umbo. It bruises bluish where damaged. The gills are crowded, sometimes forking, slightly mottled, cream color when young, violet brown in age, with adnate to adnexed and sometimes subdecurrent attachment. The spores are dark violet brown, rhomboid to subrhomboid to subellipsoid, and 7.5-12 x 6.5-8.5 µm. The stipe is 2.5 to 6.5 cm long, .2 to .3 cm thick, white to gray, finely striate, and equal to slightly enlarged near the base. It has a well-developed partial veil which leaves a persistent membranous annulus on the upper stem. It bruises blue where damaged. The taste and odor are farinaceous.