Psilocybe tenax

Pileus 8-15 mm, conico-convex to convex sometimes with small papilla, with straight margin, hygrophanous, when moist translucently striate at least up to half the radius, dark red-brown(Mu. 7.5-5 YR 4/4-3/2), slightly paler and more grey-brown towards margin, strongly pallescent on drying, slightly to distinctly viscid when moist, but pellicle not entirely separable, shining, smooth, without veil or with very minute velar remnants in young stages only. Lamellae, L = 15-24, l = 1-5, rather distant, narrowly adnate, subventricose, ywllow with olivaceous tinge, then red-brown, with slightly paler, fimbriate edge. Stipe 15-60 x 1-2 mm, cylindrical, yellow-brown, entirely finely fibrillose to subfloccose lengthwise with paler fibrils. Context very thin, dark brown in pileus, pallid in inner part of stipe. Smell indistinct. Taste not tried. Spore print very dark purplish brown.
Ecology: Saprotrophic on dead wood and wood-chips, preferably of Picea in boreal and montane forest.
Distribution: Wide-spread, but rare in northern and central Europe.