Psilocybe semilanceata, also known as Liberty Cap, is a hallucinogenic mushroom that contains the psychoactive compounds psilocybin. It has a distinctive yellowish conical to bell-shaped cap with a small nipple-like protrusion on the top. The mushroom grows in scattered trooping groups, on soil amongst grass in lawns and pastures favouring hilly sites.
pallid ochraceous-brown, hygrophanous, drying buff and varies in shape from sharply conical to bell-shaped, often with a prominent papilla. It does not change shape considerably as it ages. The cap margin is initially rolled inward but unrolls to become straight or even curled upwards in maturity. Gills
moderately crowded together, and they have a narrowly adnexed to almost free attachment to the stem. Spores
are purplish-brown. Stem
slender yellowish-brown and usually slightly thicker towards the base.
Psilocybe fimetaria has a white veil at the margin. It grows in horse manure. There are also several other species the mushroom can be confused with.
on the www.first-nature.com web site.