Main Page | See live article | Alphabetical index Psilocybe semilanceata Scientific classification Kingdom: Fungi Domain: Eukaryota Division: Basidiomycota Class: Hymenomycetes Order: Agaricales Family: Strophariaceae Genus: Psilocybe Species: semilanceata Binomial name Psilocybe semilanceata Liberty cap (Psilocybe semilanceata) is a hallucinogenic mushroom, a so called magic mushroom, that grows on grassy meadows and similar. Liberty cap is also the name of a type of hat, also known as a "Phrygian cap". The mushroom was named for its resemblence to this headgear. See: Phrygian cap This article is from Wikipedia. All text is available under the terms of the GNU Free Documentation License.