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Hi, Psilocybe semilanceata was botanically named and identified by Fries in 1838 as Agaricus semilanceatus, in 1886 as Geophila semilanceata (Fr.) Qu?l; in 1039 as Panaeolus semilanceatus (Fr.) J.E. Lange; and finally (non Psilocybe semilanceata var. caerulescens (Cke) Sacc.)
The probllem with the identification is stiffled by a medical journal report in Sowerby, J., Colored figures of English Fungi or Mushrooms, showing two different detailed line drawings of mushrooms identified as Agaricus semiglobatus and Agaricus glutinous, identifid in the 1960s by Rolf Singer as Psilocybe semilanceata. The mushrooms at that time in 1803 had been known to cause intoxications after a family of five (one father and four minor children) in 1792 became intoxicated with visuals of stuning geodesiccal patterns and kaleidascopic effects. So the earliest known intoxication from this species was in 1799 in London. And the species was named in the late 1930 as P. semilanceata.
The name means:
Psilocybe (Naked or bald headed) and,
Semilanceata (half-speared of half lanced) from the shape of the pelius.
2. Epithets of P. semilanceata used in Europe and elsewhere: Liberty caps, Liberty bells, Pixie caps, Blue legs, Witches Threads and Witches tits.
3. Panaeolus is pronounced as:
Pan as in cooking pan,
nae as in nay,
O as in Oh, and
lahs as in las,