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Psilocybe weilii

Guzman, Tapia and Stamets



Image source: The Wikipedia Psilocybe weilii article

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Psilocybe weilii is a psilocybin mushroom in the section Cordisporae having psilocybin and/or psilocin as main active compounds. Originally mistaken for Psilocybe caerulescens var. caerulescens, it is named after Andrew Weil, the famous integrative medicine physician. Andrew Weil biographic note


Description

  • Cap: (2)3 - 6(8.5) cm, Obtusely conic to convex to campanulate, margin incurved or inrolled when young, becoming irregularly lobulated then straight with age, subumbunate, hygrophanous, glabrous, subviscid when moist from separable gelatinous pellicle, translucent-striate at the margin, purple brown or chestnut brown to dark brown, fading to buff or straw yellow as it dries, with the center remaining blackish brown. Often with white scale like remnants along the margin, flesh white, strongly bruising blue with some specimens becoming completely bluish black.
  • Gills: Subadnate to sinuate, close, cream to light brown or brownish yellow, becoming purple brown as the spores mature, edges subflocose and remaining whitish.
  • Spores: Dark violet brown, (5.5)6 - 7(7.5) x 5 -6(6.5) micrometers.
  • Stipe: (2.5)4 to 7 cm long (4)5 - 10 mm thick. Equal, slightly subulbous, hollow, whitish to yellowish becoming bluish black and drying to greyish straw with vinaceous tones, whitish subfloccose patches near the base and pruinose or smooth towards the upper region, veil well formed, sometimes leaving a partial annular zone, bruising bluish to blackish when injured, sometimes with the entire stipe completely blue or with vinaceous tones.
  • Taste: Farinaceous.
  • Odor: Farinaceous.
  • Microscopic features: Spores thick walled with broad germ pore, 6 - 7 x 5 - 6 x 5 micrometers, subrhomboid to subellipsoid. Pleurocystidia subfusoid to sublageniform, 16 - 22 x 5 - 10 micrometers. Cheilocystidia long necked, lageniform, sometimes forked, 20 - 38 x 5 - 7 micrometers.


Habitat and formation

Gregarious to cespitose, May through early December, found under Loblolly Pine and Sweet Gum, in bermuda grass or fescue, often in red clay soil that is enriched with pine needles, urban lawns, in the deep woods on areas where decaying wood collects. There is often a smaller fruiting in spring. Found only in northern Georgia.



Range:
Range of Psilocybe weilii

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