Psilocybe subaeruginascens

Psilocybe subaeruginascens Höhnel

Psilocybe subaeruginascens Höhnel
Psilocybe aerugineomaculans (Höhnel) Singer i Smith

Macroscopic feat.:
  • Cap/Pileus: 1-5.8 cm broad. Conic to convex or campanulate, to broadly subumbonate but not papillate, eventually broadly convex to plane and uplifting in age. Surface viscid when moist, translucent-striate along the margin, soon drying. Orangish brown to olive brown to gray greenish brown, hygrophanous, fading in drying to dull yellow orange to straw colored. Flesh white to concolorous with cap, soon bruising bluish where injured.
  • Gills/Lamellae: Attachment broadly adnate to adnexed, sometimes decurrent, crowded, and sometimes forking. Grayish brown to yellowish brown, eventually (with spore maturity) dark brown and often slightly mottled. Edges concolorous, bruising bluish where bruised.
  • Stem/Stipe: 30-60 mm long by 1.5-3 mm thick. Equal to slightly enlarged near the base, which is often adorned with radiating white rhizomorphs that bruise bluish when injured. Surface and flash whitish to concolorous with the cap, soon bruising bluish. Partial veil membranous, well developed, leaving a persistent membranous annulus in the superior regions of the stem, white in color until bruised, and then bluish, and usually dusted purplish brown from spores. Torn and fragile in age.

Microscopic feat.:
  • Basidio/Spores: Dark purplish brown to dark violet brown in deposit, rhomboid to subrhomboid in face view, subellipsoid in side view, 7.7-12 by 6.6-8.5 µm.
  • Basidia: 4-spored, rarely 1-, 2-, or 3-spored.
  • Pleurocistidia: Fusoid-ventricose with a blunted end, 2.2-2.2 µm thick.
  • Cheilocystidia: Fusoid-ventricose to sublageniform 16-33 by 4.4-5.9 µm, with a neck 2.5-4 µm.

Habitat: Grows gregariously to cespitose on soils enriched with woody debris, in wood chips, and in wood chips mixed with horse dung. Frequently found along trails or road-sides bordering deciduous forests. Fruiting April to July in temperate southern Japan and subtropical Indonesia. Probably extensively distributed between these two localities.

Comment: Moderately potent. Koike et al. (1981) detected psilocybin and psilocin. This squat, collyboid, and annulate Psilocybe is unique to Asia. Guzmán (1983) notes that Singer and Smith's attempted synonymy of Psilocybe subaeruginascens with Stropharia venenata (=Psilocybe venenariata) was in error. See also Psilocybe subfimetaria and Psilocybe stuntzii.

source - Paul Stamets "Psilocybin Mushrooms of the World"

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