, also known as Stuntz's
and Blue Ringers
it is a
family, having psilocybin
main active compounds.
It is in the section Stuntzae, other members of the section include
, Psilocybe meridionalis
, Psilocybe rostrata
, Psilocybe subaeruginascens
subaeruginascens var. septentrionbalis
Etymology and history
mushroom is named in honor of mycologist Daniel Stuntz of the University of
It was originally identified growing on the
University of Washington campus. Also known as Psilocybe
- The pileus is (.5)1 —
2(3.5) cm, obtusely conic to convex, expanding
to convex-umbonate or flat with age. The margin is
translucent-striate when moist and uplifted in age. It is hygrophanous, glabrous, dark chestnut brown
while lighter towards the center. The pileus is olive-greenish at
times, fading to a pale yellowish brown or pale yellow. It is
viscid when moist from a gelatinous pellicle, staining slightly greenish-blue when
injured or with age.
- The gills are adnate or
sinuate or adnexed,
close to sub-distant and moderately broad, yellowish brown at
first, soon violet brown or chocolate brown to blackish violet, and
uniform or somewhat mottled, with whitish edges.
- The spores are (8.2)9.3 — 10.4(13.5) X 6 —
7.1(7.7) x 5.5 — 6.6 µm, subrhomboid in face view, subellipsoid in side view, with a hilar
appendage visible and a truncate apex with a broad germ pore, thick
walled, and dingy yellow brown.
- The stipe is (2)3.5 —
6.5(7.5) cm x (1.5)2 — 4(6) mm, equal or slightly enlarged at the
base, cylindric or subcylindric, twisted striate at times,
flexuous, glabrous to slightly fibrillose, dry, stuffed with a pith and becoming
hollow, and white or whitish silky to ochraceous or brownish
fibrillose. The partial veil thinly membranous, leaving a fragile
annulus that becomes more noticeable as it darkens with spores. It
stains blue-green when injured. The spore
print is dark violacous brown.
- The taste and odor of
Psilocybe stuntzii are farinaceous.
- Microscopic features: The basidia are 16.5 —
33 x 5.5 — 8.8 µm, 4-spored, and hyaline.
Pleurocystidia are absent and
cheilocystidia are 22 — 30 x 4.4 —
6.6 µm, abundant, forming a sterile band, hyaline, lageniform, fusiform-lanceolate or
fusoid-ampullaceous, with an elongate and flexuous neck, and are 1
— 2.2 µm in diameter, sometimes irregularly branched. Clamp
connections are present.
Habitat and distribution
is found growing scattered to gregarious
to cespitose, rarely solitary, in
wood chips and bark mulch, in soils
rich in woody debris, and in new lawns of freshly laid sod or any
newly mulched garden throughout the western region of the Pacific Northwest
. From late July through
December,has been observed growing all year long in
Washington area, also reported from California, rarely as far south as Santa
Cruz.There was a time when this mushroom appeared
in over 40 percent of all new lawns and mulched in areas in the
Sound region of the Pacific Northwest.
Due to a
disappearance of pastures south of Seattle in the
Tukwilla-Kent-Auburn areas, this mushroom now only appears
sporadically in certain new lawns which are well fertilized and
- Mycologia 68(6): 1261 (1977)
- Guzmán, G. The Genus Psilocybe: A Systematic Revision
of the Known Species Including the History, Distribution and
Chemistry of the Hallucinogenic Species. Beihefte zur Nova Hedwigia
Heft 74. J. Cramer, Vaduz, Germany (1983) [now out of print].
- Guzmán G, Ott J. (1976). Description and chemical analysis of a
new species of hallucinogenic Psilocybe from the Pacific
Northwest. Mycologia 68(6):