Pileus (Cap): 15-40mm in diameter. Convex or conic to campanulate or subumbonate, expanding when mature to more or less applanate but at the same time umbonate or slightly papillate, glabrous, even but slightly translucent-striate at the margin when humid, viscid to lubricous, hygrophanous, reddish brown or vinaceous brown, fading to fulcous brown or pale ochre from the umbo to the margin; in old specimens the pileus is undulate and somewhat rimose, frequently with blue-greenish tints.
Lamellae (Gills): Lamellae adnexed or sinuate, rather close, pale pink brownish to darker brwon chocolate, edges concolorous or somewhat whitish.
Stipe (Stem): 30-60 x 4-7um equal or tapering upwards, becoming hollow or stuffed with white floccose mycelium, surface whitish pink, turning blue to blackish easily when touched or injured; becoming cncolorous in the adults with the pileus especially below or darker, smooth and somewhat glabrous. veil as whit aracnoid fibrils in young stages.
Microscopic features: Spores purplish brown in deposit, 7-8 x 3.5-5um subellipssiod or ellipsoid ovate, both in dave or side veiw. thin walled with a distinct apical germ pore.
Season: August to September rarely in October
Habitat and Distribution: Known only in Mexico, in swamps or muddy soil without any vegitation, very rare among mosses, on the walls of the darker and very humus ravines, in Abies or pinus forests, at 2600-3200m elevation.
Growth Habit: Gregarious to ceaspitose, rarely solitary
Bruising: bruising when handled.
Other Notes: Unable to locate this species in the field, botanist Roger Heim and mycologist Rolf Singer based their descriptions of this mushroom on dried specimens purchased from Matlazinca Indians in the marketplace of Tenango del Valle, in the Nevado de Toluca region of the state of Mexico. In 1958 Roger Heim described this fungus as Psilocybe wassonii, but without any Latin designation; Rolf Singer and Alexander Hanchett Smith described it in the same year as Psilocybe muliercula (muliercula = "little women"). Both descriptions reported this fungus growing in Pinus forests surrounding the town of Tenango del Valle. However, after several expeditions to the area, Mexican mycologist Gaston Guzman located it 10 kilometers from Tenango del Valle in an Abies forest on the slopes of the Nevado de Toluca.