Psilocybe quebecensis is a moderately active hallucinogenic mushroom

Mushroom

A mushroom is the fleshy, spore-bearing fruiting body of a fungus, typically produced above ground on soil or on its food source. The standard for the name "mushroom" is the cultivated white button mushroom, Agaricus bisporus; hence the word "mushroom" is most often applied to those fungi that...

 in the section Aztecorum, having psilocybin

Psilocybin

Psilocybin is a naturally occurring psychedelic prodrug, with mind-altering effects similar to those of LSD and mescaline, after it is converted to psilocin. The effects can include altered thinking processes, perceptual distortions, an altered sense of time, and spiritual experiences, as well as...

 and psilocin

Psilocin

Psilocin , an aromatic compound, sometimes also spelled psilocine, psilocyn, or psilotsin, is a psychedelic mushroom alkaloid. It is found in most psychedelic mushrooms together with its phosphorylated counterpart psilocybin...

 as main active compounds. Native to Quebec

Quebec

Quebec or is a province in east-central Canada. It is the only Canadian province with a predominantly French-speaking population and the only one whose sole official language is French at the provincial level....

, it is the most northern known psilocybin

Psilocybin

Psilocybin is a naturally occurring psychedelic prodrug, with mind-altering effects similar to those of LSD and mescaline, after it is converted to psilocin. The effects can include altered thinking processes, perceptual distortions, an altered sense of time, and spiritual experiences, as well as...

 mushroom. http://www.springerlink.com/content/g1421g8p86155216/
Macroscopically this mushroom somewhat resembles Psilocybe baeocystis

Psilocybe baeocystis

Psilocybe baeocystis is a psilocybin mushroom of the Strophariaceae family, it contains the hallucinogenic compounds psilocybin, psilocin and baeocystin....

.

Description

• Cap: 1 — 3(3.5) cm in diameter. Nearly hemispheric to convex at first, becoming subcampanulate to more or less plane when mature, viscid and even to translucent-striate when moist, hygrophanous
  Hygrophanous
  The adjective hygrophanous refers to the color change of mushroom tissue as it loses or absorbs water, which causes the pileipellis to become more transparent when wet and opaque when dry....
  
  , brownish to straw colored, yellowish to milk white when dry. Surface smooth, may become finely wrinkled with age, flesh whitish. Readily stains blue-green where injured.
• Gills: Adnate, thin, moderately broad to swollen in the middle. Grayish yellow with green tones becoming dark brown at maturity, with the edges remaining whitish.
• Spore Print: Dark purplish brown.
• Stipe
  Stipe (mycology)
  thumb|150px|right|Diagram of a [[basidiomycete]] stipe with an [[annulus |annulus]] and [[volva |volva]]In mycology a stipe refers to the stem or stalk-like feature supporting the cap of a mushroom. Like all tissues of the mushroom other than the hymenium, the stipe is composed of sterile hyphal...
  
  : 2 — 3.5(4.5) cm long by 1 — 2(2.5) mm thick. Equal, slightly subbulbous, smooth to striate, brittle, tough, and fibrous, base is furnished with long conspicuous rhizomorphs. Yellowish or brownish towards the base, whitish when dry, partial veil cortinate, and soon disappearing, no annulus
  Annulus (mycology)
  An annulus is the ring like structure sometimes found on the stipe of some species of mushrooms. The annulus represents the remaining part of the partial veil, after it has ruptured to expose the gills or other spore-producing surface. An annulus may be thick and membranous, or it may be cobweb-like...
  
   present, readily bruises blue.
• Taste: Somewhat farinaceous
• Odor: Farinaceous
• Microscopic features: Spores ellipsoid to subovoid in side and face view some spores mango shaped, 8.8 — 11(16) x 6.6 — 7.7(8.8) µm . Basidia 15 — 20(28) µm 4-spored. Pleurocystidia present, 12 — 25(35) x (3)5 — 10(15) µm , very distinctive by their swollen apices, as in Psilocybe cubensis and Psilocybe cyanescens. Cheilocystidia (18)22 — 36 x 5.5— 8.8(10) µm , fusoid-ampullaceous with an extended neck, 2 — 3.3 µm thick, abundant, forming a sterile band, sometimes with a hyaline viscous drop at the apex.

Habitat and formation

Solitary to gregarious, rarely cespitose, on rotting wood, particularly in the outwashes of streams in the decayed-wood substratum of alder, birch, fir and spruce in the late summer and fall. Reported from Quebec, Canada specifically in the Jacques-Cartier River

Jacques-Cartier River

The Jacques-Cartier River is a river in the province of Quebec, Canada. It is 161 km long and its source is Jacques-Cartier Lake in Laurentides Wildlife Reserve, and flows in a predominantly southern direction before ending in the Saint Lawrence River at Donnacona, about 30 km upstream...

 Valley, fruiting at a temperature of 6°C

Celsius

Celsius is a scale and unit of measurement for temperature. It is named after the Swedish astronomer Anders Celsius , who developed a similar temperature scale two years before his death...

 to 15°C from summer to late October. Recently found in the United States (Michigan

Michigan

Michigan is a U.S. state located in the Great Lakes Region of the United States of America. The name Michigan is the French form of the Ojibwa word mishigamaa, meaning "large water" or "large lake"....

).