Psilocybe graveolens is an extremely rare psilocybin mushroom

Psilocybin mushroom

Psilocybin mushrooms are fungi that contain the psychoactive compounds psilocybin and psilocin. There are multiple colloquial terms for psilocybin mushrooms, the most common being shrooms or magic mushrooms....

 in the section Zapotacorum, which has 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, discovered in the salt marshes or "meadows" of Hackensack, New Jersey

Hackensack, New Jersey

Hackensack is a city in Bergen County, New Jersey, United States and the county seat of Bergen County. Although informally called Hackensack, it was officially named New Barbadoes Township until 1921. As of the 2010 United States Census, the city population was 43,010....

. This mushroom is known for its strong and persistent odor.

It is in the section Zapotecorum; other members of this section include Psilocybe angustipleurocystidiata

Psilocybe angustipleurocystidiata

Psilocybe angustipleurocystidiata is a species of mushroom in the Strophariaceae family....

, Psilocybe argentipes

Psilocybe argentipes

Psilocybe argentipes is a species of fungus in the Strophariaceae family of mushrooms. It is endemic to Japan. Fruit bodies grow on the ground in woody debris, and typically stand tall with caps that are in diameter. They are chestnut brown , and stain blue if bruised or handled...

, Psilocybe collybioides, Psilocybe kumaenorum

Psilocybe kumaenorum

Psilocybe kumaenorum is a species of mushroom in the Strophariaceae family. The mushroom contains the medicinal compound psilocybin....

, Psilocybe muliercula

Psilocybe muliercula

Psilocybe muliercula is a species of mushroom in the Strophariaceae family. The mushroom is native to Mexico and contains the compound psilocybin....

, Psilocybe pintonii

Psilocybe pintonii

Psilocybe pintonii is a species of mushroom in the Strophariaceae family....

, Psilocybe subcaerulipes

Psilocybe subcaerulipes

Psilocybe subcaerulipes is a species of mushroom in the Strophariaceae family. The mushroom contains the medicinal compound psilocybin....

and Psilocybe zapotecorum

Psilocybe zapotecorum

Psilocybe zapotecorum is a psilocybin mushroom which has psilocybin and psilocin as main active compounds.It is in the section Zapotecorum, other members of this section include Psilocybe angustipleurocystidiata, Psilocybe argentipes, Psilocybe aucklandii, Psilocybe barrerae, Psilocybe...

.
The species name means “strongly smelling”: Latin gravis “heavy” and olens participle present of olere “smell”.

• Cap: (1)2 — 3(4) cm in diameter, convex to subumbonate, umbonate or with a slight depression, glabrous, even to slightly striate at the margin, 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 orange brownish, fading to golden yellow to whitish, sometimes with a dark green hue.