Panaeolus acuminatus

Panaeolus acuminatus, also known as Panaeolus rickenii, is a species of mushroom in the family Bolbitiaceae.

Panaeolus acuminatus
Scientific classification
Kingdom:	Fungi
Division:	Basidiomycota
Class:	Agaricomycetes
Order:	Agaricales
Family:	Bolbitiaceae
Genus:	Panaeolus
Species:	P. acuminatus
Binomial name
Panaeolus acuminatus (Schaeffer) Quélet 1874
Synonyms[1]
Agaricus acuminatus Schaeff., 1774 Agaricus caliginosus Jungh., 1830 Panaeolus caliginosus (Jungh.) Gillet, 1874 Panaeolus rickenii Hora, 1960 Stropharia acuminata (Scop.) Murrill, 1922

Panaeolus acuminatus Mycological characteristics
	Gills on hymenium
	Cap is convex
	Hymenium is adnexed
	Stipe is bare
	Spore print is black
	Ecology is saprotrophic
	Edibility is unknown

This species contains small amounts of serotonin, 5-HTP, and tryptophan.^{[citation needed]}

Description

P. acuminatus is a small brown mushroom that has black spores. It has a cap that is less than 4 cm across, hygrophanous, conic to campanulate to plane, usually with an umbo. The gills are dark purplish black, crowded, with several tiers of intermediate gills. The spores are (11) 13 - 15 (17) x 9 - 11 (12) x (6.5) 7 - 8 (9) micrometers, smooth, black, and shaped like lemons.^[2] Cheilocystidia present.

Habitat and distribution

P. acuminatus grows in grass and dung. It has been found throughout North America and Europe and is very widely distributed.

See also

• Fungi portal

• List of Panaeolus species