Pulverolepiota petasiformis

Pulverolepiota petasiformis, commonly known as the duncecap powderhead,^[1] is a species of mushroom in the genus Pulverolepiota. It is found in Europe and Africa,^[2] and rare in the Pacific Northwest.^[1]

Pulverolepiota petasiformis
Scientific classification
Kingdom:	Fungi
Division:	Basidiomycota
Class:	Agaricomycetes
Order:	Agaricales
Family:	Agaricaceae
Genus:	Cystolepiota
Species:	P. petasiformis
Binomial name
Pulverolepiota petasiformis (Murrill) H. Qu, Damm & Z.W. Ge
Synonyms
Lepiota petasiformis Murrill Cystolepiota petasiformis (Murrill) Singer (1975) Cystolepiota petasiformis (Murrill) Vellinga (2006)

Pulverolepiota petasifo Mycological characteristics
	Gills on hymenium
	Cap is campanulate or convex
	Hymenium is adnexed or free
	Spore print is white
	Edibility is unknown

Taxonomy

Pulverolepiota petasiformis was first described as Lepiota petasiformis by William Murrill in 1912. Later, it was transferred to the genus Cystolepiota,^[3] and subsequently to Pulverolepiota in 2023.^[4]

Description

The cap of Pulverolepiota petasiformis is 1–5 centimeters in diameter. It can be beige or white, and often has a tan spot in the middle. When young, it is covered in a white powder, but it gets smoother with age. The stipe is 2–7 centimeters long and 2–5 millimeters wide. The gills are whitish when young, but will sometimes turn tan as the mushroom gets older.^[1]

Habitat and ecology

In the Pacific Northwest, Pulverolepiota petasiformis grows in alder leaf litter and under western redcedar trees.^[1]