Panaeolus papilionaceus

Panaeolus papilionaceus, also known as Agaricus calosus, Panaeolus campanulatus, Panaeolus retirugis, and Panaeolus sphinctrinus, and commonly known as Petticoat mottlegill, is a very common and widely distributed little brown mushroom that feeds on dung.

Panaeolus papilionaceus
Scientific classification
Kingdom:
Fungi
Phylum:
Basidiomycota
Class:
Agaricomycetes
Order:
Agaricales
Family:
Bolbitiaceae
Genus:
Panaeolus
Species:
P. papilionaceus
Binomial name
Panaeolus papilionaceus
Approximate range of Panaeolus papilionaceus var. papilionaceus
Synonyms

Agaricus calosus
Agaricus campanulatus
Agaricus papilionaceus
Galerula campanulata
Panaeolus campanulatus
Panaeolus retirugis
Panaeolus sphinctrinus

Panaeolus papilionaceus
float
Mycological characteristics
gills on hymenium
cap is convex
hymenium is adnexed
stipe is bare
spore print is black
ecology is saprotrophic
edibility: inedible

This mushroom is the type species for the genus Panaeolus.

Description
  • Cap: 1 – 5 cm across, obtusely conic, grayish brown, not hygrophanous, becoming campanulate in age, margin adorned with white toothlike partial veil fragments when young, flesh thin.
  • Gills: adnate to adnexed close to crowded, one or two tiers of intermediate gills, pale gray, acquiring a mottled, blackish appearance in age, with whitish edges.
  • Spores: 12 - 18 x 7-10 µm, elliptical, smooth, with an apical pore, spore print black.
  • Stipe: 6 – 12 cm by 2 – 4 mm, gray-brown to reddish brown, darker where handled, paler toward the apex, fibrous and pruinose.
  • Odor: Mild.
  • Taste: Unappetizing.
  • Microscopic features: Basidia 4-sterigmate; abruptly clavate. Cheilocystidia abundant; subcylindric, often subcapitate or capitate.

Habitat and formation

Occurring singly, gregariously, or caespitosely on cow/horse dung, moose droppings, and in pastures. Widely distributed in North America in Spring, Summer, and Fall and through the Winter in warmer climates. It can be found in countries including[1] Canada (Alberta,[2] British Columbia), the United States (Alabama, Alaska, California,[2] Colorado, Florida, Georgia,[2] Indiana,[2] Louisiana,[2] Maine, Massachusetts, Missouri, Montana,[2] New Mexico, New York, Oklahoma, Texas,[2] Washington,[2]), the Caribbean (Bahamas, Cuba, San Vincent Island), Chile, Colombia, Uruguay, France, The Netherlands, North Macedonia, Mexico,[2] Norway, Slovenia,[2] South Africa, Uganda, China, Iran, Lithuania, Kuwait, and the Philippines.

Edibility

Panaeolus papilionaceus is inedible,[3] and is neither choice in flavor nor substantial in mass. While similar looking species, such as Panaeolus cinctulus, do contain psilocybin, Panaeolus papilionaceus does not[4]

  • Panaeolus papilionaceus var. papilionaceus

See also

References
  1. Worldwide Distribution of Neurotropic Fungi, Guzman (www.museocivico.rovereto.tn.it)
  2. Panaeolus papilionaceus The Mushroom Observer (mushroomobserver.org)]
  3. Phillips, Roger (2010). Mushrooms and Other Fungi of North America. Buffalo, NY: Firefly Books. p. 236. ISBN 978-1-55407-651-2.
  4. Allen, John W. (2013). Ethnomycological Journals: Sacred Mushroom Studies Volume IX. Santa Cruz, California and Seattle, Washington, respectively: MAPS and Exotic Furays. pp. 130–175. ISBN 158-214-396-X.
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