Amanita pachycolea

Amanita pachycolea, commonly known as the western grisette[1] or the Stuntz's great ringless amanita,[2] is a species of agaric fungus in the family Amanitaceae. It was recognized as a distinct species by mycologist Daniel Elliot Stuntz, and published in 1982 by Harry Delbert Thiers. Found in western North America, it associates with conifers in coniferous and mixed forests. Amanita pachycolea is classified in Amanita section Vaginatae, which includes species with conspicuous radial striations on the cap (8–20 cm wide), inamyloid spores, and the absence of a ring on the stipe (10–25 cm long, 1–3 cm wide, tapering upward).[3][4] The mushroom is edible, but not recommended due to possible confusion with toxic Amanita species.[1]

Amanita pachycolea
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Fungi
Division: Basidiomycota
Class: Agaricomycetes
Order: Agaricales
Family: Amanitaceae
Genus: Amanita
Species:
A. pachycolea
Binomial name
Amanita pachycolea
D.E.Stuntz (1982)
Amanita pachycolea
View the Mycomorphbox template that generates the following list
Gills on hymenium
Cap is campanulate
Hymenium is free or adnate
Stipe has a volva
Spore print is white
Ecology is mycorrhizal
Edibility is not recommended

The cap is brown, sometimes lighter near the margin. The gills are white with gray-brown edges, staining orange-brown in age. The stipe is white to brownish with a fibrillose or scaly surface. The base is enclosed by a thick, felty volva, which is white in youth, then yellow or brownish, sometimes becoming reddish in age.[5]

See also

References
  1. Davis RM, Sommer R, Menge JA (2012). Field Guide to Mushrooms of Western North America. University of California Press. p. 74. ISBN 978-0-520-95360-4.
  2. "Standardized Common Names for Wild Species in Canada". National General Status Working Group. 2020.
  3. Thiers HD, Ammirati JF (1982). "New species of Amanita from western North America". Mycotaxon. 15: 155–166.
  4. Davis, R. Michael; Sommer, Robert; Menge, John A. (2012). Field Guide to Mushrooms of Western North America. Berkeley: University of California Press. p. 74. ISBN 978-0-520-95360-4. OCLC 797915861.
  5. Trudell, Steve; Ammirati, Joe (2009). Mushrooms of the Pacific Northwest. Timber Press Field Guides. Portland, OR: Timber Press. p. 85. ISBN 978-0-88192-935-5.


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