Public Description of Leucopaxillus albissimus (Peck) Singer

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Name: Leucopaxillus albissimus (Peck) Singer
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 Public Description (Default) [Edit]
 Draft For 2008/2009 Eol University Species Pages Initiative By Neeraj (Private)

Description status: Unreviewed

Taxonomic Classification:

Domain: Eukarya
Kingdom: Fungi
Phylum: Basidiomycota
Class: Agaricomycetes
Order: Agaricales
Family: Tricholomataceae

General Description:

Leucopaxillus albissimus is a medium or at times large sized mushroom that is mycorrhizal with conifers or sometime eucalyptus. Some say it may be found decomposing the debris of conifers, but this is unconfirmed. The color of the cap or pileus of this mushroom varies and may be anywhere from white to buff, pinkish, pale brownish to pale tan.
The gills are pale yellowish to white in color are easily separated from the cap as a layer. The base of the stipe has a dense white mycelium.

Diagnostic Description:

Pileus: The Cap is about 3-20 cm broad and the margin is convex and rolled inwardly initially, which later appear convex or depressed. The cap is dry and smooth. It has a velvety texture. The color varies very widely from white to brown and darkens with age at times. The flesh of the gills is a little thick. The odor is mild and has an unpleasant taste.

Gills: The Gills are attached to the stem, appear decurrent and the gills are easily separated from the cap as a layer. The color initially is white but turns buff with age.

Stipe: The stem or stipe is about 3-8 cm long, 2.3-4 cm thick, stout or swollen, enlarged at base when young and then becomes equal at maturity. The surface is smooth and may be finely scaled or hairy. It is white and has a dense mycelial growth at the base.

Odor and Taste: Odor is mild and not distinct or associated with any particular smell. Taste is unpleasant or bitter.

Spore Print: White.

Spores: The Size of the Spores ranges from 5-7 × 3.5-5 µm. They are elliptical, ornamented. They are amyloid. The spores appear spiny with warts which are about 0.4u.

Habitat: They are saprobic and are commonly found scattered, gregarious in arcs or rings, mostly under the debris of conifers.

Edibility: Inedible. Though the mushroom is not lethal or toxic, it has an unpleasant taste so it is not palatable.


This mushroom is found widely distributed over North America and is also known to be found around Europe.


It is known to occur mostly under conifers, and occassionally hardwoods too e.g. Monterey cypress (Cupressus macrocarpa), Monterey pine (Pinus radiata), Coast Redwood (Sequoia sempervirens), and Blue Gum (Eucalyptus globulus).

Look Alikes:

This mushroom is most likely to be confused with a deadly species of Clitocybe, or some Tricholoma spp. that look very similar. Thus caution must be exercised.


Members of the genus Leucopaxillus have been known to persist in the environment for a longer than normal time. This suggests that they are more resistant to bacterial degradation and production of antibiotics that make the mushrooms persist much longer than most.


“Common Name: Large White Leucopaxillus”

Description authors: Tom Volk, Neeraj (Request Authorship Credit)
Description editors: Nathan Wilson, IntoTheFlames

Created: 2008-12-25 20:03:20 CST (-0500) by Tom Volk (TomVolk)
Last modified: 2011-10-25 21:31:49 CDT (-0400) by IntoTheFlames
Viewed: 600 times, last viewed: 2018-11-04 22:14:24 CST (-0500)