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Laccaria fraterna

[ Basidiomycetes > Agaricales > Hydnangiaceae > Laccaria . . . ]

by Michael Kuo

Laccaria fraterna is associated with eucalyptus, and appears to have been introduced to North America along with its mycorrhizal partner. It is a fairly small, reddish brown species with a moderately lined cap and, under the microscope, 2-spored basidia. It appears in coastal California's eucalyptus groves during the winter mushroom season.

Description:

Ecology: Mycorrhizal with eucalyptus and other exotic ornamental trees (including acacia); growing scattered or gregariously; fall and winter; coastal California and other North American locations where eucalyptus has been introduced.

Cap: 1-4 cm; convex, becoming flat and sometimes depressed; faintly to moderately lined; bald or very finely hairy; red-brown, fading to orangish buff.

Gills: Attached to the stem; distant or nearly so; pinkish flesh color.

Stem: 2-7 cm long; 3-5 mm thick; more or less equal; finely hairy and often longitudinally lined; colored like the cap, or a little darker; with white basal mycelium.

Flesh: Pale brownish.

Odor and Taste: Not distinctive.

Spore Print: White.

Microscopic Features: Spores 8.5-11 µ; subglobose to globose; ornamented with spines 1-2 µ long, with bases about 1 µ wide; inamyloid. Basidia 2-spored. Cheilocystidia absent. Pileipellis a cutis of elements 5-15 µ wide, with frequent bundles of upright elements; terminal cells clavate or merely cylindric.

REFERENCES: (Saccardo, 1891) Pegler, 1965. (Vellinga, 1995; Mueller, 1997.) Herb. Kuo 01131102.

Further Online Information:

Laccaria fraterna at Mueller's Laccaria
Laccaria fraterna at MykoWeb

 

Laccaria fraterna

Laccaria fraterna

Laccaria fraterna
Spores

Laccaria fraterna
Basidia



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Kuo, M. (2011, February). Laccaria fraterna. Retrieved from the MushroomExpert.Com Web site: http://www.mushroomexpert.com/laccaria_fraterna.html