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Agaricus hondensis

[ Basidiomycetes > Agaricales > Agaricaceae > Agaricus . . . ]

by Michael Kuo

The smooth stem, the pale fibers on the cap that become brownish with age, the thick ring, and the yellowing flesh in the stem base characterize this woodland, West-Coast species. It often has a phenolic odor, best detected by crushing the flesh in the base of the stem--but the odor can be hard to detect in some collections.


Ecology: Saprobic; growing alone, scattered, gregariously, or in fairy rings in conifer and hardwood forests, frequently where woody debris is present; fall and winter; on the West Coast from British Columbia to California.

Cap: 6-15 cm; convex, becoming broadly convex or flat; dry; fairly smooth or, more commonly, with appressed fibers that are initially pale but darken to brown or reddish brown as the mushroom matures; whitish to pale pinkish brown beneath the fibers.

Gills: Free from the stem; close; whitish at first, becoming pinkish and, eventually, brown.

Stem: 7-20 cm long; 1-2.5 cm thick; equal or slightly tapered toward apex (sometimes with a swollen base); smooth; whitish, becoming pale brownish with age; with a persistent, thick ring.

Flesh: Thick and white throughout; often yellowing on exposure, especially in the stem base. A pinkish stage may follow the yellowish stage in the cap and upper stem.

Odor and Taste: taste not distinctive; odor usually phenolic, especially when the stem base is crushed.

Chemical Reactions: Cap yellow with KOH.

Spore Print: Dark brown.

Microscopic Features: Spores 4.5-6 x 3-4 µ; elliptical; smooth. Pleurocystidia absent; cheilocystidia not easily distinguished from basidioles.

REFERENCES: Murrill, 1912. (Smith, 1949; Smith, 1975; Smith, Smith & Weber, 1979; Arora, 1986; Lincoff, 1992; Chariton, 1997.)

Further Online Information:

Agaricus hondensis at MykoWeb


Agaricus hondensis

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Kuo, M. (2005, February). Agaricus hondensis. Retrieved from the MushroomExpert.Com Web site: