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Stropharia hornemannii

[ Basidiomycetes > Agaricales > Strophariaceae > Stropharia . . . ]

by Michael Kuo

Stropharia hornemannii is a large, charismatic Stropharia with a slimy, reddish brown to purple-brown or brown cap and a thick, scaly stem. Its range is apparently limited to the conifer forests of northern and montane areas. It tends to grow in clusters, and is often found fruiting from well decayed wood.


Ecology: Saprobic; growing alone, scattered, or in clusters on duff and woody debris in conifer forests; often found fruiting from well decayed wood; summer and fall; widely distributed in northern and montane North America.

Cap: 4-16 cm; convex, becoming broadly convex or flat (sometimes broadly bell-shaped); slimy; reddish brown to purple-brown, brown, or olive brown--often fading to tan or pale yellowish brown; smooth; occasionally with white partial veil remnants near the margin.

Gills: Attached to the stem or beginning to pull away from it; close; pale gray at first, later purplish gray to purple-black.

Stem: 5-15 cm long; up to 2.5 cm thick; equal; dry; with a persistent, skirtlike, white ring that becomes dusted with purple-black spore dust; conspicuously shaggy-scaly, especially when young; base often with mycelial threads.

Flesh: White.

Odor and Taste: Somewhat foul.

Spore Print: Dark purple-brown to blackish.

Microscopic Features: Spores 10-14 x 5.5-7 µ; smooth; elliptical. Chrysocystidia present. Cheilocystidia present.

Stropharia depilata, Psilocybe hornemannii, and Naematoloma hornemannii are synonyms.

REFERENCES: (Fries, 1818) Lundell & Nannfeldt, 1934. (Persoon, 1801 [Agaricus depilatus]; Saccardo, 1887; Kauffman, 1918; Stamets, 1978; Smith, Smith & Weber, 1979; Arora, 1986; Phillips, 1991/2005; Lincoff, 1992; Barron, 1999; Roody, 2003; McNeil, 2006; Miller & Miller, 2006.)

Further Online Information:

Stropharia hornemannii at Roger's Mushrooms


Stropharia hornemannii

Stropharia hornemannii

Stropharia hornemannii

Stropharia hornemannii

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Kuo, M. (2007, October). Stropharia hornemannii. Retrieved from the MushroomExpert.Com Web site: