Public Description of Agaricus subrufescens Peck

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Name: Agaricus subrufescens Peck
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Description status: Unreviewed

Taxonomic Classification:

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

General Description:

Cap: 7-25 cm; round, sometimes shaped like a marshmallow when young, becoming convex to nearly flat; surface dry, when young covered with fine matted fibrils which break up into tiny scales, except at the center; fibrils pallid, buff, pale brown, or pinkish-brown; scales becoming darker brown or reddish with age; background color white to pinkish-buff; sometimes yellowing with age or when bruised.

Gills: Free from the stem; close; whitish when young, becoming pinkish, then reddish brown, and eventually dark chocolate brown.

Stem: 5-15 cm long; 1-4 cm thick; equal or enlarged at base; with a thick membranous partial veil which has cottony patches on the underside and which forms a high, skirt-like ring; white to pinkish above the ring; smooth or with fibrils or scales below; base often staining yellow with age or when bruised (but the flesh inside does not stain bright yellow when cut); base often with mycelial threads attached.

Flesh: Thick; firm; white; bruising very slightly yellow or not at all.

Odor and Taste: Like almonds.

Chemical Reactions: Cap yellow with KOH.

Spore Print: Dark brown.

Microscopic Features: Spores 5.5-7.5 × 4-5 µ; elliptical; smooth; inamyloid. Pleurocystidia absent; cheilocystidia 10-15 × 4-5 µ; abundant; inflated.


eastern North America as well as California

Saprobic; growing scattered or in dense groups on rich humus, manure, and in particular on compost.

Look Alikes:

Agaricus augustus




Meyers, R. (2005, September). Agaricus subrufescens. Retrieved from the MushroomExpert.Com Web site:


“Common Name: Almond Mushroom”

Current Name:
Agaricus subrufescens Peck, Ann. Rep. N.Y. St. Mus. 46: 25 (1894) 1893

Agaricus rufotegulis Nauta, Persoonia 17(2): 230 (1999)
Agaricus rufotegulis var. hadriaticus Lancon. & Nauta, Boll. Gruppo Micol. ‘G. Bresadola’ (Trento) 47(2): 17 (2006) 2004
Agaricus rufotegulis Nauta, Persoonia 17(2): 230 (1999) var. rufotegulis
Fungus subrufescens Kuntze, Revis. gen. pl. (Leipzig) 3(2): 480 (1898)
Psalliota subrufescens (Kuntze) Kauffman, Publications Mich. geol. biol. Surv., Biol. Ser. 5 26: 239 (1918)

Description author: walt sturgeon (Request Authorship Credit)
Description editors: Erlon, IntoTheFlames, Jacob Kalichman

Created: 2010-02-12 16:12:55 CST (-0600) by Erlon (Herbert Baker)
Last modified: 2017-07-09 17:43:09 CDT (-0500) by Jacob Kalichman (Pulk)
Viewed: 372 times, last viewed: 2018-11-21 02:54:03 CST (-0600)