Public Description of Tapinella atrotomentosa (Batsch) Šutara

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Name: Tapinella atrotomentosa (Batsch) Šutara
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 Public Description (Default) [Edit]
 Draft For Wild Mushrooms Of The Northeastern United States By Erlon Bailey (Private)

Description status: Unreviewed

Taxonomic Classification:

Domain: Eukarya
Kingdom: Fungi
Phylum: Basidiomycota
Class: Agaricomycetes
Order: Boletales
Family: Tapinellaceae

General Description:

Cap: 4-15 cm; convex, becoming flat or vase-shaped; dry; velvety or finely hairy; yellow brown to reddish brown, becoming dark brown in age; the margin inrolled at first.

Gills: Running down the stem; close or crowded; pale to tan or yellowish tan; frequently forked or with cross-veins near the stem.

Stem: 2-12 cm long; 1-3 cm thick; frequently off-central or even lateral; thick and sturdy; pale near the apex, but covered with velvety brown to blackish brown fuzz below.

Flesh: Thick and firm; pale to ochre.

Odor and Taste: Not distinctive.

Spore Print: Yellowish to brownish.

Microscopic Features: Spores 5-6.5 × 3-4.5 µ; smooth; elliptical; dextrinoid.

Diagnostic Description:

On wood (Paxillus involutus is on ground)


widely distributed in northern North America;4 common in Pacific NW2


Saprobic; growing alone or in groups, sometimes in clusters; on conifer stumps or living conifers—also on madrone; summer and fall;

Look Alikes:

Dyes3; related to Paxillus involutus, which is toxic.2 5



2 Arora, Mushrooms Demystified (Ten Speed Press 2d ed. 1986) (as Paxillus atrotomentosus)

3 A.R. Bessette, A.E. Bessette, The Rainbow Beneath My Feet (Syracuse University Press 2001) (as Paxillus atrotomentosus)

4 Kuo, M. (2007, March). Tapinella atrotomentosa. Retrieved from the MushroomExpert.Com Web site:

5 Wood & Stevens, The Fungi of California (a MykoWeb Page)


Current Name:
Tapinella atrotomentosa (Batsch) Šutara, Česká Mykol. 46(1-2): 50 (1992)

Agaricus atrotomentosus Batsch, Elench. fung., cont. prim. (Halle): 89 (1783)
Agaricus atrotomentosus Batsch, Elench. fung., cont. prim. (Halle): 89 (1783) var. atrotomentosus
Agaricus atrotomentosus var. obliquus Alb. & Schwein., Consp. fung. (Leipzig): 226 (1805)
Agaricus atrotomentosus var. omphalodes Alb. & Schwein., Consp. fung. (Leipzig): 226 (1805)
Paxillus atrotomentosus (Batsch) Fr., Epicr. syst. mycol. (Upsaliae): 317 (1838) [1836-1838]
Paxillus atrotomentosus var. atrotomentosus (Batsch) Fr., Epicr. syst. mycol. (Upsaliae): 317 (1838) [1836-1838]
Paxillus atrotomentosus var. bambusinus R.E.D. Baker & W.T. Dale, Mycol. Pap. 33: 92 (1951)
Paxillus bambusinus (R.E.D. Baker & W.T. Dale) Singer, in Singer, García & Gómez, Beih. Nova Hedwigia 102: 94 (1991)
Rhymovis atrotomentosa (Batsch) Rabenh., Deutschl. Krypt.-Fl. (Leipzig) 1: 453 (1844)
Sarcopaxillus atrotomentosus (Batsch) Zmitr., Malysheva & E.F. Malysheva, in Zmitrovich, Malysheva, Malysheva & Spirin, Folia Cryptogamica Petropolitana (Sankt-Peterburg) 1: 53 (2004)

Description author: walt sturgeon (Request Authorship Credit)
Description editor: Joseph D. Cohen