Public Description of Suillus cavipes (Opatowski) Smith & Thiers

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Name: Suillus cavipes (Opatowski) Smith & Thiers
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Description status: Unreviewed

Taxonomic Classification:

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

General Description:

Cap: 3-10 cm; convex becoming broadly convex or flat, sometimes with a broad central bump; fairly dry; densely hairy with whitish to brownish hairs and fibers; yellowish brown, reddish brown, or brown; usually with white partial veil remnants on the margin.

Pore Surface: Yellow or greenish yellow; not bruising; pores angular and radially arranged (but not boletinoid), about 1 mm across; tubes to 5 mm deep.

Stem: 4-9 cm long; .5-1.5 cm thick; sometimes somewhat bulbous; yellow and smooth toward the apex, brownish and hairy below; sometimes with a fragile ring; hollow in the base.

Flesh: White to yellowish; not staining on exposure.

Odor and Taste: Not distinctive.

Chemical Reactions: Cap surface red with ammonia; black with KOH; negative with iron salts. Flesh sea green with ammonia; negative or yellowish with KOH; negative with iron salts.


Mycorrhizal with tamarack (Larix laricina); growing alone or gregariously; fall; northeastern and northern North America. Arora (1986) documents Suillus cavipes under “larch” (probably Larix occidentalis) in Oregon and Washington.


Under larch, often in bogs.




Kuo, M. (2004, November). Suillus cavipes. Retrieved from the MushroomExpert.Com Web site:


Current Name:
Suillus cavipes (Opat.) A.H. Sm. & Thiers, Monogr. North Amer. Species Suillus: 30 (1964)

Boletinus cavipes (Opat.) Kalchbr., Icon. Sel. Hymenomyc. Hung. 25: 52 (1867)
Boletinus cavipes f. aureus (Rolland) Singer, Revue Mycol., Paris 3(4-5): 167 (1938)
Boletinus cavipes var. aureus Rolland, Bull. Soc. mycol. Fr. 4(2): 139 (1888)
Boletinus porosus (Berk.) Peck
Boletopsis cavipes (Opat.) Henn., in Engler & Prantl, Nat. Pflanzenfam., Teil. I (Leipzig) 1**: 195 (1898) 1900
Boletus cavipes Opat., Commentation Historico-Naturalis de Familia Fungorum Boletoideorum (Berolini) 2(1): 11 (1836)
Boletus porosus (Berk.) Sacc., Syll. fung. (Abellini) 9: 160 (1891)
Euryporus cavipes (Opat.) Quél., Enchir. fung. (Paris): 163 (1886)
Paxillus porosus Berk., J. Bot., Lond. 6: 314 (1847)

Description author: walt sturgeon (Request Authorship Credit)

Created: 2011-12-06 10:55:05 CST (-0600) by walt sturgeon (Mycowalt)
Last modified: 2013-12-28 20:41:14 CST (-0600) by walt sturgeon (Mycowalt)
Viewed: 81 times, last viewed: 2018-07-19 23:32:37 CDT (-0500)