9 genera
67 species
2 subspecies and varieties
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Boletellus mirabilisadmirable bolete, bragger's bolete
Boletus appendiculatusbutter bolete
Habitat: oaks and tanoaks
Boletus barrowsiiwhite king bolete
Description: Boletus barrowsii is one of the “western edulis” species (see B. edulis). It is distinguished by its overall whitish to pale tan coloration, somewhat soft suede-like texture of the cap surface, strong odor when drying, and characteristic occurrence in the mountains of the southwestern U.S., most often under ponderosa pine. Generally considered to occur only in the Southwest, there have been sporadic reports of it occurring in places such as Idaho and southern California, under trees other than ponderosa pine. In Seattle, a very similar mushroom is fairly common in late spring under oaks and species of Tilia, such as lindens and basswood. Although it was felt that this had to be a different species, preliminary DNA analysis suggests it is very close to B. barrowsii.
Distribution: Southwest United States
Habitat: Under ponderosa pines
Spores: midsummer
Boletus calopusbitter beech bolete, bitter bolete
Description: Boletus calopus has bitter-flesh that differs from B. coniferarum by its more noticeable reticulate stipe that is red in part.
Habitat: Conifer forests
Boletus coniferarumconifer boletus
Habitat: Low- to mid-elevation conifer forests
Boletus eastwoodiaeAlice Eastwood's boletus
Boletus edulisking bolete, penny bun, cep, porcini, steinpilz
Habitat: Occurs with conifers.
Boletus fibrillosus
Description: Boletus fibrillosus is a handsome bolete that often is mistaken for B. edulis. The cap color is some shade of dark brown, often with lighter areas, the cap surface is typically wrinkled and velvety to distinctly fibrillose, the tubes and pores are light yellow or somewhat darker, and the stipe is strongly reticulate, pale at the apex, dark brown below, and covered by white mycelium at the base. The overall aspect is that of a moderate to large cap on a relatively long stipe that often is pinched off at the base. It occurs locally, seldom as more than one or a few fruitbodies, but is widespread in our region in old-growth forests of fir and western hemlock as well as earlier succession forests of western hemlock and Douglas-fir and other mixed forest stands.
Distribution: Widespread in the PNW
Habitat: Occurs in old-growth forests of fir and western hemlock as well as earlier succession forests of western hemlock and Douglas-fir and other mixed forest stands.
Boletus pulcherrimusred-pored bolete
Spores: summer and fall
Boletus rainisii
Description: Boletus rainisii is a medium-sized species with an olive-brown to yellow-brown, velvety cap, yellow tubes, and yellow stipe with some reddish tones near the base. It stains blue to olive-green or greenish black instantly when cut or handled, and has a mild taste. It occurs in coastal conifer forests but seems to be rare.
Boletus regineusqueen bolete
Description: Boletus regineus is the darkest species, with almost black caps at times, and often a whitish bloom over the surface when young. It is associated with oaks and madrone.
Substrate: Oaks and madrone
Boletus regiusred-capped butter bolete
Habitat: oak
Spores: Spring, summer, and fall
Boletus rex-verisspring king bolete, spring king
Boletus rubellusruby bolete
Habitat: Grassy areas, mossy lawns, or along the edges of trails, always near trees such as oaks, cottonwood, willow, and basswood or linden.
Boletus rubripesbitter bolete, red-stemmed bitter bolete
Distribution: Widespread but not particularly common in the PNW region.
Habitat: It was described from coastal conifer and mixed forests in California, but in the PNW, occurs in montane conifer forests.
Spores: summer and fall
Boletus smithiiSmith's Boletus
Boletus subtomentosusboring brown bolete, suede bolete, yellow-cracked bolete
Description: Boletus subtomentosus is a large olive-brown to yellow-brown or brown species. It bruises blueish or blueish green, although not always strongly.
Boletus truncatus
Description: Boletus truncatus is a common species in conifer forests and can only be separated from B. chrysenteron by looking at the spores, which are truncate on one end.
Habitat: Conifer forests
Boletus zelleriZeller's bolete
Distribution: Common in coastal and low elevation conifer forests.
Habitat: Occurs in urban areas, parks, along trails, and in other areas where conifers occur.
Chalciporus piperatoides
Description: Chalciporus piperatoides is similar in appearance, but the tubes stain bluish and the spore-print is olive rather than brown.
Chalciporus piperatuspepper bolete, peppery bolete
Description: Also known as Boletus piperatus, Chalciporus piperatus is unique among PNW boletes in its overall coloration, small to medium size, and rather slender stipe. The cap is viscid when fresh but may become somewhat fibrillose and cracked in older specimens, reddish brown to rust brown or vinaceous brown, often with a mix of yellowish brown, and sometimes becoming more ochraceous brown in age. The tubes are yellowish to reddish yellow and the pores are angular, red to reddish brown, and darken when bruised. The stipe is rather slender and reddish brown or colored like the cap, except for the base which is covered with bright yellow mycelium. The flesh of the cap is yellowish buff or somewhat vinaceous to pinkish, and in the stipe brownish buff above and bright yellow in the base. The name “piperatus” comes from its peppery taste.
Distribution: It is widespread and can be rather common in some years, but usually is not abundant.
Habitat: woodland
Gastroboletus turbinatusbogus bolete, gastroid bolete
Description: The genus Gastroboletus is used for secotioid fungi that are similar to species of Boletus. Usually a cap is present and typically it is rounded or flattened with the margin turned down. However, in G. ruber (Zeller) Cázares & Trappe (= Truncocolumella rubra Zeller), the cap is so reduced that it looks like a false truffle without a complete peridium. In most Gastroboletus species the tubes are elongated, curved or contorted, and often olive to brown. The stipe is usually short and stout or sometimes forms a columella. G. turbinatus is our most common species, occurring from spring through fall. At first glance, the fruitbody looks like a bolete, such as Boletus chrysenteron---the cap is velvety and brown with yellowish and reddish areas, the stipe is rather short, pointed below, yellowish with small reddish scales and granules, and the pores are rather large, reddish and stain blue. The tubes are long, curved, yellow to greenish yellow and clearly indicate its secotioid nature. The flesh is yellowish, with some red just below the cap cuticle, and the whole interior stains blue after cutting.
Distribution: Broad
Gyroporus castaneuschestnut bolete
Leccinum aurantiacumorange-capped bolete, red-capped scaber-stalk, aspen scaberstalk
Leccinum insigneaspen bolete, aspen rough-stem, aspen scaber-stalk
Habitat: Associated with aspen
Leccinum manzanitaemadrone bolete, manzanita bolete, manzanita mushroom
Habitat: Associated with Arbutus and Arctostaphylos.
Substrate: Soil.
Leccinum scabrumbrown birch-bolete, birch bolete, common scaber-stalk, birch scaberstalk
Habitat: Common in urban and suburban settings and less so in natural habitats. Occurs with birch.
Phylloporus rhodoxanthusgilled bolete
Porphyrellus porphyrosporusdark bolete, dusky bolete
Distribution: Widespread but not abundant.
Habitat: P. porphyrosporus occurs in coastal and low elevation conifer forests.
Suillus albivelatusnorthern pine bolete
Habitat: S. albivelatus occurs in mixed conifer forests and appears to be associated with pines.
Suillus americanusAmerican slippery cap, American slippery jack, chicken-fat Suillus
Suillus brevipesshort-stemmed bolete, short-stemmed slippery jack, stubby-stalk, short-stalked Suillus
Habitat: It occurs primarily with two-needle pines during late summer and fall
Suillus caerulescensfat jack, blue-staining Suillus, Douglas-fir Suillus
Habitat: Occurs with Douglas fir
Suillus cavipeshollow bolete, hollow-stalked larch bolete, hollow-foot, hollow-stalked tamarack jack, hollow-stemmed tamarack jack, hollow stalk, hollow-stalked larch Suillus
Habitat: associated with larch when it occurs in the PNW.
Suillus granulatusgranulated bolete, milk bolete, weeping bolete, dotted-stalked slippery jack, granulated slippery jack, dotted-stalk Suillus
Suillus grevilleielegant bolete, larch bolete, tamarack jack, larch Suillus
Habitat: Associated with larch.
Suillus lakeiLake's bolete, western painted bolete, matte jack, Lake's slipperycap, western painted Suillus
Habitat: Occurs under Douglas fir.
Suillus luteusslippery jack
Suillus neoalbidipespale slipperycap
Suillus ochraceoroseusrosy bolete, rosy larch bolete
Habitat: Occurs with larch in higher and interior conifer forests, mostly in late spring and summer.
Suillus placiduswhite Suillus
Suillus ponderosusheavy bolete
Suillus pseudobrevipesveiled short-stemmed slippery jack, pine slipperycap
Suillus punctatipes
Habitat: S. punctatipes is common in our moist conifer forests in fall, sometimes appearing in substantial numbers with true fir and western hemlock.
Suillus sibiricusSiberian slippery jack
Suillus subolivaceusslippery Jill, olive-capped Suillus
Suillus tomentosuswoolly pine bolete, blue-staining slippery jack, poor man's slippery jack, tomentose Suillus, woolly-capped Suillus, woollycap
Distribution: Very common and abundant in the PNW.
Habitat: S. tomentosus occurs primarily under lodgepole and shore pines.
Suillus umbonatusjellied bolete, slim jack, umbonate slippery jack
Distribution: It is broadly distributed in the Northern Hemisphere.
Habitat: It is rather abundant at times in lodgepole pine forests in late summer and early fall, and in shore pine woodlands in fall, sometimes growing in clusters and lining the edges of moist depressions.
Suillus viscidusgrayish larch bolete
Habitat: Associated with larch.
Xerocomellus chrysenteroncracked-cap bolete, red-cracked bolete, red-cracking bolete, yellow-fleshed Boletus
Distribution: Northern hemisphere.
Habitat: Temperate mixed hardwood/coniferous forests.
Substrate: Soil.
Xerocomellus rainisiae
Distribution: Primarily west of the Cascade Crest, but some extension east of the crest. Coniferous forests from sea level to higher elevations. Maritime Pacific Northwest, from Vancouver Island to Oregon. May also extend to eastern slopes of the Cascades.
Habitat: Mixed coniferous forests.
Substrate: Soil.