209 species
4 subspecies and varieties
Show only taxa with photos
Order by:
Scientific name
Common name
Display as:
Cortinarius absarokensis
Habitat: Subalpine forests
Substrate: Willow
Cortinarius acutus
Distribution: C. acutus occurs in nutrient-poor conifer forests, often on moist sites in litter, and can be found throughout the north temperate regions.
Cortinarius alboviolaceussilvery-violet cortinarius, pearly webcap
Cortinarius aurantiobasis
Habitat: C. aurantiobasis tends to occur in wetter habitats with conifers, often near western hemlock and/or Sitka spruce, and frequently among sphagnum or other mosses.
Cortinarius brunneus
Habitat: Conifer forests
Cortinarius callisteustawny webcap
Cortinarius camphoratusgoatcheese webcap
Description: Cortinarius camphoratus is a completely blue-violet species with a very strong disagreeable odor, not unlike rotting potatoes.
Cortinarius caninus
Spores: summer
Cortinarius caperatusgypsy, gypsy mushroom
Distribution: Common in certain years in the PNW, but becomes less abundant inland and to the south
Cortinarius cinnamomeuscinnamon Cort, cinnamon webcap
Cortinarius clandestinus
Habitat: Western conifer forests, extending from lower elevations into the higher mountains
Cortinarius collinitusbelted slimy Cortinarius
Cortinarius colymbadinus
Habitat: high-elevation conifer forests near melting snowbanks
Spores: early spring
Cortinarius crassusstout webcap
Cortinarius croceus
Distribution: Common and widespread
Habitat: C. croceus occurs throughout north temperate forests and into alpine and arctic areas. It grows with various conifers, as well as hardwoods including beech, birch, and willow.
Cortinarius cupreorufuscopper-red webcap
Cortinarius cyanitesblushing webcap
Cortinarius decipienssepia webcap
Cortinarius everniussilky webcap
Cortinarius gentilisdeadly cortinarius, goldband webcap
Distribution: Broad
Habitat: C. gentilis has a broad ecological range, occurring in moist environments as well as drier, upland conifer sites. During the summer in the western mountains it can be very common, often fruiting in groups, sometimes from well rotted woody debris.
Cortinarius glandicolor
Description: Cortinarius glandicolor is similar to C. brunneus, but has more slender fruitbodies and is less likely to have a distinct ring-zone on the stipe.
Habitat: Conifer forests
Cortinarius glaucopusbulbous Cortinarius, blue-foot webcap
Cortinarius hinnuleusearthy webcap
Cortinarius infractussooty olive Cortinarius, bitter webcap
Cortinarius iodesspotted Cort, viscid violet Cort
Cortinarius lanigerbrown cortinarius, hoary webcap, woolly webcap
Distribution: Widespread, but variable in its fruiting, in some years being rather common and in others being absent.
Habitat: C. laniger is characteristic of boreal and montane conifer forests.
Cortinarius magnivelatus
Description: Cortinarius magnivelatus appears to be one of the more widespread species. It is rather thick-fleshed and tough, and at first white overall because of the heavy veil that covers the stipe and gills. In age the cap develops yellowish to brownish colors. The gills are white to grayish then brown from the spores, and often forked near the stipe. The stipe is rather long and bulbous with a slightly tapered base. The veil is persistent, often covers much of the stipe, and is firmly attached to the edge of the cap. The flesh is white, and the odor is not distinctive. The spores are rather large, up to 12 um long, and strongly ornamented.
Cortinarius malachius
Description: C. malachius is somewhat similar to C. alboviolaceus but it has a grayish white to grayish brown cap that may have lilac colors when young, and with a finely scaly surface when dry.
Cortinarius montanus
Description: Cortinarius montanus varies in color but is usually fairly easy to recognize. As with many phlegmaciums it is medium-sized to large and rather fleshy with a distinct bulbous base that is covered at first by a distinct pale yellow-green veil and basal mycelium. Typically the cap is viscid, variegated and spotted hazel brown to deep brown with light yellowish olive colors on the margin, and typically becomes more brownish in older specimens. The flesh is whitish or tinged with the colors of the cap, and in the stipe is whitish in the center and bluish near the surface; the odor is not distinctive. The gills are close, rather narrow and light yellowish olive to olive at first, eventually becoming more brownish. The stipe is bluish to grayish blue beneath white silky fibrils when fresh and sometimes discolors purplish when handled. The spores are elliptical and distinctly ornamented.
Distribution: Cortinarius montanus can be very common and widespread, but often occurs as one or a few fruitbodies at a time.
Habitat: Common in older, cool, moist conifer forests.
Cortinarius mucifluusslimy webcap
Habitat: Moist conifer forests
Cortinarius mucosusslimy cortinarius, orange webcap
Description: Cortinarius mucosus has a white stipe that most frequently occurs with pines.
Habitat: Pines
Cortinarius multiformis
Habitat: Acidic conifer forests
Cortinarius muscigenus
Description: Cortinarius muscigenus is a cylindrical-stiped species with a viscid cap and stipe classified in subgenus Myxacium. The myxaciums have a universal veil composed of patches and fibrils that is covered with gelatinous material when fresh and that, in most species, breaks into bands and patches as the stipe elongates. These species can be split into two groups based on the presence or absence of clamp connections. C. muscigenus is a member of the former group, which is related to the secotioid species Thaxterogaster pinguis. It is a medium to large species with a strongly gelatinous, brownish orange to brownish red or ochraceous brown cap, which often is darkest in the center and striate near the edge. The flesh is fibrous, white to yellowish, and typically turns brownish in the lower stipe. The gills are grayish white or grayish brown then cinnamon in age. The stipe is whitish, except for the inner veil which is typically bluish violet, sometimes very faintly so. The spores are almond-shaped and coarsely ornamented.
Distribution: C. muscigenus varies in abundance from year to year, and in some seasons can be very common.
Habitat: mid- to high elevation conifer forests
Cortinarius mutabilispurple-staining cortinarius
Habitat: Occurs in a variety of habitats with different conifers and is more frequent in moist areas. Most commonly found along the coast, especially with Sitka spruce.
Cortinarius neosanguineusblood-red cortinarius, northern red-dye, blood-red webcap
Cortinarius olympianus
Distribution: Varies in abundance from year to year
Habitat: Low to mid-elevation conifer forests
Cortinarius pallidifoliuspale cortinarius
Cortinarius percomisfragrant Cortinarius
Cortinarius pluvius
Origin: Native
Cortinarius porphyropus
Description: Cortinarius porphyropus is a purple-staining species that occurs in the PNW in mixed woods.
Cortinarius pseudobulliardoides
Distribution: Northern hemisphere.
Habitat: Coniferous forests, under Abies, Picea, Pinus and Tsuga.
Substrate: Soil.
Cortinarius purpurascensbruising webcap
Description: Cortinarius purpurascens has a viscid ocher-brown to red-brown or darker brown cap with a violet stipe and gills, and a bulbous base with a rim; in our region, it is most commonly found along the coast, especially with Sitka spruce.
Cortinarius rubellusdeadly webcap
Cortinarius salor
Habitat: C. salor is found in a wide range of forest types
Cortinarius smithiiwestern red-capped Cortinarius, western red-dye
Cortinarius subtortusincense webcap
Cortinarius talushoney webcap
Habitat: Subalpine forests
Cortinarius traganuspungent Cort, lilac conifer Cortinarius, gassy webcap
Distribution: Broad
Habitat: Abundant in the far-western mountane and boreal regions, but is much less frequent in the Rocky Mountains.
Cortinarius trivialisearly Cortinarius
Cortinarius vanduzerensispointed Cortinarius
Distribution: Common
Habitat: Coastal conifer forests from northern California to southern Canada.
Cortinarius variicolorcontrary webcap
Cortinarius variosimilis
Description: Cortinarius variosimilis is a close, but distinct, relative of C. varius of Europe. In many ways, it is a pale form of the latter, lacking its distinctly bright lilac-blue gills and the strong yellow-brown to orange-brown colors of the cap. C. variosimilis has a yellow-brown cap often with white veil remnants along the edge, the gills are pale lilac or almost lack lilac color, and become gray-brown. The stipe is clavate, white or pale pinkish buff, and often coated with wooly white veil material. Potassium hydroxide turns the white flesh bright yellow.
Distribution: Broad
Habitat: Western North America, occurring both in Rocky Mountain spruce-fir forests and the forests of the Cascades and coastal ranges.
Cortinarius venetus var. montanus
Description: Cortinarius venetus var. montanus can be found in our region with conifers; its color is more olive-green to yellow-green, the cap is finely tomentose when fresh, and it has a sulfur-yellow veil when young. It has rounded, finely ornamented spores and fluoresce bright yellow in ultraviolet light.
Cortinarius vernicosus
Substrate: Conifer
Spores: Spring
Cortinarius vibratilis
Habitat: Common in conifer forests
Cortinarius violaceusviolet Cort, violet Cortinarius, violet webcap
Distribution: In some years it is difficult to find but in general it is commonly encountered, but usually in small numbers.
Habitat: Widespread in older forests in PNW region, but much less common in the interior mountains than nearer the coast.