Summary: Liimatainen(11) sequenced the holotype of this species - it matched with a neotype of Cortinarius biformis Fr. 1838, and they listed the former as a synonym of the latter. Features include a hygrophanous reddish brown matte cap, pale brown to vivid brick red to red-brown gills, a whitish silky-fibrillose young stem, growth under conifers, and microscopic characters. The description derived from Knudsen(1).
Cap: 3.5-7.5cm across, hemispheric then low convex to almost flat with obtuse umbo; hygrophanous, reddish brown; fairly matte, "without veil patches or fibrils"
Flesh: brownish white to pale brownish
Gills: medium-spaced; "pale brown, later vividly brick red to red brown"
Stem: 7-15cm x 0.6-1.5cm, cylindric or slightly clavate [club-shaped], "often tapering downwards"; "whitish silky-fibrillose, later more brownish"
Veil: universal veil sparse, white
Odor: indistinct
Microscopic spores: spores 8-9(9.5) x 5.3-5.7 microns, amygdaloid [almond-shaped] to slightly elliptic, "moderately verrucose, more strongly at apex", sometimes thick-walled, "fairly strongly to strongly dextrinoid"; "gill trama hyphae distinctly zebra-striate and densely spot-like incrusted"
Notes: Harrower(1) assigned a BC collection sequence 165 to Cortinarius testaceofolius. Morphological correlation is desirable. It is also found in Europe (Knudsen(1)).
EDIBILITY
Habitat and Range
SIMILAR SPECIES
See the SIMILAR section of Cortinarius neofurvolaesus.
Habitat
in coniferous forests, usually with Picea (spruce), sometimes with Pinus (pine), often deep in mosses, late summer to fall, (Knudsen(1) for northern Europe)