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)).

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