Summary:
Features include flat growth on conifer wood, uneven brown color, soft texture, with a distinct brown zone in the flesh next to the wood. The current name in the online Species Fungorum, accessed November 16, 2020, was Anthoporia albobrunnea, but the current name listed in MycoBank, accessed the same day, was Antrodia albobrunnea. The description is derived from Gilbertson(1).
Antrodia albobrunnea has been found in BC, WA, OR, ID, AB, YT, AK, AZ, MT, WY, CO, UT, and USSR to central Europe and the inner parts of the Scandinavian peninsula, (Gilbertson).
Cap:
up to 0.4cm thick, flat on wood, separable, "soft when fresh, more tough when dry", margin often wide and cottony, clearly marked or with radiating strands when actively growing, white, becoming more pale brown when old
Flesh:
up to 0.1cm thick, cottony; "white to ochraceous and with a distinct cinnamon brown zone next to the substrate"
Pores:
3-5 per mm., circular to angular, usually thin-walled; white at first, "soon pale or reddish-brown, often discoloring in patches, more evenly brown when dry"; tube layer up to 0.3cm thick, white to pale brown
Microscopic:
spores 5-7 x 1.5-2 microns, allantoid to cylindric, smooth, inamyloid, colorless, thin-walled; basidia 4-spored, 15-20 x 4-6 microns, with basal clamp connection; cystidia "none, but sometimes hyphal ends penetrate the hymenium"; hyphal system dimitic, generative hyphae with clamp connections, in the white context and in the trama hyaline and thin-walled, 2-4 microns wide, in the brown layer next to the substrate pale brown and with scattered clamp connections, 3-5 microns wide, skeletal hyphae thick-walled to almost solid, rarely dichotomously branched, 2-5 microns wide
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