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Page number:140 
Remarks (public):The reddish brown resinous margin, sweet odour, and bitter resinous taste are good field characters for identification of A. sitchensis. 
Description type:Non-original description 
Description:Antrodia sitchensis (Baxter) Gilbn. & Ryv. - Mycotaxon 22:364. 1985.- Poria sitchensis Baxter, Papers Mich. Acad. Sci. 23:293, 1938.
Basidiocarps annual to perennial, resupinate, with a strong sweet odor when fresh, tough, drying hard and brittle, effused up to 15 cm, up to 6 mm thick; pore surface cream coloured to light buff, darkening slightly to pale orange brown with age or drying, the pores 4-7 per mm, circular, with thick, entire dissepiments; margin narrowly sterile, often becoming reddish brown and resinous; subiculum cream-coloured, paler than tube layer, azonate, up to I mm thick; tube layer concolorous with pore surface, in older specimens as if soaked with a resinous substance, up to 6 mm thick; taste resinously bitter, scent when fresh described as methanol or «burnt sugar cake».
Hyphal system dimitic; subicular generative hyphae difficult to discern, thin-walled. hyaline. with clamps, 2-4 µm in diam; subicular skeletal hyphae predominant, thick-walled, hyaline, nonseptate, with rare branching, 2-5 pun in diam, often weakly amyloid; tramal hyphae similar; globules of oily looking exudate abundant in sections mounted in KOH.
Cystidia absent, fusoid cystidioles present, 18-24 x 5-6 µm, with a basal clamp. Basidia clavate, 4-sterigmate, 16-20 x 6-7 µm, with a basal clamp.
Basidiospores cylindric, slightly curved, hyaline, smooth. negative in Melzer's reagent. 4-5.5 x 1.5-2 µm.
Type of rot. Brown rot of dead conifers; negative in gum guaiac solution. Cultural characteristics. See Baxter 1938: Lombard 1990.
Sexuality. Heterothallic and bipolar (Lombard 1990).
Substrata. Dead conifers, in Europe known only on Picea abies and Pinus sylvestris, in North America on Abies, Larix, Picea. Pinus. Pseudotsuga, and Tsuga. Distribution. In Europe known only from Estonia and Finland. but likely to be more widely distributed. Common in western North America and probably circumpolar in boreal conifer forest ecosystems.
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