Summary:
Antrodia albida is characterized by flat to shelf-like growth on hardwood, white pores that vary from pore-like to gill-like, a white shelving cap that is matted to velvety and becomes zonate, and large spores. The description is derived from Gilbertson(1), except where noted.
It is found in BC, WA, OR, ID, NB, ON, PQ, YT, AK, AL, AR, AZ, CA, CT, DE, FL, GA, IA, IL, IN, KS, KY, LA, MA, MD, ME, MI, MO, MS, MT, NC, NE, NH, NJ, NM, NY, OH, PA, SC, TN, TX, VA, VT, WI, and WV, (Gilbertson).
Cap:
with a cap or flat on wood (with pores exposed) often with part of fruiting body flat and part shelving into a cap, or as numerous narrow imbricate [shingled] caps on a decurrent pore surface, individual caps rarely more than 3cm wide, "as shelf-like structures often elongated to 8cm or more, tough when fresh, slightly harder when dry", margin sharp; upper cap surface white to cream; at first matted and appressed velvety, becoming bald in zones, at first not zonate becoming distinctly zonate, either smooth or slightly grooved
Flesh:
rarely above 0.3cm thick at base, tough; white
Pores:
2-3 per mm, angular, on sloping wood often sinuous and elongated, but sometimes semilamellate [partly gill-like] in some cases, often with all types of fruiting body in one collection; white to cream; tube layer up to 1.5cm thick, colored as pore surface
Microscopic:
spores 10-14 x 3.5-5 microns, cylindric, "often rather variable within the same collection, presumably due to a variable number of sterigmata", inamyloid, colorless; basidia 15-22 x 6-9 microns, clavate, with basal clamp connection; no cystidia or other sterile elements, hyphal system "dimitic, generative hyphae with clamps, in the context and parts of the trama, thin to distinctly thick-walled, 2-5 microns wide, in the subhymenium thin-walled and mostly 2-4 microns wide, skeletal hyphae thick-walled to almost solid, hyaline, unbranched to rarely dichotomously branched, 3-6 microns wide"
Spore Deposit:
white (Buczacki)
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