Summary: Features include flat growth on wood with the pore surface exposed, the color cream to light buff or pale straw-colored when dry, small angular pores, leathery texture, an associated white saprot, and microscopic characters including small spores. The description is derived from Gilbertson(1).
Microscopic: spores 3.5-4 x 2-2.5 microns, oblong-elliptic to short cylindric, smooth, thin-walled, inamyloid; basidia 4-spored, 9-15 x 3-5 microns, clavate, with basal clamp; cystidia not present although hyphal pegs may occur; hyphal system dimitic or trimitic: generative hyphae 2-3 microns wide, thin-walled, clamped, skeletal hyphae 2-4 microns wide, colorless, thick-walled, also some slightly more branched hyphae of even thickness 1.5-3 microns wide that may be interpreted as binding hyphae
Notes: Antrodiella romellii has been found in BC, WA, OR, ID, AB, AZ, CO, MN, and MT, (Gilbertson).
Habitat and Range
SIMILAR SPECIES
Antrodiella semisupina has some similar features, but has caps, usually grows on hardwoods, and has smaller spores.
Habitat
annual, on dead conifers, also on Populus, causing white saprot, primarily on conifers