Summary:
Features include 1) resupinate growth on wood and occasionally on polypores or other substrates, 2) a mould-like, sometimes floccose fruitbody colored wood brown to vinaceous brown, the surface smooth, the margin paler and villose, and the subiculum firm and colored as spore-bearing area or darker, 3) spores that are irregular to strongly lobed, frequently appearing slightly elongated along one axis, echinulate, and brown, 4) basidia often with transverse septa, the sterigmata often with septa, 5) subhymenial hyphae that are colorless to pale brown, with clamp connections, the hyphae often appearing torose, 6) subicular hyphae that are brown, with clamp connections frequent, becoming thick-walled, often swollen and ampullate at the septa and appearing torose.

Microscopic:
SPORES 7.5-10(11) microns in diameter, irregular to strongly lobed, frequently appearing elongated along one axis, "echinulate, medium to dark brown"; BASIDIA 4-spored, 50-65 x 7-12 microns, with clamp connection at base, transverse septa often present, sterigmata up to 8 microns long and often with septa; SUBHYMENIAL HYPHAE 4-7(11) microns wide, colorless to pale brown, "some wall thickening noticeable to becoming thick-walled", with clamp connections, hyphae often appearing torose; SUBICULAR HYPHAE 4-6.5(8) microns wide, "dark brown to dull pale-brown", septate, with clamp connections frequent, becoming thick-walled, often swollen and ampullate at the septa and appearing torose, (Larsen, M.J.(9))

Notes:
Tomentella sublilacina has been found in BC, WA, OR, ID, NF, NS, ON, PQ, AZ, KY, MA, MD, MI, MN, NC, NM, NY, TN, and WV, (Ginns). Distribution also includes Jamaica, Austria, Czechoslovakia, Denmark, France, Finland, Germany, Hungary, Netherlands, Sweden, United Kingdom, and New Zealand, (Larsen, M.J.(9)).