Summary:
Features include 1) resupinate growth on wood and timber, 2) waxy patches that are attached tightly, colored white to cream-ocher, and velvety under 50x lens from cystidia, the margin thinning out or abrupt, 3) spores that are nearly cylindric to nearly elliptic, smooth, inamyloid, and colorless, with droplets or granular contents, 4) basidia narrowly that are clavate and often somewhat constricted, 5) strongly encrusted cystidia that are fusiform and projecting, 6) a monomitic hyphal system, the hyphae with clamp connections.

Microscopic:
SPORES 8-9 x 3.5-4.5 microns, cylindric-elliptic, smooth, inamyloid, colorless, with droplets or granular contents; BASIDIA 4-spored, 25-35 x 7-10 microns, narrowly clavate, suburniform, with basal clamp connection, sometimes also with secondary septa; LAMPROCYSTIDIA common, 80-100 x 10-17 microns, narrowly fusiform, thick-walled, strongly encrusted; gloeocystidia-like LEPTOCYSTIDIA and SPHAEROCYSTS "are found only rarely in certain collections"; HYPHAE monomitic 2.5-5 microns wide, thin-walled to thick-walled, with clamp connections, (Breitenbach), SPORES 7-10 x 3.5-5 microns, subcylindric or narrowly elliptic, smooth, inamyloid, thin-walled, with oily inclusions, site of nucleus often visible; BASIDIA 4-spored, 22-30 x 5-6 microns, "subclavate to clavate, often somewhat constricted", with basal clamp connection; CYSTIDIA of 1 to 3 types: 1) numerous, 60-130(200) x (9)12-18 microns, tapering to an acute apex, "strongly projecting but with time enclosed in the subhymenial layer, starting in the basidial level in the hymenium" and at first thin-walled and naked, "later with much thickened walls and strongly encrusted", 2) in most specimens no other cystidia but in some there are also enclosed, thin-walled gloeocystidia, 30-60 x 7-10 microns, 3) stephanocysts [structure that is typically bicellular with basal cell cup-like and terminal cell spherical] present in cultured media; HYPHAE monomitic 3-4 microns wide, richly branched, thin-walled, with clamp connections at all septa, context often rather loose next to the wood but otherwise "densely united into an almost pseudoparenchymatic structure", especially in the subhymenium "which in mature specimens forms the major part of the section", (Eriksson)

Notes:
Peniophorella pubera has been found in BC, WA, OR, ID, MB, NB, NS, NT, ON, PQ, AL, AZ, CO, DC, FL, IL, KY, LA, MA, MD, MI, MN, MO, MT, NC, NH, NJ, NM, NY, RI, VA, and WI, (Ginns). It has also been found in Switzerland (Breitenbach), and Scandinavia (Eriksson).