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Species Information
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.
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).
Fruiting body: resupinate, thin, membranous, soft, wax-like patches several centimeters across, attached tightly; white to cream-ocherish; dull, smooth; margin diffuse, (Breitenbach), resupinate, up to 0.03cm thick, ceraceous [waxy], adnate [tightly attached]; at first whitish, when mature "argillaceous, ochraceous, or isabellinous"; under 50 x lens velvety from numerous projecting cystidia, "porose when young and dry, then totally continuous; margin mostly thinning out, in other cases abrupt or in some fruitbodies finely fibrillose under the lens (50 x)", (Eriksson), spore deposit white (Buczacki)
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)
Habitat / Range
on dead wood of hardwoods, according to the literature more rarely also on conifer wood; summer-fall, (Breitenbach), on decayed, barkless wood of hardwoods or less often on bark, sometimes on conifers, (Eriksson), Abies (fir), Acer (maple), Alnus (alder), Arbutus (madrone), Betula (birch), Juglans cinerea (Butternut), Picea (spruce), Pinus (pine), Populus tremuloides (Quaking Aspen), Quercus (oak), Salix (willow), Thuja plicata (Western Red-cedar); bark; dead wood; "logs and limbs; test stakes; house sills; shingles", poles; associated with a white rot, (Ginns), spring, summer, fall, (Buczacki)
Similar Species
Hyphoderma species have different cystidia and lack the dense Phlebia-like context that gives the fruitbodies a waxy consistency and makes them more Phlebia-like in outward appearance, (Eriksson). In Phlebia species, "the basidia are cylindric-clavate and not suburniform", (Breitenbach).
