E-Flora BC: Electronic Atlas of the Flora of British Columbia

Summary:
Features include 1) growth on decaying wood (of black locust), 2) a waxy gelatinous fruitbody that is light grayish white, bruising dark buff, the surface pruinose to granulose, and the margin tightly attached but not easily apparent, 3) allantoid spores, 4) basidia that are longitudinally septate, developing on fertile hyphae that proliferate through the subbasidial clamp connection, and 5) a hymenium that consists of a zone of basidia below a rather distinct layer of dikaryophyses.

The holotype is from BC.

Fruiting body:
effused [spread out flat over the wood], in section 0.008-0.035cm thick, waxy gelatinous; light grayish-white (when soaked), bruising dark buff, fruiting body drying to a light gray to very light buff to almost pure white at margins; surface pruinose to granulose, relatively smooth, drying varnish-like, margins adnate [tightly attached] and indeterminate [not easily apparent], usually lighter than the rest of the surface, and sometimes colorless; surface and margins sometimes glistening, sometimes cracking, (Wells)

Microscopic:
SPORES (13.5)14.5-20(22) x (5.5)6-8(9) microns, cylindric curved to allantoid, guttulate, capable of germinating by repetition; "hymenium consisting of a zone of basidia below a rather distinct layer of dikaryophyses"; PROBASIDIA formed in a zone 30-55 microns wide, (15)16-25(26.5) x 12.5-17(22) microns, "ovate, obovate to clavate, less often ovate or pyriform, at times irregular, with basal clamp, with (2-)4 segments, guttulate", epibasidia up to 50 microns long, 3-5.5(7) microns wide, tubular to flexuous [wavy] or almost nodulose; fertile hyphae 2-5 microns wide, "nodulose to flexuous, forming clusters of basidia by proliferating through or near subbasidial clamp connections", dikaryophyses rather abundant, forming a well-defined layer 18-45 microns tall above the hypobasidia, 1-2 microns wide near apices, 1.5-4 microns wide in basal part, distinct, "usually distinctly short-branched distally, less often with short, nodulose lateral branches, often irregular in diam to nodulose", "apparently originating from the fertile hyphae, with a basal clamp"; SUBHYMENIAL HYPHAE relatively distinct, 2-5 microns wide, colorless, with clamp connections, "becoming slightly thick-walled and devoid of contents adjacent to the substrate"; fruitbody in section "consisting of a basal layer of closely interwoven hyphae becoming ascending in the subhymenial zone, in places erupting through the substrate then ascending to the hymenium, or with basal hyphae parallel to the substrate and ascending to the hymenium, portions of the substrate and other debris, including hyphae and spores of other fungi, often included in the subhymenial zones", (Wells)