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Species Information
Summary: Features include 1) resupinate growth on wood, 2) fruitbodies that are pale ochraceous or yellowish cinnamon to saffron (generally brightly colored), the surface waxy and smooth, 3) spores that are narrowly elliptic to subcylindric, inamyloid, and cyanophilic, 4) cystidia that are projecting, cylindric, moderately thickened at base, and often septate, and 5) a monomitic hyphal system, the hyphae dense, vertical, and agglutinated.
Crustoderma dryinum has been found in BC, WA, OR, ID, ON, PQ, AK, AL, AZ, CO, MD, MO, MS, NM, VA, and WI, (Ginns), and Sweden and Finland, (Eriksson).
Fruiting body: resupinate, widely effused, moderately thick, 0.1-0.2 mm [sic], closely attached, ceraceous [waxy], drying membranaceous to crustaceous; pale ochraceous, yellowish cinnamon to saffron; smooth, velvety under 50x lens; margin abrupt and undifferentiated, or narrow and finely fibrillose (50x lens), (Eriksson), resupinate, thick, 0.05-0.1cm thick in section, firmly attached; drying snuff-brown; even, velvety, (Burt)
Microscopic: SPORES 7-8(9) x 2.5-3.5 microns, narrowly elliptic to subcylindric, rarely narrowly obovate or adaxially slightly concave, illustrated smooth, inamyloid, cyanophilic, with thin or slightly thickened walls; BASIDIA normally 4-spored, 24-30 x 5-6 microns, narrowly clavate to subcylindric, when old somewhat thick-walled; CYSTIDIA numerous, 80-120 x 5-7 microns, projecting 40-60 microns, cylindric or apically tapering, rarely somewhat clavate, walls basally thick, tapering apically, basal clamp connection present, usually 1-3 adventitious septa, apical protoplasm denser and in phase contrast refractive; HYPHAE monomitic: hyphae 2-4 microns wide, "yellowish, the basal hyphae somewhat thickwalled, in the subhymenium mostly thinwalled, richly branched and provided with clamps", most of the fruitbody consists of dense vertically oriented agglutinated hyphae, making clamp connections difficult to observe, (Eriksson), SPORES 8-12 x 3-4 microns, cylindric to cylindric-elliptic, inamyloid, colorless; BASIDIA 25-35 x 5-6 microns; CYSTIDIA abundant, up to 160 microns long, 6-10 microns wide, cylindric, thin-walled to slightly thick-walled, not encrusted; hyphae with clamp connections, (Gilbertson), slightly thick-walled cystidioles with adventitious septa were observed, (Nakasone)
Habitat / Range
on decaying wood and bark of logs, dead trees and limbs, mine timbers; Abies (fir), Acer (maple), Picea (spruce), Pinus (pine), Populus tremuloides (aspen), Pseudotsuga (Douglas-fir), Quercus (oak), Tsuga (hemlock); associated with a brown rot, (Ginns), on conifer wood, (Eriksson)
Similar Species
Crustoderma resinosum has broadly elliptic spores measuring 7-9 x 4.5-5.5 microns, and cystidia with walls strongly thickened at the base (as opposed to moderately thickened at the base), (Gilbertson). Crustoderma testatum has dendrohyphidia and two types of cystidia. Crustoderma longicystidiatum is very rare and has wider spores.
