Summary:
Features include 1) resupinate growth on conifer wood, 2) cream to buff or bright yellow fruitbodies with hairs, 3) spores measuring 7.5-9.5 x 3.5-5 microns that are elliptic to broadly fusiform or navicular, 4) 4-6-spored basidia that are subcylindric to suburniform, 5) abundant cystidia that are cylindric to subfusiform, smooth, and thin-walled, and 6) wide subicular hyphae with right angle branching, the walls up to 2.5 microns thick, with clamp connections.
Botryobasidium ansosum has been found in BC, WA, AZ, CA, and NM, (Ginns).
Fruiting body:
becoming widely effused; cream to bright yellow; pilose [with hairs], (Gilbertson), cream to bright yellow, (Martin), hypochnoid, continuous; buff, (Julich)
Microscopic:
SPORES 7.5-9.5 x 3.5-4.5 microns, elliptic to broadly fusiform, inamyloid, colorless, illustrated as smooth with obvious apiculus; BASIDIA 4-6-spored, 8-10 microns wide, usually with slight median constriction; CYSTIDIA abundant, 50-110 x 6-10 microns, cylindric, thin-walled, non-septate; SUBICULAR HYPHAE 5-8 microns wide, with conspicuous right angle branching, thin-walled, nodose-septate, (Gilbertson), SPORES 7.5-9 x 3.5-4 microns, elliptic to broadly fusiform; CYSTIDIA abundant, cylindric, thin-walled; hyphae with clamp connections, (Martin), SPORES 8-9 x 4-5 microns, navicular to broadly fusiform; BASIDIA (4)6-spored, 17-29 x 8-10 microns, subcylindric to suburniform; CYSTIDIA 55-120 x 8-12.5 microns, cylindric to subfusiform, colorless, smooth, thin-walled to slightly thick-walled; HYPHAE 7-15 microns wide, the basal ones with thickened walls (up to 2.5 microns), according to key lead with clamp connections, "at least sub-basidial and at the basal hyphae", (Julich)
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