Summary:
Features include 1) resupinate growth on wood, 2) a membranous to pelliculose fruitbody that is cream buff becoming cinnamon buff, occasionally cracked exposing the white subiculum, 3) elliptic spores with a prominent lateral apiculus, smooth, and inamyloid, 4) projecting cystidia that are awl-shaped and often terminated by moniliform swellings or narrow elongated segments, and 5) a subiculum composed of hyphae of varying width, with clamp connections.
Hyphoderma inusitatum is known from the type found in BC (Jackson).
Fruiting body:
"resupinate, widely effused, separable", membranous to pelliculose; cream buff becoming pinkish cinnamon buff; occasionally rimose [cracked] "exposing the white fibrous lower subiculum", (Jackson)
Microscopic:
SPORES 5.5-8 x 3.5-5 microns, elliptic or asymmetrically obovate, "rounded on either side with prominent lateral apiculus", smooth, inamyloid; BASIDIA 4-spored, 20-25 x 5.5-6.5 microns, "clavate, tapering to a narrow base", somewhat flexuous [wavy] in lower part, often subcylindric in upper part, sterigmata 3.5-5 microns long; CYSTIDIA 20-45 x 4.5-5 microns, "arising from the same level as the basidia or slightly below", projecting about one third of their length, subulate [awl-shaped], sometimes flexuous [wavy], "often terminated by one or more moniliform swellings or tipped by one or more narrow elongated segments, which may be shed at maturity", the cystidia "might properly be interpreted as cystidioles and perhaps are in the nature of modified basidia"; SUBHYMENIAL LAYER "of upright, somewhat nodulose hyphae"; SUBICULUM composed of hyphae of varying width (1.5-5 microns wide), longitudinally disposed, with clamp connections "and sometimes slightly enlarged at the septa", (Jackson)
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