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

Crustoderma resinosum (H.S. Jacks. & Dearden) Gilb.
no common name
Sparassidaceae

Species account author: Ian Gibson.
Extracted from Matchmaker: Mushrooms of the Pacific Northwest.

Introduction to the Macrofungi
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Distribution of Crustoderma resinosum
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Species Information

Summary:
Features include 1) resupinate growth on dead conifer wood, 2) fruitbodies that are membranous to waxy, tightly attached, and cream buff, with the margin abrupt or thinning out, 3) spores that are large, broadly cylindric, smooth, inamyloid, and colorless, 4) cystidia that are large, clavate, encrusted, and thick-walled in their lower part, and 5) a monomitic hyphal system, the hyphae with clamp connections.

Crustoderma resinosum has been found in BC, WA, OR, AB, and MT, (Ginns).
Fruiting body:
widely effused [spread out], 0.02-0.04cm thick, adnate [tightly attached], membranous to ceraceous [waxy]; "warm buff" to "cinnamon-buff", sometimes "light grayish olive"; smooth, but hispid from cystidia under a 30x lens; margin abrupt or thinning out, the same color as the spore-bearing surface or lighter; subiculum white, (Nakasone), widely effused, adnate, ceraceous, 0.04-0.055cm thick in section; cream buff, becoming darker when old; minutely porous to hispid from cystidia, sometimes becoming cracked when old; margin undifferentiated, determinate [clearly marked], thinning out, (Jackson), becoming widely effused; "buff to reddish brown on drying, often resinous", (Gilbertson)
Microscopic:
SPORES 8-12 x 4.5-6 microns, broadly cylindric, smooth, inamyloid, colorless, acyanophilic, thin-walled; BASIDIA 4-spored, 40-80 x 6.5-8 microns, clavate, thin-walled, with basal clamp connection, sterigmata up to 8 microns long; CYSTIDIA "numerous, arising from various depths in subhymenium", 100-280 x 8-16 microns, projecting to 80 microns, clavate, "thin-walled at first, later thick-walled at base then gradually thinning toward apex, with basal clamp", entirely or partially covered with a thin layer of colorless, resinous or crystalline material; HYPHAE monomitic, SUBHYMENIAL HYPHAE 4-6 microns wide, "arranged vertically, dense and compact", "thin-walled, nodose septate", SUBICULAR HYPHAE 4-6 microns wide, thin-walled to moderately thick-walled, "nodose septate, frequently branched", (Nakasone), |SPORES 7-9 x 4.5-5.5 microns, broadly elliptic, "flattened and appearing straight on one side with lateral apiculus", smooth, inamyloid, thin-walled; BASIDIA 4-spored, 30-40 x 6.5-7.5 microns, clavate, sterigmata subulate, slightly arcuate; CYSTIDIA numerous, arising in subhymenium and extruded 3/4 of length, 70-150 x 7.5-12 microns, clavate, apex obtuse, walls thin in upper part but irregularly thickened in lower part, encrusted in upper part with resinous material; SUBICULUM "with a basal layer of interwoven, in part horizontal, hyphae, 3.5-4.5 microns broad with thickened walls, upper layer of more or less erect hyphae with thin walls, all with clamps, a considerable amount of resinous material present", (Jackson), |SPORES 7-9 x 4.5-5.5 microns, broadly elliptic, inamyloid, colorless; CYSTIDIA abundant, clavate, with walls strongly thickened at base, encrusted apically with resinous material; hyphae with clamp connections, (Gilbertson)

Habitat / Range

on dead conifers; associated with a brown rot, (Nakasone), on barkless wood, (Jackson), on dead wood; Picea glauca (White Spruce), P. sitchensis (Sitka Spruce), Pinus contorta (Lodgepole Pine), Pseudotsuga menziesii (Douglas-fir), (Ginns)

Synonyms and Alternate Names

Helotium cyphelloides Redhead
Mycena cyphelloides P.D. Orton

Taxonomic and Nomenclatural Links

Additional Range and Status Information Links

Additional Photo Sources

Related Databases

Species References

Nakasone(1) (colors in quotation marks from Ridgway), Jackson(1) (as Peniophora), Gilbertson(3), Ginns(5)

References for the fungi

General References