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

Amaurodon viridis (Alb. & Schwein.) J. Schroet.
no common name

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

Introduction to the Macrofungi

© Adolf Ceska  Email the photographer   (Photo ID #21412)

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Distribution of Amaurodon viridis
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Species Information

Features include 1) resupinate growth on wood, 2) a cobwebby to cottony fruitbody that is dull green to yellowish green, the surface smooth to warted or toothed, often faintly punctate, the margin irregular and almost white, and the subiculum also paler than spore-bearing area, 3) spores that are round to nearly round, verrucose to aculeolate, pale citrine to yellow in water, and usually purple in 2-3% KOH, 4) subicular hyphae that are colorless to slightly citrine (often purple in KOH), with clamp connections, 5) presence of cordons.

Amaurodon viridis has been found in BC, ID, AZ, CA, MO, MN, NY, PA, and VT, (Ginns(5)), and Czechoslovakia, France, Netherlands, Russia, United Kingdom, Tunisia, Australia, and New Zealand, (Larsen).
Fruiting body:
up to 0.03cm thick, separable, arachnoid [cobwebby] to byssoid [cottony], "somewhat pelliculose in mature portions", spore-bearing areas mostly continuous; dull green to yellowish green; "smooth to warted or toothed, often faintly punctate"; sterile margin irregular, paler than the spore-bearing area, "almost white, arachnoid, becoming fibrillose"; subiculum thin, arachnoid, paler than the spore-bearing area, (Larsen)
SPORES 5-6 microns in diameter, round to nearly round, verrucose to aculeolate, pale citrine to yellow in water, usually purple in KOH; BASIDIA 4-spored, 20-35 x 5-7 microns, clavate, with clamp connection at base, sterigmata up to 5 microns long; SUBHYMENIAL HYPHAE 2.5-3.5 microns wide, colorless, thin-walled, with clamp connections; SUBICULAR HYPHAE 2.5-4 microns wide, colorless to slightly citrine (often purple in KOH), thin-walled or with some thickening apparent, with clamp connections; CORDONS 5-30 microns wide, citrine to pale brown, individual hyphae 2-3 microns wide, thin-walled, with clamp connections, (Larsen), spores of Amaurodon species staining violet to dark blue in 2-3% KOH, (Ginns(23))

Habitat / Range

Abies (fir), Acer (maple), Alnus (alder), Fraxinus (ash), Juglans (walnut), Larix (larch), Picea (spruce), Pinus (pine), Platanus (sycamore), Populus, Quercus (oak), (Ginns(5))

Synonyms and Alternate Names

Caldesiella viridis (Alb. & Schwein.) Pat.
Hydnum sudans Alb. & Schwein.
Hypochnus chlorinus Massee
Odontia sudans (Alb. & Schwein.) Bres.
Sistotrema viride Alb. & Schwein.
Tomentella chlorina (Massee) G. Cunn.
Tomentella viridis (Berk.) G. Cunn.

Taxonomic and Nomenclatural Links

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Species References

Larsen, M.J.(9) (as Tomentella chlorina), Ginns(5) (as Tomentella chlorina), Ginns(23)

References for the fungi

General References