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Species Information
Summary: Features include 1) resupinate growth on rotten wood, 2) a thin, waxy, tightly attached fruitbody that is whitish to gray becoming buff, with a pruinose surface, 3) spores that are nearly round, minutely apiculate, and colorless or guttulate, and germinate by repetition, 4) erect fertile hyphae with 2-3 basidia clustered at top and many collapsed basidia sheathing the sides, each new basidium splitting longitudinally into 2 to 4 cells, and 5) gloeocystidia that are subcylindric, colorless to yellow brown, and not emerging.
Basidiodendron eyrei has been found in BC, WA, OR, AB, ON, PQ, AK, AZ, CA, CO, IA, IN, LA, MA, MN, MS, NH, NJ, NY, OH, UT, and VT, (Ginns), Austria, (Luck-Allen), and the United Kingdom (McGuire).
Fruiting body: very thin, in section 0.005- 0.015cm, waxy, closely adnate [tightly attached]; whitish to gull gray becoming pale cinnamon buff, drying cinereous or light pinkish cinnamon to ochraceous-tawny; pruinose, drying to porous-reticulate or continuous; the margins thinning out or farinaceous [mealy], (McGuire), thin, waxy, grayish, (L.S. Olive), somewhat similar to Basidiodendron caesiocinerea but different microscopically (see MICROSCOPIC and SIMILAR), (Luck-Allen), spore deposit white (Buczacki)
Microscopic: SPORES 4-6.5 microns, nearly round, minutely apiculate, colorless or guttulate, germinating by repetition; fertile hyphae 1.5-2.5 microns wide, erect, tortuous, arising almost directly from the wood to the surface, with 2-3 basidia clustered at the apex and a sheath of collapsed basidia down the sides, PROBASIDIA 8-11-13 x 6-8 microns, "at first obovate, finally elongate-urniform", "becoming indistinctly longitudinally septate, 2-4 celled", epibasidia 5-9 microns long, subulate, at first divergent then incurved; GLOEOCYSTIDIA 15-50 x 3.5-7 microns, sinuous, subcylindric, with contents at first colorless, later yellowish brown, often fragmented, reaching the surface only in young fruitbodies and never emerging, (McGuire), SPORES round 5-7 microns in diameter, or nearly round 5-7 x 4-5 microns, smooth, with obscure mucronate apiculus, germinating by repetition or by germ tube, apparently through the apiculate end; PROBASIDIA 7.5-10.5 x 6-7.5 microns, pyriform to obovate, mature basidia 8-14(15) x 6-8 microns, "urniform, elongate, indistinctly longitudinally septate", at first 2-celled to 3-celled, finally 4-celled; GLOEOCYSTIDIA 10-45 x 3-6 microns, (Luck-Allen)
Habitat / Range
on rotten deciduous and conifer wood, (Luck-Allen), Abies sp. (fir), Acer sp. (maple), Arbutus menziesii (Pacific madrone), Betula alleghaniensis (Yellow Birch), Fagus sp. (beech), Fraxinus sp. (ash), Juglans major (Arizona Walnut), Picea sp. (spruce), Picea pungens (Blue Spruce), Pinus sp. (pine), Pinus aristata (Bristlecone Pine), Pinus contorta (Lodgepole Pine), Populus sp., Populus fremontii (Fremont Cottonwood), Populus trichocarpa (Black Cottonwood), Prunus americana (American plum), Quercus sp. (oak), Thuja occidentalis (Northern White-cedar), Ulmus sp. (elm), Phellinus sp. (polypore); associated with a white rot, (Ginns), all year (Buczacki)
Similar Species
Basidiodendron caesiocinerea has round spores that are minutely roughened and provided with definite blunt peg-like apiculi (the apiculus of B. eyrei shows up as a slight hump on the spore), and B. caesiocinerea also has larger more elongate-urniform basidia, and wider gloeocystidia, (from Luck-Allen). B. eyrei is distinguished from B. caesiocinerea by its usually more elongate basidia and its smaller, minutely apiculate spores, (McGuire). Basidiodendron fulvum (at least as Basidiodendron grandinioides) has spores measuring 3 x 2.5-3 microns, that are elliptic, with the shortest axis often through the minute apiculus, (from Luck-Allen). Basidiodendron cinerea has spores 8-11 x 6-8 microns, (from Luck-Allen). Basidiodendron pini has basidia generally more than 20 microns long, and fertile sheaths are not sheathed by involucres of collapsed basidia, (from Luck-Allen). See also SIMILAR section of Basidiodendron caesiocinereum and Basidiodendron cinereum.
