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Summary: Features include fan-shaped whitish hairy caps that are scattered in groups, rows, or fused clusters on hardwood; tough flesh; and well-spaced white gills with edges that appear split or grooved lengthwise. It is found in BC, OR, WA, ID, and also AB, MB, NB, NL, NS, NT, ON, PE, QC, SK, AR, AL, AZ, CA, CT, DC, FL, GA, IA, IL, IN, KS, KY, LA, MA, MD, ME, MI, MN, MO, MS, NC, NH, NY, OH, OK, PA, SC, SD, TN, TX, VA, WV, (Ginns(5)). It is also found in Europe.
Cap: 1-4cm, fan-shaped (or vase-shaped if stem central), margin usually lobed and inrolled in dry weather; white to grayish white, gray, or sometimes brownish gray when wet; dry, densely hairy, (Arora), 0.5-5cm in diameter, up to 0.2cm thick, "generally gregarious, often imbricate, effused-reflexed to laterally stipitate", margin wavy, lobed or incised; whitish to gray or gray-brown; matted-tomentose, mealy, or hirsute, (Ginns(4))
Flesh: tough, leathery, thin; "pallid or grayish", (Arora)
Gills: radiating from point of attachment, well-spaced; "white to grayish; edges appearing split or grooved lengthwise (i.e., cuplike in cross section), rolling back in dry weather", (Arora), split, brittle, waxy; pale tan; smooth, (Ginns(4))
Stem: absent or present only as narrowed basal point of attachment, (Arora), up to 0.7cm long and 0.3cm wide, generally round in cross-section, (Ginns(4))
Odor: pleasant (Phillips), sourish, like Heterobasidion annosum, mild, (Breitenbach)
Taste: pleasant (Phillips), sourish, like Heterobasidion annosum, mild, (Breitenbach)
Microscopic spores: spores 3-4(6) x 1-1.5(3) microns, cylindric, smooth, (Arora), spores 6-8(9) x 2-2.4(2.8) microns, cylindric with broadly rounded ends in face view, adaxially flattened to slightly concave or basally bent in side view, smooth, thin-walled, inamyloid; basidia 4-spored, 20-25 x 4-6 microns, narrowly clavate, (Ginns(4)), pleurocystidia and cheilocystidia not seen; basidia with clamps, some septa in cap cuticle with clamps, (Breitenbach)
Spore deposit: white (Arora)
Habitat / Range
scattered "or in groups, rows, or fused clusters on hardwood sticks, stumps, logs, etc.", (Arora), on wood of a broad range of species, (Ginns(4)), spring, summer, fall, and even warm spells in winter, (Miller)
Recommended citation: Author, Date. Page title. In Klinkenberg, Brian. (Editor) 2020. E-Flora BC:
Electronic Atlas of the Plants of British Columbia [eflora.bc.ca]. Lab for
Advanced Spatial Analysis, Department of Geography, University of British
Columbia, Vancouver. [Accessed:
2020-11-27 3:56:15 AM
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