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Summary: features include 1) hemispheric fruitbodies growing on birch, 2) color rusty red to reddish brown, turning black, surface with hemispheric perithecial elevations with prominent conic openings, carbonous, interior tissue thin, black, and woody, 3) spores elliptic-inequilateral, brown, unicellular, with straight germ slit less than the full length of the spore; found North Temperate Zone including all states except southern, [presumably then including WA, OR, ID], Canada, Europe, and Asia, "not in tropics except at high altitudes and not in South Temperate Zone", collections examined from North America, Europe (including Belgium, France, United Kingdom), Asia (including India, China), (Miller, J.H.), throughout Asia, Europe, and North America, specimens examined from ID, PA, Germany, Sweden, China Nepal, (Ju(2)), reported from BC (Redhead(5), Callan(1))
Fruiting body: stromata [fruitbodies] 0.5-4cm across and 0.15-0.7cm thick, "peltate, with convex top and constricted base, usually coalescent, with conspicuous perithecial mounds", surface dark brown to blackish brown, "blackish granules immediately beneath surface", wi
Microscopic: SPORE 8.5-12 x 3.5-5 microns, ellipsoid-inequilateral, with narrowly rounded ends, light brown to brown, unicellular, with straight germ slit less than spore-length, perispore dehiscent in 10% KOH, smooth, epispore smooth; ASCUS 150-170 microns total length x 4.5-6 microns, the spore-bearing part 70-82 microns, the stem 75-100 microns long, with apical ring blueing in Melzer's reagent, discoid, 1 micron high and 2 microns broad; PERITHECIUM obovoid, 400-700 microns across and 500-700 microns high; ostiole conic-papillate, (Ju(2)), SPORE 8-12 x 3.5-5 microns, elliptic-navicular or inequilateral, light to dark brown, diagonally uniseriate; ASCUS 60-86 x 5-6.4 microns in spore-bearing part, cylindric, with stem 60-80 microns long; PARAPHYSES copious, "filiform, branched"; PERITHECIUM 800-1000 microns across, hemispheric, (Miller, J.H.)
Habitat / Range
occurs on Betula (birch) throughout Asia, Europe, and North America, seems highly host specific, (Ju(2)), on many woody plants, chiefly Betula, (Miller, J.H.)
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:
2021-04-13 6:45:19 AM
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