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Summary: features include slimy, dark olive-gray-brown cap, white gills, long slender slimy white stem, and large spores; description derived from Hesler(1) except where noted; Hesler(1) examined collections from WA, OR, CA; there is a collection from BC at the University of British Columbia
Cap: 2-5cm across, at first broadly bell-shaped with mammillate umbo and incurved margin, becoming flat; 'surface beneath "buffy olive" with the umbo "clove brown," margin slightly paler'; glutinous from colorless veil, bald, "the surface often uneven from the drying gluten", margin membranous, (Hesler), dark olive-gray-brown, becoming paler at the margin, (Stuntz)
Flesh: thin; white, unchanging; in stem white
Gills: adnate with a tooth becoming subdecurrent, close to subdistant, 0.3-0.4cm broad, thickish, waxy, a few forked; pure white
Stem: (4)5-10cm x 0.3-0.6(0.8)cm, equal or slight ventricose [wider in middle] and narrowed at base; whitish, when old tinted like cap from the drying veil; covered at first with the colorless glutinous sheath, (Hesler), lacking a sheath of fibrils beneath the slime sheath (Stuntz)
Veil: colorless glutinous veil on cap and lower stem
Microscopic spores: spores (10)12-18(20) x 7-9 microns, elliptic, smooth, inamyloid; basidia 4-spored, 55-71 x 7-12 microns; pleurocystidia and cheilocystidia absent; gill tissue divergent; clamp connections present on cuticular hyphae
Spore deposit: [presumably white]
Habitat / Range
scattered to single or rarely subcespitose [nearly tufted] on humus or mossy areas, in dense coniferous forests
Hygrophorus fuscoalbus has shorter, thicker stem, woolly white fibrils under slime sheath, and smaller spores, (Stuntz); Hygrophorus olivaceoalbus var. gracilis similar but Hygrophorus megasporus lacks dark fibrils beneath stem slime, has a bald cap, and has much larger spores, (Hesler)
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:
2020-07-11 11:44:58 AM
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