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Summary: features include dark brown to red brown, umbonate cap, pallid young gills, whitish stem darkening from base upward, membranous veil that is striate on upper surface, mild odor and taste, woodland habitat, dull brown to dark brown spore deposit, large spores and 2-spored basidia; Breitenbach(4) give Agrocybe brunneola (Fr.) Watling as a synonym of Agrocybe erebia (Fr.) Kuehner, but Watling describes them separately; collections from BC deposited at University of British Columbia, occurs in WA (Andrew Parker, pers. comm.)
Cap: (1.7)2.5-6cm across, convex expanding only slightly when old, nearly always retaining broad umbo, margin wavy; hygrophanous, "cigar brown to date brown when fresh with slight flush of purplish date, becoming clay buff or pale milky coffee on drying"; "slightly viscid, matt when dry, smooth or becoming wrinkled with age", margin striate when old, only sometimes with veil fragments, (Watling), 3-6cm across, "convex-flattened with broad umbo; deep reddish brown to umber when moist, paler dull clay-brown when dry", (Phillips); 3-6cm across, "convex becoming flattened with broad umbo"; dark brown to dark reddish brown; viscid soon dry, bald, (Hermanson)
Flesh: pale snuff brown throughout or darker in stem base, darkening throughout with maturity, (Watling), pale brown (Phillips), brownish (Hermanson)
Gills: uncinate to adnate often with distinct tooth, rather distant, broad; "pale clay buff or milky coffee at first then almost date brown", margin white; margin flocculose, (Watling), "adnate to often decurrent; pallid then deep umber brown", (Phillips) adnate to +/- decurrent, subdistant, broad, interveined; pale brown then rust brown, (Hermanson), attached to slightly decurrent, close to subdistant, often interveined, pale brown becoming dull brown at maturity, (Bessette)
Stem: 2-6cm x 0.35-0.8cm, equal or slightly swollen; "whitish throughout at first, darkening to cigar brown from base upwards with age"; striate in upper part (striations often joining up with gills), silky fibrillose in lower part, (Watling), 6-8cm x 0.6-1.2cm, equal; whitish, then darkening brown from base upward, (Phillips), 3-7cm x 0.3-1cm, equal; pallid near top, dull brown lower down; fibrillose in lower part and pruinose near top, (Hermanson)
Veil: ring membranous, narrow, white, striate above, soon collapsing, (Watling), ring prominent when young but soon torn and easily lost, whitish with striations superiorly, (Phillips), membranous, pallid, thin, tends to collapse, ring sometimes disappears, (Hermanson)
Odor: not distinctive (Watling, Phillips)
Taste: pleasant (Watling), not distinctive (Phillips)
Microscopic spores: spores 9-13(15) x (5)6-7 microns, elongate elliptic in face view, slightly boletoid in side view, ochraceous in water and alkali, germ pore absent; basidia 2-spored, cylindric-clavate, colorless; pleurocystidia few to numerous, lageniform, 50-80 x 12-16 microns, head obtuse ((4)6-9 microns broad), colorless, granular-punctate at apices, cheilocystidia variable, vesiculose to ventricose or even clavate, 30-60 x 8-25 microns, colorless; cap cuticle "a hymeniform layer of balloon-shaped to pyriform cells" 9-15 microns broad; stem cuticle of filamentous hyphae supporting at stem-apex sterile cells similar to cheilocystidia; clamp connections not seen, (Watling), spores 11-15.5 x 5-6.5 microns, elliptic, (Phillips), spores 11-15.5 x 5-6.5 microns, germ pore absent, apex snout-like; basidia 2-spored; pleurocystidia 50-75 x 9-15 microns, narrowly fusoid-ventricose [spindle-shaped - wider in middle], apex obtuse, cheilocystidia 26-35 x 10-16 microns, ventricose and apex broadly rounded, or similar to pleurocystidia, (Hermanson)
Spore deposit: dull brown (Phillips, Bessette), very dark brown (Hermanson), snuff brown (Watling)
Habitat / Range
on soil in damp woods (Phillips), scattered to gregarious "in hardwoods and conifer woods, on bare soil or in leaf litter, edges of forests, forest tracks", summer to fall, (Hermanson), in small groups on edges of woodland tracks, in shrubberies, on shady hedge banks, (Watling for Britain)
Agrocybe brunneola has longer spores, non-striate ring, numerous persistent flecks of veil retained on cap margin even when old and prominent decurrent tooth on gills, (Watling)
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:
2020-06-04 3:02:13 PM
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