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Species Information
Summary: Features include a pallid cap with a light cinnamon brown center, almost distant gills, a white stem, growth in clumps, and (microscopically) long pileocystidia in combination with the spore-shape (spores have obconic base). Coprinellus hiascens was in Section Setulosi (with pileocystidia on cap best seen just before opening) of Coprinus sensu lato, along with Coprinellus congregatus, Coprinellus disseminatus, Coprinellus ephemerus, and Coprinellus impatiens, according to Moser. There are probably others in this section which has not been fully studied in the Pacific Northwest. Coprinellus hiascens is the more recently published name based on molecular evidence (Redhead(49)). The description derived from Moser is Coprinus hiascens (Bull. ex Fr.) Fr.
Coprinellus hiascens has been reported to occur at least in BC by Paul Kroeger (collection at the University of British Columbia).
Cap: up to about 4cm across when expanded, up to 1.5-1.2cm when closed, only rarely entirely flattened; usually ocher brown at center, paler toward margin, (Ulje), 1-2.5cm high, disc light cinnamon-brown, otherwise pallid, (Moser)
Gills: narrowly adnate, 24-36 reaching stem, 1-3 subgills between neighboring gills; white to blackish, (Ulje), almost distant; deliquescing slowly [according to that part of key]
Stem: 4.0-10.0 x 0.1-0.3(0.4)cm, base slightly club-shaped and up to 0.5cm wide; grayish-white; pubescent, (Ulje), 4-5cm x 0.1-0.3cm, white, (Moser)
Veil: veil present, visible as small, whitish, radially fibrillose flocks [floccules] on cap, (Ulje)
Odor: indistinct (Buczacki)
Taste: indistinct (Buczacki)
Microscopic spores: spores 7.5-11.5 x 4.3-5.9 microns, oval to elliptic, obconical at base, truncate, germ pore central, about 1.8 microns wide; basidia 4-spored, 14-38 x 7-8 microns; pseudoparaphyses 3-5 per basidium; pleurocystidia absent, cheilocystidia 30-50 (75) x 10-18 microns, lageniform with tapering neck 3.5-7 microns wide; pileocystidia slender, 50-200 (250) x 13-24 microns, lageniform, with tapering neck 4-10 microns wide; sclerocystidia absent; veil on cap consisting of cylindric or somewhat inflated hyphae, with terminal cells 2-15 microns wide, (Ulje), spores 8-12 x 4.5-5.8 microns; cheilocystidia usually more or less bottle-shaped [according to that part of key]; pileocystidia long 120-140 / 16-20 / 6-7.5 microns, (Moser), cheilocystidia subglobose (Hansen)
Spore deposit: dark brown (Buczacki)
Habitat / Range
gregarious and fasciculate [bundled], usually in bundles of more than ten; on naked soil or grassy places, (Ulje), usually in clumps, not on dung, (Moser), on open land (Hansen), spring, summer, fall, (Buczacki)
Similar Species
Fruitbodies of Coprinellus disseminatus are usually smaller, and larger in number, spores are slightly smaller, pileocystidia have a broad, cylindrical, not tapering neck, and velar spherocysts are present on the cap (cylindrical veil elements lacking on the cap), (Ulje). Coprinellus impatiens has pileocystidia not over 90 microns long, (Moser).
