Agaricus bitorquis (Quél.) Sacc. 1887
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Agaricus bitorquis (Quél.) Sacc. 1887
Agaricus bitorquis (Quél.) Sacc. 1887
Biostatus
Nomenclature
(Quél.) Sacc.
Quél.
Sacc.
1887
998
ICN
species
Agaricus bitorquis
Classification
Vernacular names
Synonyms
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Descriptions
Agaricus bitorquis (Quél.) Sacc. 1887
Pileus (30-)50(-70) mm diam., thick, fleshy, convex when young, finally broadly convex-applanate, surface silky to fibrillose, white (N9.5) when young, bruising orchraceous brown (7.5YR 6/4-4/4), with soil particles often adhering to surface; margin thin, inrolled edge with remnants of veil when young; lamellae insertion free, thin, crowded, pink (5R 8/4) when young, finally moderate brown to dark brown (5YR 4/4-3/2), edge pale and sterile; trama parallel to irregular. Stipe 25-45 x 10-30 mm, central, solid, cylindrical, to widening at centre, base narrowing, surface smooth to fibrillose, white (N9.5) above annulus, browning below annulus (5YR 4/4-3/2). Annulus double: lower brownish (5YR 4/4-3/2), peronate, prominent; upper white (N9.5), pendant, surface fibrillose, indistinct. Flesh slowly becoming reddish brown (5R5/8-2.5YR5/8) on cutting or on bruising; odour and taste pleasant. Schaffer's cross-reaction negative.
Basidia (2-)4-spored, 22-38 x 5-11 µm, clavate with sterigmata 4-8(-10) µm. Cheilocystidia 12-37 x 6-11 µm, broadly clavate, hyaline to fawn, abundant. Basidiospores dark brown in mass, size (6.9-)7.4(-7.9) x (5.5-)6.0(-6.4) µm, elongation (1.1-)1.3(-1.4) µm, ellipsoid, pale brown to brown in water, refractive centre (1-2 droplets), apiculus lateral, germ-pore not visible.
Basidia (2-)4-spored, 22-38 x 5-11 µm, clavate with sterigmata 4-8(-10) µm. Cheilocystidia 12-37 x 6-11 µm, broadly clavate, hyaline to fawn, abundant. Basidiospores dark brown in mass, size (6.9-)7.4(-7.9) x (5.5-)6.0(-6.4) µm, elongation (1.1-)1.3(-1.4) µm, ellipsoid, pale brown to brown in water, refractive centre (1-2 droplets), apiculus lateral, germ-pore not visible.
Gregarious, may be hypogean in lawn or pasture. Good edible quality.
Taxonomic concepts
Agaricus bitorquis (Quél.) Sacc. 1887
Agaricus bitorquis (Quél.) Sacc. (1887)
Agaricus bitorquis (Quél.) Sacc. 1887
Agaricus bitorquis (Quél.) Sacc. (1887)
Agaricus bitorquis (Quél.) Sacc. 1887
Agaricus bitorquis (Quél.) Sacc. (1887)
Agaricus bitorquis (Quél.) Sacc. 1887
Agaricus bitorquis (Quél.) Sacc. (1887)
Agaricus bitorquis (Quél.) Sacc. 1887
Psalliota bitorquis Quél. (1884)
Agaricus bitorquis (Quél.) Sacc. 1887
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1cb17cc1-36b9-11d5-9548-00d0592d548c
scientific name
Names_Fungi
1 January 2000
19 October 2022