Agaricus semotus Fr. 1863
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Agaricus semotus Fr. 1863
Agaricus semotus Fr. 1863
Biostatus
Recorded in error
New Zealand
Political Region
A. semotus considered a nom. dub. by many authors and usage referred to A. dulcidulus. In the original sense = A. friesianus. NZ material is close to A. campbellensis.[JAC]
Nomenclature
Fr.
Fr.
1863
347
dubious name
ICN
Agaricus semotus Fr. 1863
species
Agaricus semotus
Classification
Vernacular names
Descriptions
Agaricus semotus Fr. 1863
SPECIMENS EXAMINED: NORTH AUCKLAND: Whangarei, Kamo, Pukenui Walkway, NZMS 260 Q07/23-09-, in humus under Kunzea ericoides, PDD 68575.
Pileus 15-40 mm diam., thin, convex when young, finally applanate, centre slightly umbonate, with fawn (3.5YR 5.2/4.0) scales on white (N9.5) background at centre, decreasing towards margin, bruising brownish orange (2.5YR 5/7-6/8); margin inrolled when young, finally straight, edge smooth, with remnants of veil; lamellae insertion free, thin, crowded, of several lengths to alternate, orchraceous salmon (4YR 7.0/7.5) when young, finally umber (7YR 3.7/5.8), edge pale, sterile; trama parallel to irregular. Stipe 20-40 x 4-10 mm, central, fistulose, cylindrical, club-shaped with swollen sometimes twisted base, smooth to silky, white (N9.5) to umber (7YR 3.7/5.8) above annulus, yellow (2.5Y 9/8) below annulus, especially towards base, bruising yellow (2.5Y 9/8-8/8), base with mycelial cords. Annulus pendant, thin, ± ephemeral, white above, yellow below, surface silky. Flesh white, becoming yellow (2.5Y 9/8-8/8) at stipe base upon cutting or bruising; odour of anise; taste sweet. Schaffer's cross-reaction positive.
Basidia 4-spored, 12-20 x 5-7 µm, clavate with sterigmata 3-4 µm. Cheilocystidia 15-29 x 6-8 µm, clavate, abundant, hyaline. Basidiospores dark brown (5YR 3/2) in mass, size (5.7-)6.4(-6.9) x (4.0-)4.5(-4.9) µm, elongation (1.3-)1.5(-1.7) µm, ellipsoid, pale brown in water (2.5YR 4/4), refractive centre (2-3 droplets), apiculus lateral, germ pore not visible.
Basidia 4-spored, 12-20 x 5-7 µm, clavate with sterigmata 3-4 µm. Cheilocystidia 15-29 x 6-8 µm, clavate, abundant, hyaline. Basidiospores dark brown (5YR 3/2) in mass, size (5.7-)6.4(-6.9) x (4.0-)4.5(-4.9) µm, elongation (1.3-)1.5(-1.7) µm, ellipsoid, pale brown in water (2.5YR 4/4), refractive centre (2-3 droplets), apiculus lateral, germ pore not visible.
NEW ZEALAND Northland.
Gregarious.
Taxonomic concepts
Agaricus semotus Fr. 1863
Agaricus semotus Fr. (1863)
Agaricus semotus Fr. 1863
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Metadata
1cb17ccd-36b9-11d5-9548-00d0592d548c
scientific name
Names_Fungi
1 January 2001
19 October 2022