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 Agaricus cupreobrunneus
SynonymsPsalliota cupreobrunnea
Psalliota campestris var. cupreobrunnea
BiostatusPresent in region - Exotic
Images (click to enlarge)
Caption: A, A. cupreobrunneus, Bars = 5 µm. | 
Caption: fruitbody
Owner: J.A. Cooper | 
Owner: J.A. Cooper | 
Caption: fruitbody
Owner: J.A. Cooper | 
Owner: J.A. Cooper | 
Caption: spores and cheilocystidia
Owner: J.A. Cooper | 
Owner: J.A. Cooper | 
Caption: cheilocystidium and spores.
Owner: J.A. Cooper | 
Owner: J.A. Cooper | 
Owner: J.A. Cooper | 
Owner: J.A. Cooper |
Article: Mitchell, A.D.; Walter, M. (1999). Species of Agaricus occurring in New Zealand. New Zealand Journal of Botany 37(4): 715-725 (http://www.rsnz.org/publish/abstracts.php).
Description: Pileus 30-70 mm diam., medium in thickness,
convex when young, finally broadly convex to applanate, with copper brown to
dark brown ( 10YR 5/6-4/4) scales at centre, decreasing towards margin, pale
brown (5YR 6/4-5/6) to reddish (7.5R 5/8-5R 5/10) on bruising; margin inrolled
when young, finally inrolled to straight, often with remnants of veil; lamellae
insertion free, thin, crowded, pink (5R 9/2) when young, finally dark brown
(5YR 3/2); edge concolorous, fertile; trama parallel to irregular. Stipe 20-40
x 8-15 mm, central, solid to fistulose, cylindrical, narrowing towards the base,
white (N9.5) to cream-buff (2.5Y 9/2 to 5Y 9/1) above annulus, surface smooth,
brownish (5YR 6/4-5/4) below annulus, surface floccose, browning (5YR 6/ 4-5/4)
when bruised. Annulus pendant, broad, brown above, white (N9.5) below, surface
streaked. Flesh white (N9.5), pale brown slowly becoming reddish (5R 6/6-6/8)
upon cutting or bruising; odour and taste pleasant. Schaffer's cross-reaction
negative.
Basidia 4-spored, 15-34 x 10-11 µm, clavate
to broadly clavate, with sterigmata 3-5 µm. Basidiospores brown (5YR 4/4) in
mass, size (7.2-)8.3(-9.4) x (4.9-)5.6(-6.3) µm, elongation (1.3-)1.5(-l.7)
µm, pale brown to brown (2.5YR 4/4-5YR 4/4) in water, refractive centre (1-2
droplets), apiculus lateral, germ-pore not visible.
Habitat: Gregarious or solitary, often in rings, lawn
or pasture. Good edible quality.
Distribution: NEW ZEALAND Canterbury.
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