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 Agaricus subperonatus
SynonymsPsalliota hortensis f. subperonata
Psalliota subperonata
BiostatusPresent in region - Exotic
Images (click to enlarge)
Owner: J.A. Cooper | 
Caption: Watercolour
Owner: G.M. Taylor | 
Caption: A. subperonatus, Bars = 5 µm | 
Caption: Watercolour
Owner: G.M. Taylor | 
Caption: Watercolour
Owner: G.M. Taylor | 
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 (40-)90(-150) mm diam., very thick,
fleshy, hemispherical when young, finally broadly convex to applanate, surface
smooth to streaky, reddish brown (10R4/4) to brown (2.5YR 4/6) fibrillose scales,
soil particles and humic materials often adhering to surface; margin thick and
inrolled, with remnants of white (N9.5) veil; lamellae insertion free, thick,
crowded of several lengths, sometimes grown together, pink (5R 9/2-8/4) when
young, finally moderate to strong brown (5YR 4/4-3/2), edge pale, sterile; trama
parallel to irregular. Stipe 30-60 x 20-30 mm, central, solid, cylindrical,
swollen sometimes pointed base with mycelial cords, surface fibrillose, white
(N9.5) to buff (10YR 9/2-8/4) above and below annulus. Annulus pendant, white
(N9.5) to buff (10YR 9/2-8/4) above and below, surface smooth. Flesh white (N9.5)
becoming reddish (7.5R 7/4-6/8) upon cutting or bruising; odour and taste pleasant.
Schaffer's cross-reaction negative.
Basidia 4-spored, 19-40 x 6-11 µm, clavate
to broadly clavate, with sterigmata 5-6 µm (very hyaline and difficult to see).
Cheilocystidia 17-45 x 7-15 (20) µm, clavate to broadly clavate, hyaline to
fawn, abundant. Basidiospores dark brown (5YR 3/2) in mass, size (6.9-)8.4(-9.8)
x (5.5-)6.1(-6.7) µm, elongation (1.2-)1.4(-1.6) µm, ellipsoid to subglobose-globose,
pale brown to brown (2.5YR 4/4-5YR 4/4) in water, refractive centre (1-3 droplets),
apiculus lateral, germ-pore not visible.
Habitat: Gregarious or solitary, with hypogean development.
Distribution: NEW ZEALAND Canterbury, North Otago (Taylor
1983).
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