Agaricus impudicus: The Ultimate Mushroom Guide
About The Agaricus impudicus Mushroom
Agaricus impudicus is a species of Fungi in the family Agaricaceae. Gills are free, color progresses with age from pale pink to a chocolate color, and spores are dark brown. The stipe has a clear annulus (ring). Cap is brownish due to numerous brownish scales on a white background. The stipe is white, cylindrical, and wider towards the bottom, or ending in a bulb.
Unlike many other of the 'woodland' Agaricus it does not change color in the flesh when damaged. There are differing opinions on whether the gills change color, with some authors stating they turn dark red when damaged.
Known to occur in Western and Southern Europe and New Zealand, this uncommon mushroom is found in deciduous or coniferous forests in autumn.
Other names: Tufted Wood Mushroom.
Agaricus impudicus Identification
5 to 10cm across; initially convex, often becoming flat-topped as it expands; large scales usually in various shades of dark brown on a pale brown background; whitish flesh either slowly turning very slightly red or unchanging when cut.
Free; crowded; greyish pink, turning brown with age.
6 to 10 cm long and 0.8 to 1.2 cm dia., with a slightly bulbous base; white pendulous ring; surface smooth and white, turning brown with age.
Ellipsoidal to ovoid, smooth, 4-6.7 x 3.7-4.5µm.
Odor and Taste
Odor strong, unpleasant, reminiscent of radish; taste earthy-mushroomy, unpleasant.
Habitat & Ecological Role
Saprobic, usually in groups in conifer forests and mixed woodland.
Agaricus impudicus Look-Alikes
Very similar, with grey-brown scales and a stouter stem; it occurs under broad-leaved trees, notably oak and beech.
Larger and smells of bitter almonds.
Agricus langei and Agaricus silvaticus
Both turn red in the flesh when damaged, which the A. impudicus mushroom does not.
Agaricus impudicus Taxonomy & Etymology
First described in 1932 by the British mycologist Carleton Rea (1861 - 1946), one of the founders of the British Mycological Society, who gave this species the binomial scientific name Psalliota impudica, this saprobic woodland mushroom was transferred to the genus Agaricus in 1951 by Czech mycologist Albert Pilát (1903 - 1974), whereupon it acquired its currently-accepted scientific name Agaricus impudicus.
Synonyms of Agaricus impudicus include Psalliota impudica Rea, Psalliota variegata F.H. Møller, Agaricus variegatus (F.H. Møller) Pilát, Agaricus variegans F.H. Møller, Psalliota variegata var. koelerionis Bon, and Agaricus koelerionensis (Bon) Bon.
The specific epithet impudicus is Latin for 'shameless' or 'immodest'.
Agaricus impudicus profile
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