Notes:
Agaricus arvensis Schaeff. Agaricaceae, Agaricales.
(Horse Mushroom. Шампиньон полевой. Шампиньон обыкновенный.)

Cap: 8-18cm semi-spherical with vertical sides (square head), then convex, broadly convex up to almost flattened; white, yellowish-white, bruising yellow; smooth then slightly scaly or concentric scaly; young cap bottom is covered with white veil, later cap margin sometimes has hanging veil remnants; very old cap brownish-white and rarely with some scales.
Gills: free, very close, narrow then moderately broad or broad when old; color from white or cream-white when covered with veil, then light pink, brownish-pink, purplish-brown up to purplish-black when old.
Veil: partial veil white leaving flaring up to pendant ring or a rim as a thin ring.
Stalk: 6-12cm long, white up to yellowish-white, bruising light yellow then light brown; 1.5-3cm thick, slightly enlarging down, sometimes with indistinct basal bulb; sometimes hollow with edging. Partial veil leaves a ring at upper part of stalk.
Edibility: good.
Habitat: small groups scattered in grass after hard rains along Northern half of Karaganda district (this location is nearby Karaganda city edge).
Season: May – September.

Images

Horse Mushroom_1.jpg
Horse Mushroom_2.jpg
Horse Mushroom_3.jpg

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