Agaricus sylvaticus Schaeff. ex Secr., Agaricus silvaticus, Echter Waldchampignon, Agaric des foręts, Psalliote des foręts, Erdei csiperke, fenyőerdei csiperke, Blushing Wood Mushroom Cap 5–10cm across, convex, covered in ochre to brown fibrils breaking up into small adpressed scales. Stem 50–80 x 10–12mm, whitish sometimes with brownish fibrous scales below the dirty brown ring. Flesh white, reddening on cutting when fresh, later turning brownish. Taste and smell not distinctive. Gills pale at first then reddish, later dark brown. Cheilocystidia thin-walled, clavate. Spore print brown. Spores ovoid, 4.5–6 x 3–3.5µ. Habitat coniferous woods. Season summer to autumn. Rare. Edible – good. Distribution, America and Europe.
A. haemorrhoidarius (formerly a subspecies of A. silvaticus) is distinguished by its different habitat; it grows in deciduous woods. Distribution, America and Europe.