Tricholoma flavovirens (Pers. ex Fr.) Lund. syn. Tricholoma equestre (L. ex Fr.) Kummer. Tricolome équestre, Chevalier, Grünling, Sárgászöld pereszke, Agarico equestre, Gele ridderzwam. Cap 5–8cm across, expanded convex, bright yellow often with olive-brown or brown disc and either glabrous or with adpressed scales at centre. Stem 50–100 x 8–12mm, pale yellow with brownish flakes. Flesh whitish yellow. Taste slightly mushroomy, smell slight, not mealy. Gills bright sulphur or lemon yellow. Spore print white. Spores 6–8 x 3–5um. Habitat coniferous woods, less frequently with deciduous trees. Season late summer to autumn. Edible with caution. (Never eat any mushroom until you are certain it is edible as many are poisonous and some are deadly poisonous.) Distribution, America and Europe.