Bon (1978) Echinoderma asperum or Lepiota aspera, sometimes known commonly as the freckled dapperling, is a large, brownish, white-gilled mushroom, with a warty or scaly cap.

First described by the eminent nineteenth century mycologist Persoon as Agaricus asper, the freckled dapperling has been through several taxonomical name changes.

[1][2] For a time it was placed with the other "spiny" Lepiota species into a separate sub-genus called Echinoderma, and in 1978 Marcel Bon put it into Cystolepiota.

[4][5][6][7][8][9][10] The species name is the Latin adjective "asper" (with feminine: "aspera" and neuter "asperum"), meaning "rough".

The flesh is white, and is said to smell of rubber, earth balls (Scleroderma citrinum),[3] or the mushroom Lepiota cristata.

[6] Echinoderma asperum appears during autumn in deciduous woodland, or in parks and gardens where wood chip mulch has been used.