Lepiota castanea, commonly known as the chestnut dapperling or petite parasol,[1] is a deadly poisonous,[2] uncommon, gilled mushroom of the genus Lepiota in the order Agaricales.

It is known to contain amatoxins and consuming this fungus can be a potentially lethal proposition.

It can be found in coniferous and deciduous woodlands, mostly singly or in small groups.

The cap is broadly bell shaped to flat, dark red-brown; soon splitting and scaly, up to 3 cm in diameter.

The spores and flesh are white, with a mild taste.