Herissantia crispa is a species of flowering plant in the mallow family known by the common names bladdermallow and curly abutilon.

This is a perennial or sometimes annual herb growing up to about 1.5 meters in maximum stem length, usually taking a trailing or creeping form.

The inflorescence is a solitary flower emerging from a leaf axil, borne on a long-haired pedicel which is half erect and then jointed downward.

The flower has five pale yellow oval petals each up to a centimeter long.

It is up to 2 centimeters wide, coated in long hairs, and dehiscent, each segment containing 2 or 3 black kidney-shaped seeds.