Chamaecrista absus

Chamaecrista absus (syn. Cassia absus), the pig's senna or tropical sensitive pea, is a species of flowering plant in the family Fabaceae, with a worldwide distribution in the tropics and subtropics. An annual herb reaching 60 cm, it is a common weed of cultivated and waste places, and its seeds are regularly harvested and sold for use in traditional medicine in Africa and Asia.

Subtaxa
The following varieties are accepted:
 * Chamaecrista absus var. absus – entire range
 * Chamaecrista absus var. meonandra (H.S.Irwin & Barneby) H.S.Irwin & Barneby - Arizona, Mexico, Honduras