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 , 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 - Arizona, Mexico, Honduras
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