Senna P. Miller. Subfamily: Caesalpinoideae. clade: Caesalpinoid clade.
A genus of about 295-350 species, trees, shrubs, and herbs, of tropical and warm temperate areas.
ID notes:In the key, "gland" refers to the leafstalk glands, which are located on the petiole or associated with the point of attachment of one or more pairs of leaflets to the leaf rachis.