Tafasa is the Hausa-language name for Cassia tora, a species of annual leguminous plant in the family Fabaceae. Modern botanical taxonomy has reclassified the plant as Senna tora, though the older name Cassia tora remains dominant in commercial, regulatory, and agricultural literature. A closely related species, Cassia obtusifolia (Senna obtusifolia), is often processed alongside Cassia tora and the two are frequently grouped together under the commercial category cassia seeds.