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|Noun||1.||true senna - erect shrub having racemes of tawny yellow flowers; the dried leaves are used medicinally as a cathartic; sometimes placed in genus Cassia|
Alexandria senna, Alexandrian senna, Cassia acutifolia, Cassia augustifolia, Indian senna, Senna alexandrina, tinnevelly senna
senna - any of various plants of the genus Senna having pinnately compound leaves and showy usually yellow flowers; many are used medicinally
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