Cassia obova'ta. -- Leaflets, U.S.P. 1830-1860. This was the first senna known, being introduced by the Moors into Europe as early as the 9th century, where even in the 16th it became very largely cultivated. Grows wild on sandy soil in Egypt, Nubia, Abyssinia, Tripoli, Senegal, Arabia, India; cultivated in Jamaica, being called Port Royal or Jamaica Senna; leaves 5-7 pairs, leaflets obovate, obtuse. C. Pubes'cens (C. holoseric'ea), Aden Senna, Abyssinia, rarely met with now; leaflets 2.5 Cm. (1') long, ovate mucronate, hairy, sometimes mixed with Mecca senna. C. brev'ipes, C. America; leaflets resemble Indian senna, but have 3 longitudinal veins; infusion non-purgative.
Cassia obovata: a, legume; b, leaflet, about natural size.