The results of morphological, and some physiochemical analysis of two types of the subtropical medicinal plant Senna (Cassia angustifolia & Cassia obtusifolia) from Omdurman City, Sudan, revealed that the two species are small green shrub about 2 feet high on average. The C obtusifolia pods were curved (Sicklepod) rather than flat, and their seeds seem as sharp projection in the epidermis of the pods, some C obtusifolia pods contain more than 7 seeds, their leaves seem with a sharp top, compared with the rounded top of the C angustifolia leaves. The proximate composition of a mixture of C angustifolia, and C obtusifolia leaves, resulted in 18.88±0.20% crude protein; and 38.40±1.22% carbohydrate. Of minerals detected, the calcium level found as 919.55%. Results had approved the wide range and the high diversity of the different Cassia types in the subtropical region including Sudan and Nigeria.