The seasonal variation of total ash, acid soluble ash and acid insoluble ash have been investigated leaves , wood and bark of Sesbania rostrata, Sesbania exaltata and Sesbania sesban , which are medicinally important. Comparative account of total ash, acid soluble ash and acid insoluble ash content of bark of Sesbania rostrata showed high level of total ash ( range 7.98 % to 8.70 % ) and low level of total ash of leaves of Sesbania sesban ( range 6.34 % to 6.78 % ) . The acid soluble ash showed higher level of bark of Sesbania rostrata (range 7.45 % to 7.74 %) and lower in wood of Sesbania sesban (range 2.62 % to 2.83 %). Comparative account of acid insoluble ash of bark of Sesbania rostrata showed higher (range 1.91 % to 2.24 %) and lower in the wood of Sesbania sesban (range 0.37 % to 0.58 %).
Key Words: Total ash, acid soluble ash, acid insoluble ash, medicinal plant, Sesbania
