Senna (cassia angustifolia), also known as wild senna or locust plant is a laxative herb from the leaves and pods of the senna shrub. There are about 50 species of senna for cultivation all over the world. Most of the categories of seena are used to be cultivated in India.
Senna contains anthraquinones, including dianthrone glycosides, sennosides A, B, C and D. Numerous minor sennosides have been identified, and all appear to contribute to the laxative effect. Carbohydrates in the plant include polysaccharides and mucilage consisting of galactose, arabinose, rhamnose, and galacturonic acid. Other constituents in senna include flavonols, chrysophanic acid, salicylic acid, saponin, resin, mannitol, sodium, potassium tartrate and trace amounts of volatile oil.