Senna contains a family of hydroxyanthrancene glycosides, the most plentiful of which are sennosides A and B. It is also called Nubian Senna or Alexandrian Senna or even Khartoum Senna. It grows in parts of Sudan and in some Arabian countries. The best senna is distinguished by a bright yellowish-green color of the leaves with a faint odor resembling the smell of green tea and a bittersweet taste.
Senna appears to have been used since the ninth or tenth century, its introduction into medicine being due to the Arabian physicians, who used both the leaves
 and the pods. It was formerly exported through Alexandria, from where the name of the Sudanese drug is derived.
Senna is an FDA-approved non-prescription laxative. It is used to treat constipation and to clear the bowel before diagnostic tests such as colonoscopy. Senna is also used for irritable bowel syndrome (IBS), haemorrhoids, and weight loss, Similarly, both leaves and pods of the plant are used to cure breathing problems.
These 
Types:
Senna Pods
Senna Leaves
 
Packing and Export:
Packing is done in 200 KG pressed bales, and exported in 40 feet containers which will carry 19 metric tons.