Family: Mimosaceae

Bengali/Vernacular Name: Sada Koroi, Sil Koroi; Loha Siris (Sylhet), Jat Koroi (Northern districts).

Tribal Name: Choi, Ghepa (Mogh), Choipang, Chapao (Marma); Khelvi (Garo), Sil Koroi Gaith (Tanchangya).

English Name: White Siris.

Description of the Plant:

A large deciduous tree with tall cylindrical boles and rather small, elongated crown. Leaves abruptly 2-pinnate, pinnae 4-12, leaflets 12-24. Flowers sessile, in numerous small heads. Pods thin flexible, 10-20 cm long, bright orange-brown.

Using Information:

The leaves are insecticidal; made into poultice they are applied to ulcer. Bark-boiled water with table salt is prescribed to expel threadworms; bath with the same is given for scabies. Barks are used in toothache in Khagrachari by the tribal.

EtOH(50%) extract of aerial parts is anticancerous. Root saponin have spermicidal activity against human sperm; also haemolytic in action (Asolkar et al., 1992).

Chemical Constituents:

a-spinasterol, hentriacontane and hexacosanol have been isolated from leaves. Heartwood and bark yield isoflavones biochanin A and formononetin, genistein and diadzein. A new pterocarpan – demethylmedicarpin, biochanin A, formononetin, genistein, daidzein and ß-sitosterol have been isolated from bark. Degraded gum contained galactose, mannose, glucuronic acid and 4-O-methyl-D-glucuronic acid.


A saponin has been isolated from seeds, which on hydrolysis gave proceric acid. Seeds contain procerogenin A, mechaerinic acid, proceric acids, proceranin A, (hypotensive in animals), oleanolic acid and saponin. Root contains a-spinasterol and oleanolic acid (Asolkar et al., 1992; Rastogi & Mehrotra, 1993).


Forests of Chittagong, Chittagong Hill Tracts, Cox's Bazar, Dhaka-Mymensingh, and more or less throughout the country.