Dipterocarpus pilosus Roxb.,  Dipterocarpus turbinatus sensu Buch.- Ham.
Family: Dipterocarpaceae

Bengali/vernacular name: Duli-garjan, Sil-garjan, Arjan; Dhuli-garjan (Chittagong).
Tribal name: Jangby (Khumi).
English name:

Description of the plant:
A tall tree. Leaves 10-26 cm long, elliptic, elliptic-oblong or elliptic-lanceolate, acute or abruptly acuminate, coriaceous, upper surface adpressed hairy when young, lower surface pilose and tomentose. Flowers in axillary few flowered racemes; petals 2.5-4.0 cm long, stellate-tomentose without. Fruit-belly subglobose, wings 11-12.5 cm long.

Using information:
Oleo-resin of the bark is used in gonorrhoea, gleet and similar affections of urinary organs (Yusuf et al. 2009).


Chemical constituents:
Plant contains sesquiterpene, γ-gurjunene, oleoresin, a mixture of tetra and pentacyclic sesquiterpenes (18%) containing caryophyllene, its oxide, humulene and triterpene fraction (80%) with dipterocarpol and several related compounds, asiatic acid and its 2-Ac derivetives and 2-α- OH-ursolic acid (Asolkar et al., 1992).

Occurance is restricted in the forests of Chittagong Hill Tracts.