TECTONA GRANDIS L. f.

Family: Verbenaceae

Bengali/Vernacular Name: Segun.

Tribal Name: Sakan (Chakma).

English Name: Teak.

Description of the Plant:
A large deciduous tree, with fluted trunk. Leaves opposite, 30-75 cm long, broadly elliptic or obovate, acuminate, cuneate at base, rough. Flowers small, 6 mm across, white in large erect, terminal cymose panicles, 0.3-0.9 m long. Fruit a sub-globose drupe, 1.3 cm diam., the pericarp soft with dense felted stellate hair, endocarp bony.

Using Information:
The wood is laxative, anthelmintic and expectorant; useful in piles, leucoderma and dysentery. Paste of the wood is a local refrigerant and sedative, astringent, hepatic stimulant and diuretic. Powder of wood is said to be allaying skin inflammations. Oily product from wood chips is used in eczema and ringworm. The wood ash is applied on swollen eyelids. The bark and flowers are useful in bronchitis. Oil of nuts used to promote hair growth and also to cure itching of the skin. Flowers and seeds possess diuretic properties. The roots are given in anuria and retention of urine.

Chemical Constituents:
Wood contains a resin, a little essential oil, fatty oil, fatty acids (stearic, palmatic, oleic and linoleic acids) and a quinine-like substance, tectoquinine(2-methylanthra-quinone). It also contains anthraquinones, naphthaquinones, quinones, different fatty acids, squalene, betulic acid, a triterpene (C30H48O5) and other terpenoids, sugars, polyisoprene, caouthouc-like substances occur predominantly in the lumen. Bark contains tannins. The skin-irritant lapachomone and the antioxidant tectol are present in the heartwood, which also yields a yellowish brown oil and 2-methylanthraquinone. Leaves contain a number of quinones including a quinone having the formula, C19H14O6. Seeds contain a fixed oil containing chiefly stearic, palmitic, oleic and linoleic acids (Ghani, 2003). Root contain lapachol, tectol, dehydrotectol, tectoquinone, β-lapachone, dehydro-α-lapachone and β-sitosterol (Rastogi & Mehrotra, 1993).


TECTONA GRANDIS
TECTONA GRANDIS L. f.


Distribution:
Planted throughout the country.


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Retutn from TECTONA GRANDIS to Medicinal Plants: Part T