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Teak (shegun) medium to large exotic deciduous tree, Tectona grandis, yeilding a hard, durable, resinous, yellowish-brown wood used for ship building, furniture making etc, first planted in Kaptai (SE) from Myanmar in 1871. The plant is considered as the most valuable timber plant in the country. The leaf blade is about 24 cm wide and 55 cm long with 2-5 cm petiole. The shape of leaf is elliptic to ovate, upperside rough, underside tomentum. Flower is small, white, star-shaped. The fruit is a hard bonny nut in a thick spongy covering having 1-2 seeds inside. The full-grown tree trunk may be 1-2.5 m in diameter at chest height. A narrow belt of vessel cells marks the annual ring. On seasoning, soon darkens in brown mottled with darker streaks. Reddish dye is prepared from young leaves and bark of the roots. Of the total 60,65,000 cft of timber produced annually in Bangladesh, teak occupies a significant proportion. [Mostafa Kamal Pasha]

See also timber tree.