Tectona L.f., Suppl. Pl. 151. 1782; Clarke in Hook. f., Fl. Brit. Ind. 4: 570. 1885; Moldenke, Ann. Miss. Bot. Gard. 60 (1): 123. 1973; Fl. China @ eFloras.org 17: 16; Fl. Pak. @ eFloras.org p. 20.

Trees, tall, deciduous; bark soft, indumentum stellate. Leaves opposite-decussate or whorled, petiolate to subsessile, large, usually broadly elliptic. Inflorescences terminal panicles, with many dichotomous cymes. Flowers small, bisexual, actinomorphic, hypogynous, bracteate, bracts small, narrow, early deciduous. Calyx campanulate, tube short, limb with 5-7 lobes, lobes spreading, much enlarged or inflated in fruit, persistent. Corolla salverform, white or blue, with short, cylindrical tube; limb with 5-7 lobes, lobes subequal, straight or reflexed. Stamens 5 or 6, inserted on apical part of corolla tube, exserted, equal, anthers bithecous, dehiscing longitudinally. Carpels 2, syncarpous; ovary 4-locular, 1 ovule per loculus; stigma 2-cleft. Fruit drupaceous, completely enclosed in enlarged persistent calyx, rounded or obscurely 4-lobed, endocarp bony, exocarp thin. Seeds erect, oblong, exalbuminous.

3 species

Tectona grandis L.f., Suppl. Pl. 151. 1782; Clarke in Hook. f., Fl. Brit. Ind. 4: 570. 1885; Parker, For. Fl. Punj. ed. 1: 401. 1918 (Reprint 1973); Moldenke, Ann. Miss. Bot. Gard. 60 (1): 123. 1973; Fl. China @ eFloras.org 17: 16; Fl. Pak. @ eFloras.org p. 21; Tectona theka Lour., Fl. Cochinch. 137. 1790; Theka grandis (L. f.) Lam., Tabl. Encycl. 2: 111. 1793.

Deciduous trees, up to 50 m tall. Branches grey to greyish brown, quadrangular, densely stellate-tomentose. Leaves usually opposite-decussate or whorled; petiole robust, 2-4 cm long; leaf blade broadly ovate-elliptic to ovate or obovate, 15-45(-80) cm x 8-23(-40) cm, papery, shining green above, paler tomentose beneath, base cuneate and decurrent, margin entire to repand-dentate, apex acuminate to obtuse, lateral veins 7-12 pairs. Inflorescence terminal or axillary large panicles, 25-40 cm x 30 cm, with few to many opposite branches, branches with many pedunculate dichasial cymes. Flowers small, 6-10 mm across, bisexual, actinomorphic, hypogynous, bracteate, fragrant. Calyx campanulate; tube 2.5-3 mm long, with white stellate hairs; limb 5-7-lobed; much inflated in fruits to 2.5 cm, brittle and dry. Corolla salverform, white; tube 2-3 mm long, cylindrical, outside glandular pubescent; limb 5-7-lobed, lobes subequal, 2.5-3 mm x 2.5-3 mm, obtuse, straight or reflexed. Stamens 5-6(-7), exserted, equal, inserted on corolla tube; filaments ca. 5 mm long; anthers bithecous, 1 mm long, dehiscing longitudinally. Carpels 2, syncarpous; ovary 4-locular, with 1 ovule per loculus, ovary apically hairy; style 3-4 mm long, stellate hairy; stigma ca. 1 mm long, bifid. Fruit drupaceous, globose, 1.2-1.8 mm diameter, obscurely 4-lobed at apex, 4-celled, endocarp bony, surrounded by thick spongy covering, minutely pubescent, completely enclosed within inflated calyx. Seeds erect, oblong.

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