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  Tectona grandis
  Citation:  Tectona grandis L. f., Suppl. Pl. 151. 1781; Hook. f., Fl. Brit. India 4: 570. 1885; Gamble, Fl. Pres. Madras 1092(765). 1924; Manilal & Sivar., Fl. Calicut 231. 1982; Mohanan, Fl. Quilon Dist. 317. 1984; Ansari, Fl. Kasaragod Div. 298. 1985; Ramach. & V.J. Nair, Fl. Cannanore Dist. 358. 1988; Babu, Fl. Malappuram Dist. 622. 1990; Vajr., Fl. Palghat Dist. 369. 1990; M. Mohanan & Henry, Fl. Thiruvanthapuram 361. 1994; Subram., Fl. Thenmala Div. 280. 1995; Sasidh. & Sivar., Fl. Pl. Thrissur For. 354. 1996; Sasidh., Fl. Shenduruny WLS 244. 1997; Sivar. & Mathew, Fl. Nilambur 537. 1997; Sasidh., Fl. Periyar Tiger Reserve 312. 1998; Sasidh., Fl. Chinnar WLS 244. 1999; Sasidh., Fl. Parambikulam WLS 243. 2002; Rajendran & Daniel, Indian Verbenaceae 320. 2002; Anil Kumar et al., Fl. Pathanamthitta 395. 2005; Sunil & Sivadasan, Fl. Alappuzha Dist. 567. 2009; Ratheesh Narayanan, Fl. Stud. Wayanad Dist. 644. 2009.
  Malayalam Name(s): Thekku
  Tamil name(s):
  English name(s): Teak, Indian-Oak
  Description: Deciduous trees, to 30 m high, bark 10-20 mm thick, yellowish-brown, rough, shallowly vertically fissured, fibrous; bole often fluted at base; branchlets 5-10 mm thick, 4-angled, puberulous. Leaves simple, opposite, 30-60 x 15-30 cm, ovate, obovate, apex acute or obtuse, base attenuate, margin entire, wavy, glabrous above and pubescent below with minute red glands, coriaceous; petiole 10-50 mm long, stout, tomentose; lateral nerves 8-10 pairs, pinnate, prominent, raised beneath, puberulent beneath; intercostae scalariform, prominent. Flowers bisexual, white, 7 mm across, in terminal cymose panicles, 10-30 cm across, puberulous. Calyx 5 mm long, campanulate, lobes 5-6, subequal, ovate, tomentose. Corolla 6 mm long, lobes 5-6, oblong, spreading. Stamens 5-6, equal, erect, inserted at the throat, exserted; filaments 3 mm; anthers oblong. Ovary globose, superior, densely hairy, 4-celled, 1 ovule in each cell; style slender, 4 mm; stigma linearly bifid. Fruit a drupe, 1.5-2 cm across, globose, brown, densely floccose hairy, covered by the inflated calyx, epicarp spongy, endocarp stony; seeds 1-4, oblong.
  Habit: Tree
  Flowering & Fruiting: May-January
  District(s): All Districts
  Medicinal: Yes
  Habitat: Moist deciduous forests, also raised in plantations
  Distribution: South and South East Asia
  Aquatic: No
  Epiphyte(s): No
  Saprophyte: No
  Stem parasite: No
  Root parasite: No
  Flower colour(s): White, Creamy
  Weed: No
  Monocot/Dicot: Dicotyledonous Plants
  Exotic: No
  Garden: No
  Edible: No
  Vegetable: No
  Endemic to:
  IUCN status:
  Localities: Kattalappara, Chinnar, Karadikkavala, Anappadi, Kalleli, Taliparamba, Bekal, Silent Valley R. F., Vandanam, Canoli, Vandalodu
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