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  Humboldtia unijuga var. unijuga
  Family: FABACEAE/LEGUMINOSAE (Subfam.: Caesalpinioideae)
  Citation:  Humboldtia unijuga Bedd., Fl. Sylv. 183. 1872, var. unijuga; Hook. f., Fl. Brit. India 2: 274. 1876; Gamble, Fl. Pres. Madras 411(291). 1919; Sanjappa, Legumes Ind. 30. 1992; M. Mohanan & Henry, Fl. Thiruvanthapuram 169. 1994; Gopalan & Henry, Endemic Pl. Agasthiyamala 260. 2000; Mohanan & Sivad., Fl. Agasthyamala 233. 2002.
  Malayalam Name(s):
  Tamil name(s):
  English name(s):
  Description: Trees; to 8 m high, branches slender, solid, terete, strigose when young, glabrous and faintly suberose when mature. Leaves bifoliate, alternate; stipule lateral, 5-7 x 2.5 mm narrowly ovate, acute, prominently parallel veined, connate at base, intrapetiolar, glabrous, appendages absent; rachis 5-8 mm long, stout, glabrous; gland at the top; estipellate; leaflets subsessile, 4-15 x 2-5 cm, elliptic-lanceolate or lanceolate or narrowly ovate, base unequal, apex obtusely acuminate, margin entire, glabrous, coriaceous; lateral nerves 5-15, pinnate, looped at the margin forming intramarginal nerve, prominent; intercostae reticulate. Flowers bisexual, 1.5-2.5 cm long, crimson, in axillary as well as cauliflorus racemes; sterile bracts present at the base of racemes; peduncle pubescent; pedicel 5-10 mm long, finely brown pubescent; bracts ciliate, pubescent without; bracteoles 2, 4-5 x 1.5-2 mm, ovate, rounded at apex; calyx tube 8 mm long, obconical lined by the disc, lobes 4, pubescent, obovate, rounded at apex; petals 5, 10-15 mm long, obovate, crimson, narrowed at base, veined, glabrous; stamens 5, free, filaments 10 mm long, filiform; anthers versatile; staminodes absent; ovary 5-6 mm long, half inferior, stipitate, obliquely oblong, densely brown pubescent; style 8-10 mm long, filiform, glabrous, 8-10 mm long; stigma capitate. Fruit a pod 5-8 x 2-3 cm, compressed, oblong, deep red, veined; seeds 2-3.
  Habit: Tree
  Flowering & Fruiting: December-March
  District(s): Thiruvananthapuram
  Habitat: Evergreen forests
  Distribution: Southern Western Ghats
  Aquatic: No
  Epiphyte(s): No
  Saprophyte: No
  Stem parasite: No
  Root parasite: No
  Flower colour(s): Red
  Weed: No
  Monocot/Dicot: Dicotyledonous Plants
  Exotic: No
  Garden: No
  Edible: No
  Vegetable: No
  Endemic to: Southern Western Ghats
  IUCN status: Endangered (EN)
  Altitude: 600-1400
  Localities: Agasthyamala, Agastyarkudam, Boneccord, Athirumala, Base of Agathyamala
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