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  Pterospermum rubiginosum
 
  Family: STERCULIACEAE
  Citation:  Pterospermum rubiginosum Heyne ex Wight & Arn., Prodr. 68. 1834; Hook. f., Fl. Brit. India 1: 368. 1874; Gamble, Fl. Pres. Madras 109(78). 1915; Mohanan, Fl. Quilon Dist. 94. 1984; Vajr., Fl. Palghat Dist. 90. 1990; Chandra in B.D. Sharma & Sanjappa, Fl. India 3: 451. 1993; Sasidh. & Sivar., Fl. Pl. Thrissur For. 69. 1996; Sasidh., Fl. Shenduruny WLS 43. 1997; Sasidh., Fl. Periyar Tiger Reserve 37. 1998; Sasidh., Fl. Parambikulam WLS 34. 2002; Mohanan & Sivad., Fl. Agasthyamala 110. 2002; V. Chithra in P. Daniel, Fl. Kerala 1: 467. 2005; Ratheesh Narayanan, Fl. Stud. Wayanad Dist. 165. 2009.
  Malayalam Name(s): Chittilaplavu, Ellooti, Malamthodali
  Tamil name(s):
  English name(s):
  Description: Evergreen trees, to 20 m high, bark 5-6 mm thick, brown, flaking off in thin rectangular strips; branchlets tawny pubescent; branches drooping. Leaves simple, alternate, 4-8.5 x 2-3 cm, ovate or ovate-lanceolate or elliptic-ovate, apex acuminate, base oblique, margin entire, glabrous above and densely white tomentose beneath, coriaceous; 3-5-ribbed from base, palmate, lateral nerves 4-6 pairs, pinnate, prominent, intercostae scalariform, slender, prominent; petiole 4-6 mm long, stout, pubescent; stipules lateral, filiform, oblique, densely pubescent, cauducous. Flowers bisexual, white, solitary, axillary. Calyx tubular, cylindric, brown-hoary outside, splitting into 5 linear lobes, white silky within. Petals 5, white, linear-oblong, slightly smaller than sepals. Staminal column adnate to the gynophore, bearing 5 groups of 3 stamens each between the staminodes, minutely tubercled towards tip. Ovary superior, cylindric, ridged, tomentose, within the apex of the column, 5-celled, ovules many in each cell; style hairy at base; stigma simple. Fruit a capsule, 40-50 x 6-9 mm, subclavate, acutely 5-angled, brown; seeds winged at one end.
  Habit: Tree
  Flowering & Fruiting: November-April
  District(s): Palakkad, Kollam, Idukki, Thiruvananthapuram, Thrissur, Wayanad, Kozhikkode, Kannur
  Medicinal: Yes
  Habitat: Evergreen and semi-evergreen forests
  Distribution: Southern Western Ghats
  Aquatic: No
  Epiphyte(s): No
  Saprophyte: No
  Stem parasite: No
  Root parasite: No
  Flower colour(s): White
  Weed: No
  Monocot/Dicot: Dicotyledonous Plants
  Exotic: No
  Garden: No
  Edible: No
  Vegetable: No
  Endemic to: Southern Western Ghats
  IUCN status:
  Altitude: 500-700
  Localities: Chimmini, Kallar, Koruthode, Nadugani ghats, Kothala, Mukkali forests, Karamanayar region
   
 
   
 
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