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  Aponogeton natans
 
  Family: APONOGETONACEAE
  Citation:  Aponogeton natans (L.) Engl. & Krause in Engl., Pflanzenreich Aponogetonac. 11. 1906; Gamble, Fl. Pres. Madras 1598(1115). 1931; Mohanan, Fl. Quilon Dist. 436. 1984; Antony, Syst. Stud. Fl. Kottayam Dist. 420. 1989; Babu, Fl. Malappuram Dist. 845. 1990; Joseph, Aquatic Angiosp. Malabar 271. 1991; M. Mohanan & Henry, Fl. Thiruvanthapuram 500. 1994; Sunil & Sivadasan, Fl. Alappuzha Dist. 735. 2009. Saururus natans L., Mant. Pl. 2: 227. 1771. Aponogeton monostachyon L. f., Suppl. Pl. 214. 1781; Hook. f., Fl. Brit. India 6: 564. 1893.
  Malayalam Name(s): Paruakizhangu
  Tamil name(s):
  English name(s):
  Description: Tubers upto 2 cm across, oblong, sometimes globose. Leaves usually floating and rarely submerged. Submerged leaves upto 6 x 1.5 cm, lanceolate, base cuneate, apex obtuse; petiole to 5 cm long. Floating leaves 3-10 x 1-3 cm, oblong, base cordate, apex obtuse or rounded; parallel main nerves 5 or 7; petiole 7-35 cm long. Spikes upto 7 cm long, cylindrical, densely flowered; peduncle upto 40 cm long. Tepals 2, 1.5-2 x 0.5-1 mm, spathulate, pink, 1-nerved. Stamens 6; filaments 2-3 mm long. Ovaries 3, c. 1 mm long, oblong; ovules c. 8; styles to 1.5 mm long. Fruit c. 3 x 2 mm, smooth, beaked. Seeds c. 8, 1.5 -2 mm long, terete; testa double; outer one winged, transparent and reticulately nerved; inner one appressed to embryo.
  Habit: Herb
  Flowering & Fruiting: August-December
  District(s): Kottayam, Alappuzha, Kollam, Thiruvananthapuram, Malappuram, Ernakulam, Kozhikkode
  Medicinal:
  Habitat: Ponds and paddy fields
  Distribution: Indo-Malesia to Australia
  Aquatic: Yes
  Epiphyte(s): No
  Saprophyte: No
  Stem parasite: No
  Root parasite: No
  Flower colour(s): White, Pink, Blue
  Weed: No
  Monocot/Dicot: Monocotyledonous Plants
  Exotic: No
  Garden: No
  Edible: No
  Vegetable: No
  Endemic to:
  IUCN status:
  Altitude:
  Localities: Cherthala
   
 
   
 
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