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  Alternanthera philoxeroides
 
  Family: AMARANTHACEAE
  Citation:  Alternanthera philoxeroides (Mart.) Grisb., Wiss. Gnett. 24: 36. 1879; Joseph, Aquatic Angiosp. Malabar 47. 1991; Madhus. & Ajit, Journ. Econ. Tax. Bot. 17: 652. 1993; Sunil & Sivadasan, Fl. Alappuzha Dist. 590. 2009. Bucholzia philoxeroides Mart., Nov. Acta Phys. Med. Acad. Caes. Leop. Carol. Nat. Cur. 13: 315. 1826.
  Malayalam Name(s): Vellamkanni
  Tamil name(s):
  English name(s): Alligatorweed
  Description: Perennial herbs with prostrate, fistular, striate, stem rooting at the nodes and eventually become erect and aerial, often much branched forming dense masses. Leaves opposite, 5-10 x 0.5-2.5 cm, elliptic to obovate-lanceolate with acute base, with midrib prominent on the lower surface; petiole 1-6 mm long. Inflorescence axillary (occasionally terminal), pedunculate (1-5 mm long) white, globose heads, 10-18 mm across; bracts ovate-lanceolate, glabrous, acute, 1-veined, faintly keeled. Perianth dorsally compressed, white glabrous; tepals 5, subequal oblong-lanceolate with mucronate tip 1-5 nerved. Fertile stamens 5, pseudo-staminodes longer than the filaments and lacerate at tips. Pollen 10-12 ?m, spherical with 7 large pores, surrounded by pentagonal ridges. Ovary shortly stalked, ovoid with slender style and capitate, densely papillose stigma.
  Habit: Herb
  Flowering & Fruiting: September-March
  District(s): Alappuzha, Ernakulam, Malappuram, Thrissur, Kannur, Kozhikkode, Wayanad
  Medicinal:
  Habitat: Shallow water pools, ditches and marshes and mangroves
  Distribution: Native of South America; now established in Indo-Malesia and Australia
  Aquatic: Yes
  Epiphyte(s): No
  Saprophyte: No
  Stem parasite: No
  Root parasite: No
  Flower colour(s): White
  Weed: Yes
  Monocot/Dicot: Dicotyledonous Plants
  Exotic: Yes
  Garden: No
  Edible: No
  Vegetable: No
  Endemic to:
  IUCN status:
  Altitude:
  Localities: Cherthala, Cochin
   
 
   
 
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