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  Acorus calamus
 
  Family: ARACEAE
  Citation:  Acorus calamus L., Sp. Pl. 324. 1753; Hook. f., Fl. Brit. India 6: 555. 1893; Gamble, Fl. Pres. Madras 1577(1100). 1931; Manilal & Sivar., Fl. Calicut 306. 1982; Antony, Syst. Stud. Fl. Kottayam Dist. 420. 1989; Joseph, Aquatic Angiosp. Malabar 283. 1991; M. Mohanan & Henry, Fl. Thiruvanthapuram 495. 1994; Ravikumar & Ved, Illustr. Field Guide 100 Red Listed Med. Pl. 34. 2000; Sunil & Sivadasan, Fl. Alappuzha Dist. 727. 2009; Ratheesh Narayanan, Fl. Stud. Wayanad Dist. 901. 2009.
  Malayalam Name(s): Vayambu, Vashanpa
  Tamil name(s): Vachha
  English name(s): Sweet flag, Sweet root
  Description: A strongly aromatic semi-aquatic perennial herb; rhizomes creeping, jointed, somewhat vertically compressed, 1.3-2.5 cm thick, pale to dark brown and spongy inside. Leaves narrow, up to 80 cm long, linear to narrowly ensiform, glossy bright green, apex acute, base amplexicaul; petioles sheathing for 20-50 cm. Flowers pale green, fragrant, arranged compactly on a sessile, cylindrical, stumpy spadix 5-7 cm long. Fruits (berries) green, angular, 3-celled, fleshy, containing 1-3 oblong seeds.
  Habit: Herb
  Flowering & Fruiting: April-July
  District(s): Kottayam, Alappuzha, Idukki, Thiruvananthapuram, Kozhikkode, Wayanad, Thrissur, Ernakulam, Palakkad, Malappuram
  Medicinal: Yes
  Habitat: Semi-aquatic and marshy localities
  Distribution: North temperate hemisphere and Tropical Asia
  Aquatic: Yes
  Epiphyte(s): No
  Saprophyte: No
  Stem parasite: No
  Root parasite: No
  Flower colour(s): Green
  Weed: No
  Monocot/Dicot: Monocotyledonous Plants
  Exotic: Yes
  Garden: No
  Edible: No
  Vegetable: No
  Endemic to:
  IUCN status:
  Altitude: -2400
  Localities: Old Devicolam, Manalady
   
 
   
 
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