Azolla caroliniana  Willd.
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Kingdom: Plantae
Clade: Pteridophytes
Class: Polypodiopsida
Order: Salviniales
Family: Salviniaceae
Genus: Azolla
Species: caroliniana

  • Common names: Carolina mosquito fern, Carolina azolla, Water velvet, Water fern
  • Thai names: แหนแดง nae daeng (Northern)
  • Chinese names: 
  • Distribution: American tropics, dispersed to the tropics throughout the world and the range being dubious at present.​
  • Image locations: Chaiyaphum (Cheelong)
  • Map info: Provinces are highlighted according to phytogeographical areas as used in the Flora of Thailand project.
  • Additional notes: 
Azolla caroliniana image location map.jpg
Image locations
Images of Azolla caroliniana from Thailand.
Azolla caroliniana, Water Fern.jpg
Azolla caroliniana Willd. Cheelong Chaiyaphum October
References: 
The Plant List
Forest Herbarium - BKF​
​Ferns of Thailand, Laos and Cambodia