
1) Aquatic plant 2) Hydrophyte 3) Hydrophytic plant 4) Pistia stratiotes 5) Pistia stratoites 6) Water cabbage 7) Water lettuce 8) Water plant
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https://www.crosswordclues.com/clue/pistia

Pistia is a genus of aquatic plant in the arum family, Araceae. The single species it comprises, Pistia stratiotes, is often called water cabbage, water lettuce, Nile cabbage, or shellflower. Its native distribution is uncertain, but probably pantropical; it was first discovered from the Nile near Lake Victoria in Africa. It is now present, either...
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http://en.wikipedia.org/wiki/Pistia

(Water Lettuce) This tropical, aquatic plant is a native to tropical America and the southern parts of the U.S. The Water Lettuce, as it is commonly called, produces attractive rosettes of bright green, deeply veined, velvety leaves that grow up to 10 inches long and 4 inches wide. Inconspicuous, Arum-like, white flowers grow amidst the lush foliag...
Found on
http://www.encyclo.co.uk/local/10004

[
n] - pantropical floating plant forming a rosette of wedge-shaped leaves
Found on
http://www.webdictionary.co.uk/definition.php?query=pistia
water lettuce noun pantropical floating plant forming a rosette of wedge-shaped leaves; a widespread weed in rivers and lakes
Found on
https://www.encyclo.co.uk/local/20974
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