Najas Marina, or more commonly know as Spiny Naiad, is a forb/herb (a forb/herb is a non-woody plant that is not a grass) of the genus Najas. Its duration is annual which means it grows for one season only. Najas Marina or Spiny Naiad's floral region is North America US Lower 48, Hawaii and Puerto Rico, specifically in the states of Arizona, California, Florida, Hawaii, Iowa, Illinois, Indiana, Michigan, Minnesota, North Dakota, Nebraska, New Mexico, Nevada, New York, Ohio, Oklahoma, Pennsylvania, South Dakota, Texas, Utah, Virginia and Wisconsin.
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