Najas wrightiana is a submersed aquatic herb growing in slow moving streams and ponds. It occurs in sub-tropical and tropical regions of the Americas, and is found in the Big Cypress Swamp in south Florida. Plants are bushy with slender and branched stems; leaves are linear with coarse teeth, opposite or crowded and whorled, with sheathlike bases. Outstanding taxonomic characters are fruit dimensions, seed reticulations, leaf sheaths and teeth along leaf blades.
See Taxonomy of the genus Najas L. (Najadaceae) in the Neotropics, R.M. Lowden, Aquatic Botany 24(2):147-184. 1986.