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JC Schou   cc-by-nc

Najas marina (Holly Leaved Naiad) is a species of annual herb in the family Hydrocharitaceae. They have a self-supporting growth form. They are native to Piauí, Canada, Pernambuco, SãO Paulo, Puerto Rico, Cerrado, Rio De Janeiro, ParaíBa, Mata Atlântica, Ceará, and The Contiguous United States. They have simple, broad leaves. Individuals can grow to 0.38 m.

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EOL has data for 30 attributes, including:

Known occurrences, collected specimens and observations of Holly-leaved Naiad. View this species on GBIF