Najas marina
From Wikimedia Commons, the free media repository
APG III Classification: Domain: Eukaryota • Regnum: Plantae • Cladus: angiosperms • Cladus: monocots • Ordo: Alismatales • Familia: Hydrocharitaceae • Genus: Najas • Species: Najas marina L., Sp. Pl.: 1015 (1753)