Potamogeton praelongus
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APG III Classification: Domain: Eukaryota • (unranked): Archaeplastida • Regnum: Plantae • Cladus: angiosperms • Cladus: monocots • Ordo: Alismatales • Familia: Potamogetonaceae • Genus: Potamogeton • Species: Potamogeton praelongus Wulfen, Arch. Bot. (Leipzig) 3(3): 331 (1805)