Position in a system
| system | Vitae - living organisms |
| domain | Eukaryota Whittaker & Margulis, 1978 - lifeforms with nucletic cells |
| superregnum | Bikonta - bikonts |
| Corticata | |
| Archaeplastida | |
| kingdom | Plantae Haeckel - plants |
| divisio | Magnoliophyta Cronquist, Takht. & W.Zimm. - flowering plants |
| class | Liliopsida Batsch - monocotyledons |
| order | Alismatales Dumortier |
| family | Ruppiaceae Horaninow |
| genus | Ruppia L. - widgeonweed |
| species | Ruppia cirrhosa (Petagna) Grande - Spiral Tasselweed |