Checklist » Ruppiaceae » Ruppia maritima
Last updated 12/24/2015 by David Giblin.
Ruppia maritima L.[FNA22, HC, HC2]
beaked ditch-grass

Publication: Sp. Pl. 1: 127. 1753.

Origin: Native

selected vouchers: WTU

Notes: Recent phylogenetic study (Ito et al., 2010) suggests recognition of R. cirrhosa renders R. maritima paraphyletic. Moreover, the primary character used to separate these species is the number of coils in the peduncle, which likely is a plastic trait.


» Graves, A. H. 1908. The morphology of Ruppia mar iitima. Trans. Connecticut Acad. Arts 14: 59–170.
» Ito, Y., et al. 2010. Hybridization and polyploidy of an aquatic plant, Ruppia (Ruppiaceae), inferred from nuclear and plastid DNA phylogenies. American Journal of Botany 97(7): 1156–1167.
» Richardson, F. D. 1980. Ecology of Ruppia maritima L. in New Hampshire (U.S.A.) tidal marshes. Rhodora 82: 403–439.
Synonyms & Misapplied Names:
Ruppia cirrhosa (Petagna) Grande[FNA22]
Ruppia maritima L. var. obliqua (Schur) Asch. & Graebn.[Peck]
Ruppia maritima L. var. rostrata Agardh[Peck]
Ruppia occidentalis S. Watson[Abrams]