Ruppia spiralis

Ruppia spiralis
Scientific classification
Kingdom:	Plantae
Clade:	Angiosperms
Clade:	Monocots
Order:	Alismatales
Family:	Ruppiaceae
Genus:	Ruppia
Species:	R. spiralis
Binomial name
Ruppia spiralis L. ex Dumort.

Ruppia spiralis is an aquatic plant species in the genus Ruppia of Ruppiaceae. This name was synonymized under R. cirrhosa, but is resurrected for the species previously referred to as R. cirrhosa.

...
Wikipedia