English: sea grasses.
TaxonomyThe 5 families
Zosteraceae,
Cymodoceaceae,
Posidoniaceae,
Potamogetonaceae and
Ruppiaceae form one monophyletic clade in the
Apg3 classification. The are sea grasses.
In the
Plant theory they are treated as one family
Zosteraceae. It is placed in
Subphase 3. They have 16 genera.
FamiliesCymodoceaceae: Manatee-grass family; Sea grasses; Amphibolis, Cymodocea, Halodule, Syringodium, Thalassodendron
Posidoniaceae: Sea grass family: Posidonia.
Potamogetonaceae: Pondweed family; Althenia, Groenlandia, Lepilaena, Potamogeton, Stuckenia, Zannichellia.
Ruppiaceae: Ruppia.
Zosteraceae: Sea grass family; Phyllospadix, Zostera, including Heterozostera, Zostera, Zosterella.