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Posidonia
Posidonia is a genus of flowering plants. It contains nine species of marine plants ("seagrass"), found in the seas of the Mediterranean and around the south coast of Australia.
The APG system (1998) and APG II system (2003) accept this genus as constituting the sole genus in the family Posidoniaceae, which it places in the order Alismatales, in the clade monocots. The AP-Website concludes that the three families Cymodoceaceae, Posidoniaceae and Ruppiaceae form a monophyletic group. Earlier systems classified this genus in the family Potamogetonaceae or in the family Posidoniaceae but belonging to order Zosterales.
9 branches of this genus, most-observed first
Neptune Grass
speciesPosidonia oceanica
fibre-ball weed
speciesPosidonia australis
Posidonia sinuosa
speciesPosidonia sinuosa
Posidonia coriacea
speciesPosidonia coriacea
Posidonia angustifolia
speciesPosidonia angustifolia
Posidonia robertsoniae
speciesPosidonia robertsoniae
Posidonia ostenfeldii
speciesPosidonia ostenfeldii
Posidonia kirkmanii
speciesPosidonia kirkmanii
Posidonia denhartogii
speciesPosidonia denhartogii
Where it lives
Recorded sightings
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geo-referenced records in GBIF, from museums, herbaria and field observers.
Drag the globe to turn it. Dots are where records exist, not a range map; darker means more records.
In the stacks
Searching the stacks…
Every page naming Posidonia in the Biodiversity Heritage Library →
This page is assembled live from iNaturalist, GBIF, Wikipedia, the Source Library and the Internet Archive. It is not yet part of the hand-edited codex. iNaturalist taxon 118944.