Contains 3 accepted taxa overall.

Characteristics
Halophila Thouars
SEAGRASS
Classification
ALISMATALES
Halophila
Citation
HALOPHILA Du Petit-Thouars, Gen. Nov. Madagasc. 2. 1806.
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TYPE: Halophila ovalis (R. Brown) Hooker f. (Caulinia ovalis R. Brown) Lectotypified by Rydberg, in Britton, N. Amer. Fl. 17: 67. 1909.
Species
Scientific Name Common Name Herbarium Specimens Status Photos
Halophila decipiens CARIBBEAN SEAGRASS Native OBL (NWPL)
Halophila engelmannii ENGELMANN'S SEAGRASS Native OBL (NWPL)
Halophila johnsonii JOHNSON'S SEAGRASS Native Endemic Endangered-State Threatened-US OBL (NWPL)
[Family identification key]
1.  Leaves 4-8 in a pseudowhorl at the terminus of an erect stem
1.  Leaves usually 2 and petiolate, directly attached to rhizome
2
2.  Blade narrowly elliptic to linear-elliptic, 0.6-4 mm wide, margin entire, glabrous; only pistillate flowers produced, staminate flowers absent or unknown
2.  Blade oblong-elliptic, 3-8 mm wide, margin finely serrulate, pubescent to glabrous; staminate and pistillate flowers produced on same plant
Genus Synonyms
Synonym Full Citation Basionym Type
No synonyms found.