Contains 3 accepted taxa overall.
Characteristics
Classification
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. | |||