| Phyllospadix Hook., 1840 |
| Phyllospadix scouleri Hook., 1838 |
| Phyllospadix serrulatus Rupr. ex Asch., 1867 |
| Phyllospadix torreyi S. Watson, 1879 |
| Zostera L., 1753 |
| Zostera latifolia (Morong) Morong, 1893 |
| Zostera marina L., 1753 |
| Zostera marina f. latifolia (Morong) Setch., 1927 |
| Zostera marina f. typica Setch., 1927 |
| Zostera marina var. latifolia Morong, 1886 |
| Zostera marina var. stenophylla Asch. & Graebn., 1897 |
| Zostera maritima Gaertn., 1788 |
| Zostera oregana S. Watson, 1891 |
| Zostera pacifica S. Watson, 1891 |
| Zostera stenophylla Raf., 1818 |
| Zosteraceae Dumort., 1829 |