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CCDB → Angiosperms → Zosteraceae → Phyllospadix
| Taxon name | Status | Median (n) |
| Phyllospadix iwatensis Makino | Accepted | 10 |
| Phyllospadix japonicus Makino | Accepted | 10 |
| Phyllospadix japonicus | Synonym of Phyllospadix japonicus Makino | 10 |