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CCDB → Angiosperms → Ceratophyllaceae → Ceratophyllum
| Taxon name | Status | Median (n) |
| Ceratophyllum demersum L. | Accepted | 12 |
| Ceratophyllum submersum L. | Accepted | 20 |
| Ceratophyllum echinatum A. Gray | Synonym of Ceratophyllum muricatum subsp. australe (Griseb.) Les | 12 |
| Ceratophyllum demersum var. quadrispinum Makino | Synonym of Ceratophyllum platyacanthum subsp. oryzetorum (Kom.) Les | 36 |
| Ceratophyllum submersum subsp. submersum | Synonym of Ceratophyllum submersum L. | 20 |