| Name | Hydrurus irregularis f. causta Rabenhorst |
| Authorship | Rabenhorst |
| Rank | Forma |
| NomenclaturalStatus | Unknown |
| Placed in | Hydrurus irregularis Kützing |
| Remarks | Created from Taxon Name Import: Hydrurus irregularis f. causta Rabenhorst |
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