| Name | Hydrurus subramosus Wartmann |
| Authorship | Wartmann |
| Rank | Species |
| Placed in | Hydrurus C. Agardh |
| Citation | 1861 [Jun 1861] Algen Eur. Dec. 9/10: no. 1094 |
| Holdings | 1 Specimen held in the Harvard University Herbaria identified as Hydrurus subramosus Wartmann |
| Identification made in | [no date] (1) |