| Name | Cyanea ferox var. horrida Rock |
| Authorship | Rock |
| Rank | Variety |
| NomenclaturalStatus | NomLeg |
| Placed in | Cyanea ferox Hillebrand |
| Citation | 1917 Bull. Torrey Bot. Club 44: 235 |
| Holdings | 2 Specimens held in the Harvard University Herbaria identified as Cyanea ferox var. horrida Rock |
| Identification made in | [no date] (1), 1987 (1) |