| Name | Zexmenia arnottii subforma gracilis Hassler |
| Authorship | Hassler |
| Rank | Subforma |
| NomenclaturalStatus | NomLeg |
| Placed in | Zexmenia arnottii (Baker) Hassler |
| Citation | 1916 Repert. Spec. Nov. Regni Veg. 14: 266 |
| Holdings | 1 Specimen held in the Harvard University Herbaria identified as Zexmenia arnottii subforma gracilis Hassler |
| Identification made in | 1987 (1) |