| Name | Xyris brevifolia var. subcarinata Chapman ex Ries |
| Authorship | Chapman ex Ries |
| Rank | Variety |
| NomenclaturalStatus | NomLeg |
| Placed in | Xyris brevifolia Michaux |
| Citation | 1892 Bull. Torrey Bot. Club 19: 36 |
| Holdings | 1 Specimen held in the Harvard University Herbaria identified as Xyris brevifolia var. subcarinata Chapman ex Ries |
| Identification made in | [no date] (1) |