| Name | Collomia macrocalyx Leiberg & Brand |
| Authorship | Leiberg & Brand |
| Rank | Species |
| NomenclaturalStatus | NomLeg |
| Placed in | Collomia Nuttall |
| Citation | 1921 Repert. Spec. Nov. Regni Veg. 17(19-30): 317 |
| Holdings | 3 Specimens held in the Harvard University Herbaria identified as Collomia macrocalyx Leiberg & Brand |
| Identification made in | [no date] (2), 1983 (1) |