| Name | Gilia tricolor subsp. diffusa (Congdon) H. Mason & A. D. Grant |
| Authorship | (Congdon) H. Mason & A. D. Grant |
| Rank | Subspecies |
| Placed in | Gilia tricolor Bentham |
| Holdings | 5 Specimens held in the Harvard University Herbaria identified as Gilia tricolor subsp. diffusa (Congdon) H. Mason & A. D. Grant |
| Identification made in | [no date] (4), 2018 (1) |