| Name | Monardella undulata subsp. arguellensis Elvin & A. C. Sanders |
| Authorship | Elvin & A. C. Sanders |
| Rank | Subspecies |
| Placed in | Monardella undulata Bentham |
| Citation | 2009 Novon 19(3): 317 |
| Holdings | 2 Specimens held in the Harvard University Herbaria identified as Monardella undulata subsp. arguellensis Elvin & A. C. Sanders |
| Identification made in | 2012 (1), 2016 (1) |