| Name | Clarkia gracilis subsp. sonomensis (Hitchcock) F. H. Lewis & M. E. Lewis |
| Authorship | (Hitchcock) F. H. Lewis & Marg. E. Lewis |
| Rank | Subspecies |
| Placed in | Clarkia gracilis (Piper) A. Nelson & J. F. Macbride |
| Citation | 1953 Madroño 12(2): 33 |
| Holdings | 12 Specimens held in the Harvard University Herbaria identified as Clarkia gracilis subsp. sonomensis (Hitchcock) F. H. Lewis & M. E. Lewis |
| Identification made in | [no date] (12) |
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