| Name | Castilleja gracillima Rydberg |
| Authorship | Rydberg |
| Rank | Species |
| Placed in | Castilleja Mutis ex Linnaeus f. |
| Citation | 1907 Bull. Torrey Bot. Club 34(1): 39–40 |
| Holdings | 12 Specimens held in the Harvard University Herbaria identified as Castilleja gracillima Rydberg |
| Identification made in | [no date] (12) |
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