| Name | Castilleja leonardii Rydberg | 
| Authorship | Rydberg | 
| Rank | Species | 
| Placed in | Castilleja Mutis ex Linnaeus f. | 
| Citation | 1907 Bull. Torrey Bot. Club 34(1): 36–37 | 
| Holdings | 10 Specimens held in the Harvard University Herbaria identified as Castilleja leonardii Rydberg | 
| Identification made in | [no date] (5), 1922 (2), 1943 (1), 1946 (2) |