| Name | Castilleja exilis A. Nelson |
| Authorship | A. Nelson |
| Rank | Species |
| Placed in | Castilleja Mutis ex Linnaeus f. |
| Citation | 1904 Proc. Biol. Soc. Washington 17(12): 100 |
| Holdings | 59 Specimens held in the Harvard University Herbaria identified as Castilleja exilis A. Nelson |
| Identification made in | [no date] (49), 1922 (1), 1930 (8), 1967 (1) |
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