| Name | Castilleja sulphurea Rydberg |
| Authorship | Rydberg |
| Rank | Species |
| Placed in | Castilleja Mutis ex Linnaeus f. |
| Citation | 1900 Mem. New York Bot. Gard. 1: 359 |
| Holdings | 86 Specimens held in the Harvard University Herbaria identified as Castilleja sulphurea Rydberg |
| Identification made in | [no date] (66), 1922 (12), 1930 (1), 1935 (2), 1938 (1), 1966 (1), 1967 (2), 1984 (1) |
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