| Name | Castilleja ambigua subsp. humboldtiensis (D. D. Keck) T. I. Chuang & Heckard |
| Authorship | (D. D. Keck) T. I. Chuang & Heckard |
| Rank | Subspecies |
| Placed in | Castilleja ambigua Hooker & Arnott |
| GUID | urn:lsid:ipni.org:names:967048-1 |
| Holdings | 6 Specimens held in the Harvard University Herbaria identified as Castilleja ambigua subsp. humboldtiensis (D. D. Keck) T. I. Chuang & Heckard |
| Identification made in | [no date] (3), 2003 (3) |