| Name | Castilleja arachnoidea Greenman |
| Authorship | Greenman |
| Rank | Species |
| NomenclaturalStatus | Unknown |
| Placed in | Castilleja Mutis ex Linnaeus f. |
| GUID | urn:lsid:ipni.org:names:49403-2 |
| Holdings | 37 Specimens held in the Harvard University Herbaria identified as Castilleja arachnoidea Greenman |
| Identification made in | [no date] (35), 1967 (1), 1977 (1) |