⚠ Version 1 of The Plant List has been superseded.
This name is in version 1.1 of The Plant List, record kew-2705018, with some changes.
This name is a synonym of Castilleja arachnoidea Greenm..
The record derives from WCSP (in review) which reports it as a synonym and as an invalid name with original publication details: Man. Pl. Oregon 664 1941.
Full publication details for this name can be found in IPNI: urn:lsid:ipni.org:names:800962-1.