⚠ Version 1 of The Plant List has been superseded.

This name record (from WCSP (in review)) is not included in version 1.1 of The Plant List. It is possible the same name is included from a different data source, to check this you can search for Castilleja williamsii in version 1.1 of The Plant List.

Castilleja williamsii Pennell is a synonym of Castilleja purpurea var. lindheimeri (A.Gray) Shinners

This name is a synonym of Castilleja purpurea var. lindheimeri (A.Gray) Shinners.

The record derives from WCSP (in review) which reports it as a synonym with original publication details: Acad. Nat. Sci. Philadelphia Monogr. 1: 530 1935.

Full publication details for this name can be found in IPNI: urn:lsid:ipni.org:names:49777-2.