⚠ Version 1 of The Plant List has been superseded.

This name is in version 1.1 of The Plant List, record kew-2654818, and has not been changed.

Asclepias giffordii Eastw. is a synonym of Asclepias speciosa Torr.

This name is a synonym of Asclepias speciosa Torr..

The record derives from WCSP (in review) which reports it as a synonym with original publication details: Proc. Calif. Acad. Sci. IV, 20: 150 1931.

Full publication details for this name can be found in IPNI: urn:lsid:ipni.org:names:318932-2.