⚠ Version 1 of The Plant List has been superseded.

This name is in version 1.1 of The Plant List, record kew-2655114, with some changes.

Asclepias quadrifolia var. oppositifolia Raf. is a synonym of Asclepias quadrifolia Jacq.

This name is a synonym of Asclepias quadrifolia Jacq..

The record derives from WCSP (in review) which reports it as a synonym with original publication details: Autik. Bot. 177 1840.

Full publication details for this name can be found in IPNI: urn:lsid:ipni.org:names:21277-2.