⚠ Version 1 of The Plant List has been superseded.

This name is in version 1.1 of The Plant List, record kew-2828823, with some changes.

Gomphocarpus longifolius (Michx.) Spreng. is a synonym of Asclepias longifolia Michx.

This name is a synonym of Asclepias longifolia Michx..

The record derives from WCSP (in review) which reports it as a synonym with original publication details: Syst. Veg. 1: 849 1824.

Full publication details for this name can be found in IPNI: urn:lsid:ipni.org:names:97638-1.