⚠ Version 1 of The Plant List has been superseded.
This name is in version 1.1 of The Plant List, record kew-2650513, and has not been changed.
This name is a synonym of Argemone mexicana f. leiocarpa (Greene) Ownbey.
The record derives from WCSP (in review) which reports it as a synonym with original publication details: Pflanzenr. IV, 104: 279 1909.
Full publication details for this name can be found in IPNI: urn:lsid:ipni.org:names:18820-2.