⚠ Version 1 of The Plant List has been superseded.
This name is in version 1.1 of The Plant List, record tro-50108070, with some changes.
This name is a synonym of Calystegia spithamaea subsp. purshiana .
The record derives from Tropicos which reports it as a synonym (record 50108070
) with original publication details: Proc. Pennsylvania Acad. Sci. 7: 163 163 1933.
Full publication details for this name can be found in IPNI: urn:lsid:ipni.org:names:294952-2
.