⚠ Version 1 of The Plant List has been superseded.
This name is in version 1.1 of The Plant List, record kew-2415631, with some changes.
This name is a synonym of Polycarpon tetraphyllum subsp. alsinifolium .
The record derives from WCSP (in review) which reports it as a synonym with original publication details: Comp. Fl. Ital. 112 1882.
Full publication details for this name can be found in IPNI: urn:lsid:ipni.org:names:151753-3
.