⚠ Version 1 of The Plant List has been superseded.
This name record (from Tropicos) is not included in version 1.1 of The Plant List. It is possible the same name is included from a different data source, to check this you can search for Howardia ringens in version 1.1 of The Plant List.
This name is a synonym of Aristolochia ringens .
The record derives from Tropicos which reports it as a synonym (record 50217324
) with original publication details: Monatsber. Konigl. Preuss. Akad. Wiss. Berlin 1859: 607 607 1859.
Full publication details for this name can be found in IPNI: urn:lsid:ipni.org:names:93747-1
.