This name is a synonym of Hydrocotyle verticillata Thunb..
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 1700727) with original publication details: Prodr. 4: 70 1830.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:843667-1.
This name was in version 1 of The Plant List, record tro-1700727.