This name is a synonym of Spirodela polyrrhiza (L.) Schleid..
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 109302) with original publication details: J. Indian Bot. 2: 49 1921.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:526186-1.
This name was in version 1 of The Plant List, record kew-109302.