This name is a synonym of Alisma wahlenbergii (Holmb.) Juz..
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 294801) with original publication details: Bot. Not. 1922: 207 1922.
This name was in version 1 of The Plant List, record kew-294801, and has not been changed.