This name is a synonym of Andreaea nitida var. aquatica (R. Br. bis) W. Martin.
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 35103571) with original publication details: Trans. & Proc. New Zealand Inst. 25: 282. 23, 24 1893.
This name was in version 1 of The Plant List, record tro-35103571, and has not been changed.