This name is a synonym of Bolboschoenus maritimus subsp. paludosus (A.Nelson) T.Koyama.
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 9910444) with original publication details: Taxon 30: 845 1981.
This name was in version 1 of The Plant List, record tro-9910444.