This name is a synonym of Sphagnum riparium Ångström.
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 35175597) with original publication details: Syn. Musc. Eur. (ed. 2) 834 1876.
This name was in version 1 of The Plant List, record tro-35175597.