This name is a synonym of Sphagnum fuscum (Schimp.) H. Klinggr..
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 35175994) with original publication details: Allg. Bot. Z. Syst. 1: 115 1895.
This name was in version 1 of The Plant List, record tro-35175994, and has not been changed.