This name is a synonym of Sphaerocephalus heterostichus (Hedw.) E. Britton.
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 35172805) with original publication details: Prodr. Aethéogam. 79 1805.
⥇ A cross-taxon basionym link was ignored while processing this record,
see Arrhenopterum heterostichum Hedw..
This name was in version 1 of The Plant List, record tro-35172805.