⚠ Version 1 of The Plant List has been superseded.
This name record (from Tropicos) is not included in version 1.1 of The Plant List. It is possible the same name is included from a different data source, to check this you can search for Cyclosorus extensus in version 1.1 of The Plant List.
This name is a synonym of Thelypteris opulenta .
The record derives from Tropicos which reports it as a synonym (record 26623546
) with original publication details: Bull. Fan Mem. Inst. Biol., Bot. 8(4): 182-184 182 1938.