⚠ Version 1 of The Plant List has been superseded.

This name is in version 1.1 of The Plant List, record tro-26623761, with some changes.

Polystichum constantissimum Hayata is a synonym of Dryopteris formosana (H. Christ) C. Chr.

This name is a synonym of Dryopteris formosana (H. Christ) C. Chr..

The record derives from Tropicos which reports it as a synonym (record 26623761) with original publication details: Icon. Pl. Formosan. 4: 191-192, f. 129 191 1914.

Full publication details for this name can be found in IPNI: urn:lsid:ipni.org:names:17288790-1.