This name is a synonym of Carex sylvatica subsp. paui (Sennen) A.Bolòs & O.Bolòs.
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 224379) with original publication details: Bull. Misc. Inform. Kew 1939: 99 1939.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:298492-1.
This name was in version 1 of The Plant List, record kew-224379.