This name is a synonym of Carex acuta L..
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 461003) with original publication details: Verh. Naturwiss. Vereins Hamburg III, 12: 11 1904.
This name record (from WCSP) was not included in version 1 of The Plant List. It is possible the same name was included from a different data source, to check this you can search for Carex gracilis in version 1 of The Plant List.