This name is a synonym of Pimpinella saxifraga subsp. nigra (Mill.) Gaudin.
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 1703702) with original publication details: Gard. Dict. (ed. 8) n.4 1768.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:846932-1.
This name was in version 1 of The Plant List, record tro-1703702, and has not been changed.