This name is a synonym of Lomatium nuttallii (A. Gray) J.F. Macbr..
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 50094373) with original publication details: Proc. Amer. Acad. Arts 8: 287–288 1870.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:234714-2.
This name was in version 1 of The Plant List, record tro-50094373, and has not been changed.