This name is a synonym of Launaea angustifolia (Desf.) Kuntze.
The record derives from TICA
(data supplied on 2012-02-11)
which reports it as a synonym (record C66E7074-59B2-40CD-BF22-0AA679C9FBC6) with original publication details: Nouv. Mat. Fl. Atl. 263. 263 1875.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:241320-1.
This name was in version 1 of The Plant List, record gcc-5724.