This name is a synonym of Rosmarinus × lavandulaceus Noë.
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 179877) with original publication details: Bull. Soc. Hist. Nat. Afrique N. 30: 297 1939.
This name was in version 1 of The Plant List, record kew-179877, and has not been changed.