This name is a synonym of Ocimum gratissimum L..
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 454076) with original publication details: Bull. Herb. Boissier II, 3: 980 1903.
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 Ocimum suave in version 1 of The Plant List.