This name is a synonym of Ocimum americanum L..
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 460736) with original publication details: Bot. Jahrb. Syst. 10: 267 1888.
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 canum in version 1 of The Plant List.