Thanks for digging more dear Surajit ji, But Salvia splendens Ker Gawler is a superfluous/illegitimate<http://www.bgbm.org/iapt/nomenclature/code/saintlouis/0057Ch5RejoNa52.htm>name. Please check for the following link from Tropicos<http://www.tropicos.org/NamePublicationDetail.aspx?nameid=50272427>
The accepted name for your plant should be Salvia splendens Sellow ex Roem. & Schult as maintained by GRIN/The Plant List/Catalogue of Life<http://www.catalogueoflife.org/col/details/species/id/11787416> . Best regards, Ritesh. --

