Mentha citrata

About

Eau de Cologne mint, also known as orange mint and bergamot mint, is a cultivated mint. In a 1970 study, most plants were found to be male sterile forms of Mentha aquatica, so were regarded as Mentha aquatica var. citrata, although in England the hybrid Mentha × piperita was found. The Royal Horticultural Society treats Eau de Cologne mint as Mentha × piperita f. citrata. The World Checklist of Selected Plant Families sinks both scientific names into Mentha aquatica.

Summary from Wikipedia