That being said, from a taxonomic standpoint, Thai basil, lemon basil, and western Sweet Basil are both varieties of Ocimum basilicum, while Holy Basil or tulsi

That being said, from a taxonomic standpoint, Thai basil, lemon basil, and western Sweet Basil are both varieties of Ocimum basilicum, while Holy Basil or tulsi is a separate species Ocimum tenuiflorum