A genus of about 900 species, shrubs and herbs, almost cosmopolitan. Walker et al. (2004) and Walker & Sytsma (2007) have determined that Salvia as traditionally circumscribed is polyphyletic. Will & Claßen-Bockhoff (2017) proposed splitting Salvia into multiple genera (and retaining Rosmarinus as a genus), while Drew et al. (2017) proposed treating Salvia broadly and including Rosmarinus in it. At least until a coherent system of splitting Salvia is presented, it seems best to include Rosmarinus.
Ref: Drew et al. (2017); Epling (1938); Keener & Diamond (2018) In Weakley et al. (2018a); Stace (2010); Walker & Sytsma (2007); Walker et al. (2004); Will & Claßen-Bockhoff (2017). Show full citations.