This is the broad circumscription that includes the Old World" Misopates" and New World "Sairocarpus". By contrast the narrow circumscription ("sensu stricto") confines the genus to the monophyletic Old World perennial species with a diploid chromosome number of 16, distributed in the Mediterranean basin, approximately 25 species. (Tolety 2011), following the phylogenetic analysis of Vargas "et al." (2004) suggesting they are a distinct group. Both "Misopates" and "Sairocarpus" are accepted names in "The Plant List", and many of the New World species now have "Sairocarpus" as their accepted name, rather than "Antirrhinum". It has been proposed that many of the New World "Antirrhinum" be now considered under "Sairocarpus", in the forthcoming "Flora of North America".