The preference has generally been to recognize three families (Christenhusz et al. 2015): Capparaceae, Cleomaceae, and Brassicaceae s.s. For an overview of accepted genera in Brassicaceae s.s. see Al-Shehbaz (2012). Cleome in the traditional sense is clearly polyphyletic. For Florida species, the relevant genera include Arivela (A. viscosa), Cleoserrata (C. speciosa), Gynandropsis (G. gynandra), Sieruela (S. rutidosperma), and Tarenaya (T. hassleriana, T. spinosa) (Iltis & Cochrane 2007; Cochrane & Iltis 2014; Patchell et al. 2014; Roalson et al. 2015).