Worldwide, tropical and warm-temperate regions.
Genera ca. 28, species ca. 650 (3 genera, 4 species in the flora).
The broad circumscription of Capparaceae followed by A. Cronquist (1981) was similar to that of F. Pax and K. Hoffmann (1936). Traditionally, the approximately 45 genera and 800 species of Capparaceae in a broader sense have been classified into two major subfamilies, Capparoideae and Cleomoideae. Molecular and morphological analyses of the family and its relatives reveal that Capparaceae as traditionally circumscribed is paraphyletic, with the larger, mostly temperate family Brassicaceae embedded within it (J. E. Rodman et al. 1993, 1996; W. S. Judd et al. 1994; J. C. Hall et al. 2002, 2004). Chloroplast sequences strongly support the monophyly of each of the three lineages Brassicaceae, Capparaceae, and Cleomaceae, with strong support for a sister relationship of Cleomaceae to Brassicaceae (Hall et al. 2002, 2004). Rather than merging the three families into one, all-inclusive Brassicaceae (in the sense of Angiosperm Phylogeny Group 1998, 2003), it might be more acceptable to recognize the three clades as separate, amply distinct families (Zang M. L. and G. C. Tucker 2008). This bears out the proposal of the family by H. K. Airy Shaw (1964), who noted that recognition of Cleomaceae was “a logical necessity.” Cleomaceae can be distinguished from Capparaceae as follows:
Hall, J. C., H. H. Iltis, and K. J. Sytsma. 2004. Molecular phylogenetics of core Brassicales, placement of orphan genera Emblingia, Forchhammeria, Tirania, and character evolution. Syst. Bot. 29: 654–669.
|1||Plants usually glabrous or glabrescent, or rarely puberulent (hairs minute, stellate or simple) on branches, inflorescences, or abaxial surface of leaves.||Cynophalla|
|1||Plants lepidote or hairy (hairs stellate) on leaves, branchlets, and abaxial surface of sepals||> 2|
|2||Leaf blades narrowly oblong to linear-oblong; inflorescences racemes or flowers solitary (in axils ofdistal leaves); stamens ca. 6.||Atamisquea|
|2||Leaf blades ovate to ovate-elliptic or narrowly to broadly elliptic or lanceolate; inflorescences racemes or corymbs; stamens 8-30.||Quadrella|