33 genera and about 700 species. The largest genera are Capparis (about 150 species), Maerua (~100 species), Boscia (37 species) and Cadaba (30 species).
The family had long been considered to be closely related to and has been included in the mustard family, Brassicaceae (APG, 1998), in part because both groups produce glucosinolate (mustard oil) compounds. Subsequent molecular studies (Hall et al., 2002, 2008) support that Capparaceae s.s. is paraphyleticwith respect to Brassicaceae and must be considered a separate family. However Cleome and several related genera are more closely related to Brassicaceae than to Capparaceae. These genera are now either placed in Brassicaceae (as subfam. Clemoideae) or segregated into Cleomaceae. Several more genera of the traditional Capparaceae are more closely related to other members of the Brassicales, and the relationships of several more remain unresolved (Hall et al. 2004). Based on morphological grounds and supported by molecular studies the American species traditionally identified as Capparishave been transferred to resurrected old generic names and several new genera have been recently described (Cornejo & Iltis 2006, 2008a-e; Iltis & Cornejo, 2007; Hall, 2008).
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[edit]Genera
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[edit]Excluded genera
- Cleome L. -> Cleomaceae
- Cleomella DC. -> Cleomaceae
- Dactylaena Schrad. ex Schult.f. -> Cleomaceae
- Forchhammeria Liebm. -> Stixaceae
- Haptocarpum Ule -> Cleomaceae
- Koeberlinia Zucc. -> Koeberliniaceae
- Oceanopapaver Guillaumin -> Malvaceae sensu lato, subfamily Grewioideae or Tiliaceae, as synonym of Corchorus L.
- Oxystylis Torr. & Frem. -> Cleomaceae
- Pentadiplandra Baill. -> Pentadiplandraceae
- Physena Noronha ex Thouars -> Physenaceae
- Podandrogyne Ducke -> Cleomaceae
- Polanisia Raf. -> Cleomaceae
- Stixis Lour. -> Stixaceae
- Tirania Pierre -> Stixaceae
- Wislizenia Engelm. -> Cleomaceae[3]
- Additional genera to be excluded from Capparaceae, according to Kers in Kubitzki
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- 1. Genera that may be capparalean but do not fit within Capparaceae
- Neothorelia Gagnep.
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- 2. Genera that are insufficiently known but whose descriptions indicate that they cannot belong to Capparaceae
- Borthwickia W.W.Sm.
- Keithia Spreng.
- Poilanedora Gagnep.
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- 3. Genera not treated in Kubitzki, but usually regarded as Capparaceae
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