1. Family: Fabaceae Lindl.
    1. Calobota Eckl. & Zeyh.

      1. This genus is accepted, and is native to Africa..

    [LOWO]

    Legumes of the World. Edited by G. Lewis, B. Schrire, B. MacKinder & M. Lock. Royal Botanic Gardens, Kew. (2005)

    Habit
    Spinescent shrubs or shrublets. Branches thick and woody; young branches green, lacking bark (expect C.acanthoclada)
    Distribution
    The species of Calobota occur in southern and south-western South Africa and Namibia, with the exception of Calobota saharae, which is endemic to North Africa, where it occurs on sand dunes from Libya to Algeria and Morocco
    Note
    Calobota was reduced to a section of Lebeckia in 1844 by Bentham (pro parte majore). It has been reinstated as a genus by Boatwright et al. 2009, who expanded the concept to include the genus Stiza, and also the monotypic North African Spartidium (but excluding Lebeckia mucronata)
    [LOWO]

    Legumes of the World. Edited by G. Lewis, B. Schrire, B. MacKinder & M. Lock. Royal Botanic Gardens, Kew. (2005)

    Vernacular
    Spanish broom
    Habit
    Shrub
    Ecology
    Desert on sand dunes
    Distribution
    N Africa (Morocco to Libya), in the Sahara Regional Transition Zone (White, 1983)
    Note
    This is a poorly known genus in need of further study; morphologically S. saharae (Coss. & Durieu) Pomel, is practically inseparable from Lebeckia (Polhill, 1976) but the generic concept is supported by the accumulation of ammodendrine (a bipiperidyl alkaloid) and the virtual absence of the characteristic quinolizidine alkaloids of Lebeckia (Van Wyk et al., 1989); the genus may thus be better placed in Genisteae

    The current state of knowledge of the Crotalarieae was reviewed by Van Wyk (1991a) and by Van Wyk & Schutte (1995a). The most conspicuous recent change has been the exclusion of the Argyrolobium group (six genera, i.e. Argyrolobium, Dichilus, Melolobium, Polhillia, Anarthrophyllum and Sellocharis), which belong in tribe Genisteae rather than in Crotalarieae, where they were previously placed (Polhill, 1981q: 399 –402). New insights into relationships within the tribe have come mainly from chemosystematic studies of alkaloids (summarised in Van Wyk & Verdoorn, 1990) and several recent generic monographs (see below).

    The Crotalarieae forms part of a monophyletic clade, the ‘core genistoids’ (Fig. 36) which also includes Genisteae, Podalyrieae, Thermopsideae, Brongniartieae, Euchresteae and Sophoreae sens. strict. (Crisp et al., 2000; Pennington et al., 2000a; Kajita et al., 2001). Crotalarieae appears to be sister to the Genisteae and both are sister to the Podalyrieae (Crisp et al., 2000; Wojciechowski et al., 2004). This clade is in turn sister to the Thermopsideae and Sophoreae sens. strict. (including Euchresteae).

    The Crotalarieae shares with the Podalyrieae the absence of a-pyridone alkaloids such as cytisine and anagyrine that are a typical feature of all other ‘core genistoid’ tribes. Despite a lack of defining characters, the monophyly of the tribe as circumscribed here is well supported by molecular evidence (Crisp et al., 2000; Wink & Mohamed, 2003) and by cladistic analyses of morphological, cytological and chemical characters (Van Wyk & Schutte, 1995a). The latter study suggested an early diversification of the genera with uniform anthers and lupanine-type esters of quinolizidine alkaloids (Pearsonia, Rothia and Robynsiophyton) followed by the poorly known Spartidium and then the so-called ‘Cape group of genera’ (Polhill, 1981q: 399–402), which now includes Lotononis and Crotalaria. Relationships between the seven genera of the ‘Cape group’ remains unresolved despite several recent molecular studies because sampling is still relatively poor. However, a basally branching position in the tribe of the ‘Cape group’, notably Lebeckia and Wiborgia — as considered by Polhill (1976, 1981q) — is now accepted here. The exclusion of the Argyrolobium group, based on morphological and chemical characters, is also strongly supported by DNA sequence data. Due to reticulate and overlapping patterns of character state distribution in the Crotalarieae sens. strict., generic delimitations are intricate and subject to misinterpretation. Several of the large and diverse genera appear to be either monophyletic or paraphyletic depending on the choice of characters. As currently circumscribed the tribe includes 11 genera and c. 1204 species (Fig. 37).

    Distribution

    Native to:

    Algeria, Botswana, Cape Provinces, Libya, Morocco, Namibia, Tunisia

    Calobota Eckl. & Zeyh. appears in other Kew resources:

    First published in Enum. Pl. Afric. Austral.: 192 (1836)

    Not accepted by

    • Govaerts, R. (1999). World Checklist of Seed Plants 3(1, 2a & 2b): 1-1532. MIM, Deurne. [Cited as Lebeckia.]

    Sources

    Kew Backbone Distributions
    The International Plant Names Index and World Checklist of Selected Plant Families 2018. Published on the Internet at http://www.ipni.org and http://apps.kew.org/wcsp/
    © Copyright 2017 World Checklist of Selected Plant Families. http://creativecommons.org/licenses/by/3.0

    Kew Names and Taxonomic Backbone
    The International Plant Names Index and World Checklist of Selected Plant Families 2018. Published on the Internet at http://www.ipni.org and http://apps.kew.org/wcsp/
    © Copyright 2017 International Plant Names Index and World Checklist of Selected Plant Families. http://creativecommons.org/licenses/by/3.0

    Legumes of the World Online
    http://creativecommons.org/licenses/by-nc-sa/3.0