1. Family: Fabaceae Lindl.
    1. Platysepalum Welw. ex Baker

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

    [FZ]

    Flora Zambesiaca Leguminosae subfamily Papillionoideae by B. Verdcourt

    Leaves
    Leaves imparipinnate; leaflets in 2 or more pairs, opposite, stipellate; stipules very small, falling early. Leaves imparipinnate; leaflets in 2 or more pairs, opposite, stipellate; stipules very small, falling early.
    Calyx
    Calyx tube campanulate; upper pair of teeth joined to form a very broad emarginate hood as large as the standard; lower 3 teeth narrowly lanceolate. Calyx tube campanulate; upper pair of teeth joined to form a very broad emarginate hood as large as the standard; lower 3 teeth narrowly lanceolate.
    Corolla
    Standard oblate and emarginate to obcordate, shortly clawed, glabrous. Standard oblate and emarginate to obcordate, shortly clawed, glabrous.
    Stamens
    Upper stamen joined only near base of filament sheath. Upper stamen joined only near base of filament sheath.
    Ovary
    Ovary sessile, pubescent, 5–7-ovuled; style filiform, glabrous, incurved with minute terminal stigma.
    Fruits
    Pod dehiscent, woody, compressed, 3–5-seeded. Pod dehiscent, woody, compressed, 3–5-seeded.
    Seeds
    Seeds, discoid or compressed-oblong. Seeds, discoid or compressed-oblong.
    Habit
    Small trees, shrubs or lianes. Small trees, shrubs or lianes.
    Inflorescences
    Inflorescences paniculate, axillary, the branches pseudoracemose, many-flowered; bracteoles large, oblong, sometimes persistent. Inflorescences paniculate, axillary, the branches pseudoracemose, many-flowered; bracteoles large, oblong, sometimes persistent.
    Pistil
    Ovary sessile, pubescent, 5–7-ovuled; style filiform, glabrous, incurved with minute terminal stigma.
    [LOWO]

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

    Habit
    Trees, shrubs or lianas
    Ecology
    Tropical rain forest to seasonally dry lowland forest, often in disturbed sites
    Distribution
    mostly WC Africa (Guineo-Congolian region), 1 sp. in the Zanzibar-Inhambane region
    Note
    A genus in need of revision; Geesink (1984) considered Platysepalum to be closely related to Millettia, but tentatively placed here near Dewevrea

    Relationships among genera of Millettieae have been notoriously difficult to unravel based on traditional morphological evidence and this is exemplified by the alphabetical arrangement of genera in the tribal treatments of Geesink (1981; 1984) and Polhill (1994). Geesink (1981) recognised 44 genera and c. 870 species in tribe Millettieae (as ‘Tephrosieae’) while 43 genera were accounted for in Geesink (1984) and Polhill (1994). The genera recognised, however, varied considerably with only 33 genera in common to both treatments of Geesink, while the list of Polhill (1994) combined elements of Geesink (1981, 1984) with new data accumulated since then. Tephrosia has traditionally comprised some 400 species but this is re-estimated at c. 350 species here.

    The traditional circumscription of the predominantly pantropical and subtropical tribe Millettieae is followed here (Fig. 45), with 45 genera and (904)–909–(914) species being recognised, (i.e. excluding the two genera and 11 species transferred to Brongniartieae, see Table 8), although the concept of what comprises Millettieae sens. strict. is changing rapidly based on evidence from molecular phylogenies. Sequence data for millettioid genera comes from the plastid rbcL gene (Doyle et al., 1997; 2000; Kajita et al., 2001; Hu & Chang, 2003), phytochrome nucleotide genes (Lavin et al., 1998), the plastid trnK-matK region (Hu et al., 2000) and the nuclear ITS region (Hu, 2000; Hu et al., 2002). Molecular data, together with reinterpreted evidence based on chemistry (Evans et al., 1985) and wood anatomy (Gasson et al., 2004), have been the basis for recognising a number of informal suprageneric groupings and for transferring Cyclolobium and Poecilanthe to tribe Brongniartieae (Table 8; Fig. 45).

     The most far-reaching result of the above molecular analyses was that a substantial part of the traditionally circumscribed tribe Phaseoleae is more closely allied to the core-Millettieae than to the Phaseoleae sens. lat. clade (see page 393). Circumscription of a revised tribe Millettieae is not possible at present until genera are more comprehensively sampled; however, a Millettioid sens. strict. group might be expected to include some genera in the basal millettioid and phaseoloid group, Phaseoleae subtribes Diocleinae, Ophrestiinae and in small part the Erythrininae, tribe Abreae and the core-Millettieae (Fig. 45). The basal millettioid and phaseoloid group comprises 17 genera (94 species) that may belong either in the Millettioids sens. strict. or Phaseoleae sens. lat., or to a clade sister to both these groups (e.g., Kajita et al., 2001). The core-Millettieae clade comprises c. 22 genera and c. 777 spp., with some additional generic segregates being necessary within the ‘canavanine group’ (Evans et al., 1985), to accommodate species of Millettia sens. lat. and Fordia sens. lat., which on the basis of molecular and chemical evidence are excluded from Millettia and Fordia sens. strict.

    Relationships between the major groups of genera centred on Lonchocarpus, Derris, Millettia and Tephrosia remain obscure, and still reflect a geographical bias in segregating them, i.e. distributions are limited largely to the New World in the Lonchocarpus group, and the Old World in the other groups. The suggestion that the Andean South American genus Apurimacia might be sister to the largely Old World Tephrosia rather than to Lonchocarpus (e.g., Kajita et al., 2001) is possibly indicative of other Old World–New World sister groups yet to be found. Further molecular evidence will probably result in an overall reduction in the number of genera recognised, particularly in the Tephrosia and Lonchocarpus groups where various small or monotypic ‘one-organ’ genera may be better placed within larger genera. Ptycholobium, Requienia and Paratephrosia, for example, are difficult to distinguish from Tephrosia, but for the emphasis traditionally placed on their atypical pods.

    [FTEA]

    Leguminosae, J. B. Gillett, R. M. Polhill & B. Verdcourt. Flora of Tropical East Africa. 1971

    Habit
    Trees, shrubs or lianes only differing from that group of species in Millettia which includes M. puguënsis in having the 2 upper calyx-teeth greatly enlarged to form an upper lip that is wider towards the apex than at the base and is as large as the standard, which it almost completely hides
    Calyx
    The lower calyx-teeth are free, lanceolate and shorter than the upper lip, though longer than the tube.
    [LOWO]
    Use
    Used for materials (timber, rope, resin), medicine and as ornamentals

    Images

    Distribution

    Native to:

    Angola, Cameroon, Central African Repu, Congo, Equatorial Guinea, Gabon, Ghana, Guinea, Ivory Coast, Liberia, Mozambique, Nigeria, Sierra Leone, Tanzania, Zaïre

    Platysepalum Welw. ex Baker appears in other Kew resources:

    First published in D.Oliver & auct. suc. (eds.), Fl. Trop. Afr. 2: 131 (1871)

    Literature

    Flora of West Tropical Africa
    • in F.T.A. 2: 131 (1871).
    Flora Zambesiaca
    • Gillett in Kew Bull. 14: 464–467 (1960).
    • —Gillett in Kew Bull. 14: 464–467 (1960).
    • in F.T.A. 2: 131 (1871).
    Flora of Tropical East Africa
    • Gillett in K.B. 14: 464–467 (1960)
    • in F.T.A. 2: 131 (1871)

    Sources

    Flora Zambesiaca
    Flora Zambesiaca
    http://creativecommons.org/licenses/by-nc-sa/3.0

    Flora of Tropical East Africa
    Flora of Tropical East Africa
    http://creativecommons.org/licenses/by-nc-sa/3.0

    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