1. Family: Fabaceae Lindl.
    1. Decorsea R.Vig.

      1. This genus is accepted, and its native range is Tanzania to S. Africa, Madagascar.

    [LOWO]

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

    Habit
    Herbs or subshrubs
    Ecology
    Seasonally dry tropical and subtropical woodland and woodland margins, bushland, thicket or xerophytic scrub
    Distribution
    southern Africa (3 spp.) and Madagascar (3 spp.)
    Note
    Traditionally placed in subtribe Phaseolinae, perhaps allied to Otoptera

    Previous accounts of the Phaseoleae by Baudet (1978) and Lackey (1981) recognised 90 and 84 genera and c. 1540 and 1480 species respectively in the tribe. In an equivalent, i.e. traditionally held view of Phaseoleae, 89 genera and (1554)–1567–(1580) species are treated here (Table 9; Fig. 47). Changes between Baudet (1978) and this treatment are that eleven genera are now in synonymy or have subsequently been placed in Millettieae, two genera have been transferred from Desmodieae and eight new genera have been added. Vigna has traditionally been thought to comprise some 150–200 species, but Vigna sens. strict. may contain fewer than 100.

    Recent molecular analyses of the tribe, however, have emphasised both the polyphyletic and paraphyletic nature of Phaseoleae as traditionally circumscribed (Bruneau & Doyle, 1990; Doyle & Doyle, 1993; Delgado Salinas et al., 1993; Bruneau et al., 1995; Doyle et al., 1997, 2000; Kajita et al., 2001; Goel et al., 2001; Lee & Hymowitz, 2001). This has required a radical realignment of elements of the phaseoloids (Table 9; Fig. 47), with at least two major clades being evident: Phaseoleae subtribes Diocleinae and Ophrestiinae which together with tribe Abreae are allied to the core-Millettieae (Fig. 45), and the remaining groups comprising a Phaseoleae sens. lat. clade. The rbcL phylogeny of Kajita et al. (2001) and the ITS analysis of Hu et al. (2002) are equivocal as to which clade subtribe Clitoriinae belongs. Phaseoleae sens. lat. also includes two traditionally independent tribes, the Desmodieae and Psoraleeae. Delimiting a recircumscribed Phaseoleae sens. strict is thus very problematic. A solution may be to recognise a broad tribe Phaseoleae, comprising the subtribes Kennediinae, Cajaninae, Phaseolinae and Glycininae, assorted basally branching genera, and tribes Desmodieae and Psoraleeae (both treated at subtribal level).

    [FTEA]

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

    Habit
    Perennial twining herbs; rootstock possibly tuberous
    Leaves
    Leaves pinnately 3-foliolate; stipules and stipels present
    Flowers
    Flowers in small axillary 4–10 (–20)-flowered clusters on reduced side branches often appearing when the plant is quite leafless
    Calyx
    Calyx appearing 4-lobed, the upper pair of lobes united into a low rounded lip
    Corolla
    Corolla medium-sized; standard oblate, reflexed, glabrous, only slightly auriculate; appendages 2 or obsolete; wings obovate-oblong; keel incurved through 360°, the beak twisted
    Stamens
    Vexillary stamen free; anthers ± uniform
    Pistil
    Ovary linear, ± 9–14-ovuled; style consisting of two parts, an apical, thickened, strongly curved glabrous part and a tenuous flexible basal part of approximately equal length; stigma capitate, terminal, surrounded by a ring of branched or simple hairs
    Fruits
    Pods linear, almost straight, not septate
    Seeds
    Seeds oblong or narrowly oblong, compressed; rim-aril scarcely to slightly developed but a small cartilaginous funicle-remnant persistent.
    [FZ]

    Leguminosae, B. Mackinder, R. Pasquet, R. Polhill & B. Verdcourt. Flora Zambesiaca 3:5. 2001

    Habit
    Perennial twining herbs; rootstock usually tuberous.
    Leaves
    Leaves pinnately 3-foliolate; leaflets sometimes lobed; stipules and stipels present.
    Flowers
    Flowers in small axillary 4–10(20)-flowered clusters on reduced side branches or swollen or elongated nodes of the inflorescence rhachis, often appearing when the plant is quite leafless; bracteoles foliaceous (sometimes large outside the Flora Zambesiaca area), deciduous.
    Calyx
    Calyx appearing 4- or 5-lobed, the upper pair of lobes united into a low rounded or notched lip.
    Corolla
    Corolla medium sized; standard oblate, reflexed, glabrous, only slightly auriculate with appendages 2 or obsolete; wings obovate-oblong; keel incurved through 360°, the beak twisted.
    Stamens
    Vexillary stamen free; anthers ± uniform.
    Pistil
    Ovary linear, c. 9–16-ovuled; style consisting of two parts, an apical, thickened, strongly curved glabrous part and a tenuous flexible basal part of approximately equal length; stigma capitate, terminal, surrounded by a ring of branched or simple hairs.
    Fruits
    Pods linear, almost straight, not septate.
    Seeds
    Seeds oblong or narrowly oblong, compressed; rim aril scarcely to slightly developed but a small persistent cartilaginous funicle remnant.
    [LOWO]
    Use
    Seeds and tubers said to be edible

    Images

    Distribution

    Native to:

    Botswana, Cape Provinces, KwaZulu-Natal, Madagascar, Malawi, Mozambique, Namibia, Northern Provinces, Swaziland, Tanzania, Zambia, Zimbabwe

    Decorsea R.Vig. appears in other Kew resources:

    First published in Notul. Syst. (Paris) 14: 181 (1952)

    Accepted by

    • Govaerts, R. (2000). World Checklist of Seed Plants Database in ACCESS D: 1-30141.

    Literature

    Flora Zambesiaca
    • Verdcourt in Kew Bull. 24: 390, 442 (1970).
    • in Notul. Syst. (Paris) 14: 181 (1952).
    Flora of Tropical East Africa
    • in Not. Syst., Paris, 14: 181 (1952)

    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