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  1. Family: Acanthaceae Juss.
    1. Sclerochiton Harv.

      1. This genus is accepted, and its native range is Tropical & S. Africa.


    Acanthaceae (part 1), Kaj Vollesen, Flora of Tropical East Africa, 2008

    Shrubs or small trees.
    Leaves opposite, anisophyllous, apex usually drawn out into an obtuse tip, base usually attenuate and decurrent on petiole.
    Flowers in usually terminal racemiform cymes or solitary, usually supported by bracts; rachis flattened; bracts glumaceous or the lower foliaceous, usually caducous, usually not imbricate; bracteoles 2, large, glumaceous, midrib often thickened and bony at base.
    Calyx large, divided to the base in 5 many-veined glumaceous sepals which are thickened and horny at base; ventral and lateral sepals subequal, 1-toothed, dorsal broader and usually longer, 1–5-toothed apically.
    Corolla tube wide, usually shorter than limb, glabrous, constricted at insertion of stamens, below insertion with band of downwardly directed hairs; limb split dorsally to give a single broad 5-lobed lower lip, below glabrous or hairy, above usually with central glabrous band flanked by two bands of stiff bulbous-based retrorsely directed hairs, these becoming shorter outwards; lobes oblong, broadly rounded.
    Stamens 4, inserted just inside tube on top of a broad thickened flange; filaments bony, flattened, subequal; anthers elliptic to oblong, exserted, 1-thecous, usually bearded, usually with a small thorn near base.
    Ovary glabrous, with broad annular disk at bas; style usually glabrous, bent near tip; stigma with two subequal acute lobes.
    Capsule 4-seeded, woody, sessile, ellipsoid, usually glabrous; valves with distinct dorsal furrow.
    Seed discoid, irregularly ovate-triangular in outline, with concentric ridges or rings of large pectinate scales.
    Range: 19 species in tropical and South Africa.
    In some species (e.g. S. bequaertii) one of the two leaves of a pair is constantly reduced to a small orbicular prophyll-looking leaf. In other species (e.g. S. vogelii subsp. holstii) this condition is seen in some specimens while in others there is only a slight difference. The leaves of all species of Sclerochiton are anisophyllous to a smaller or larger degree. In most species this latter condition is the norm.



    Native to:

    Angola, Cameroon, Cape Provinces, Congo, Gabon, Ghana, Guinea, Gulf of Guinea Is., Ivory Coast, Kenya, KwaZulu-Natal, Liberia, Malawi, Mozambique, Northern Provinces, Rwanda, Sierra Leone, Swaziland, Tanzania, Uganda, Zambia, Zaïre, Zimbabwe

    Accepted Species


    Other Data

    Sclerochiton Harv. appears in other Kew resources:


    First published in London J. Bot. 1: 27 (1842)


    Flora of West Tropical Africa

    • —F.T.A. 5: 109.

    Flora of Tropical East Africa

    • K.B. 46: 7 (1991)
    • F.T.A. 5: 109 (1899)
    • E. & P. Pf. IV, 3b: 316 (1895)
    • G.P. 2: 1090 (1873)
    • DC., Prodr. 11: 279 (1847)
    • London Journ. Bot. 1: 27 (1842)


    Flora of Tropical East Africa
    Flora of Tropical East Africa

    Kew Backbone Distributions
    The International Plant Names Index and World Checklist of Selected Plant Families 2020. Published on the Internet at and
    © Copyright 2017 World Checklist of Selected Plant Families.

    Kew Names and Taxonomic Backbone
    The International Plant Names Index and World Checklist of Selected Plant Families 2020. Published on the Internet at and
    © Copyright 2017 International Plant Names Index and World Checklist of Selected Plant Families.