1. Family: Acanthaceae Juss.
    1. Genus: Barleria L.
      1. Barleria capitata Klotzsch

        This species is accepted, and its native range is S. Tropical Africa to Caprivi Strip.

    [FZ]

    Flora Zambesiaca Acanthaceae (part 2) by Iain Darbyshire, Kaj Vollesen and Ensermu Kelbessa

    Habit
    Spiny subshrub with spreading, decumbent or subprostrate branches 20–70 cm long; stems with dense short white antrorse or mixed antrorse and retrorse hairs, interspersed with a few subappressed long pale hairs.
    Leaves
    Leaves often clustered on short lateral branches, elliptic or oblanceolate, 1.8–4 × 0.5–1.3 cm, base cuneate or attenuate, apex acute or obtuse, mucronate, surfaces with pale coarse (sub)appressed hairs most numerous on veins beneath, young leaves also with minute curled white hairs; lateral veins 3–4 pairs; petiole to 6 mm long.
    Inflorescences
    Inflorescences contracted unilateral cymes 3–7 cm long in upper axils, 3–10+-flowered, axis usually inrolled at maturity; bracteole pairs unequal, the larger held erect or horizontal, lanceolate, 18–30 × 5–11 mm, asymmetric and falcate, margin with numerous slender flexuose spines, apex spinose, midrib pale and prominent, smaller bracteoles declinate; reduced sterile pale-scarious bracteoles present at lower nodes, lanceolate or ovate, 6–15 × 1.5–5 excluding lateral spines.
    Calyx
    Calyx tardily scarious; anterior lobe broadly ovate, 28–32 × 15–16 mm, base rounded or cordate, margin with ± numerous spreading bristles thickened at maturity and forming slender teeth, apex acute, surface with sparse ascending or spreading hairs along veins and minute white curled hairs, at least when young; posterior lobe 32–42 × 21–23 mm long, apex shortly spinose, surface with conspicuous flexuose submarginal spines 3–5.5 mm long; lateral lobes subulate, 14–17 mm long, apex acute to rounded, surface with long subappressed hairs especially along margin and scattered short glandular hairs.
    Corolla
    Night flowering; corolla white (drying blue-black), glandular-pilose externally, limb with shorter eglandular hairs; tube narrowly cylindrical, (80)100–130 mm long; limb subregular, lobes 13–23 × 10–18 mm or adaxial lobes somewhat smaller.
    Stamens
    Stamens attached in distal third of corolla tube; filaments 31–35 mm long; anthers shortly exserted, 4–5 mm long; lateral staminodes 0.7–3.5 mm long, pilose, antherodes to 0.7 mm long or obsolete.
    Ovary
    Ovary shortly pubescent towards apex, with apical ring of minute crisped hairs; style puberulous towards base; stigma subcapitate, 0.5–0.8 mm long.
    Fruits
    Capsule c.21 mm long, antrorse-puberulous towards apex.
    Seeds
    Seeds c.6.5 × 6 mm.
    Distribution
    Not known elsewhere.
    Ecology
    Woodland and wooded grassland with e.g. mopane, Acacia and Combretum, open grassland, often on rocky hillslopes, and roadsides; 100–1100 m.
    Conservation
    Conservation notes: Endemic to the Flora area and widespread, but rather scarce and scattered with few collections despite the highly conspicuous flowers and inflorescence; probably Least Concern.

    Distribution

    Native to:

    Botswana, Caprivi Strip, Malawi, Mozambique, Zambia, Zimbabwe

    Barleria capitata Klotzsch appears in other Kew resources:

    First published in W.C.H.Peters, Naturw. Reise Mossambique 6(1): 210 (1861)

    Accepted by

    • Darbyshire, I., Tripp, E.A. & Chase, F.M. (2019). A taxonomic revision of Acanthaceae tribe Barlerieae in Angola and Namibia. Part 1 Kew Bulletin 74(5): 1-85. Royal Botanic Gardens, Kew.
    • Darbyshire, I., Vollesen, K. & Kelbessa, E. (2015). Flora Zambesiaca 8(6): 1-314. Royal Botanic Gardens, Kew.
    • Govaerts, R. (1996). World Checklist of Seed Plants 2(1, 2): 1-492. MIM, Deurne.

    Literature

    Flora Zambesiaca
    • —Clarke in F.T.A. 5: 153 (1899), in part excl. Schweinfurth 1071 from Eritrea.
    • in Peters, Naturw. Reise Mossamb. 6(1): 210 (1861).
    Kew Backbone Distributions
    • Darbyshire, I., Vollesen, K. & Kelbessa, E. (2015). Flora Zambesiaca 8(6): 1-314. Royal Botanic Gardens, Kew.

    Sources

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

    Kew Backbone Distributions
    The International Plant Names Index and World Checklist of Selected Plant Families 2019. 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 2019. 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