1. Family: Acanthaceae Juss.
    1. Genus: Barleria L.
      1. Species: Barleria elegans S.Moore ex C.B.Clarke
        1. Barleria elegans subsp. orientalis I.Darbysh.

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

    [FZ]

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

    Diagnostic
    subsp. nov. Differs from subsp. elegans in having white, not lilac or blue, flowers and in the external surface of the calyx having only a strigose indumentum, not both strigose and (sparsely) rather densely glandular- and/or eglandular-puberulous.
    Habit
    Perennial herb or subshrub, often straggling or scandent, 40–150 cm tall; stems sparsely strigose, with two opposite lines of short white retrorse hairs, later glabrescent.
    Leaves
    Leaves (ovate-)elliptic to narrowly so, (3.7)5-10 × 1.5–3.5 cm, base (cuneate-)attenuate, apex attenuate to obtuse, apiculate or upper leaves mucronate, surfaces strigose, hairs most numerous on or restricted to midrib, margin and veins beneath; lateral veins (4)5–6 pairs; petiole to 12 mm long.
    Inflorescences
    Inflorescence axillary, a contracted unilateral cyme 1.5–4 cm long, 3–14-flowered; bracteoles green, (linear-)lanceolate, 12–23 × 2–5 mm long excluding the 3–7 lateral spines each 2–6.5 mm, apex spinose, triplinerved with pale prominent midrib, often with few broad sessile glands towards base; paired sterile bracteoles often present at lower nodes.
    Calyx
    Calyx green, sometimes with paler margin, later turning pale-scarious; anterior lobe elliptic or elliptic-lanceolate, 11–17.5 × 3.5–7 mm, base attenuate, margin with 4–9 slender lateral spines 3–6.5 mm long ending in a short bristle, apex spinose or bispinose, surface sparsely strigose; posterior lobe as anterior but 12.5–23 × 4–9 mm, marginal spines to 9 mm long, apex attenuate-spinose; lateral lobes linear-lanceolate, 6.5–10 mm long.
    Corolla
    Corolla 32–42 mm long, white, eglandular-pubescent externally; tube 17–25 mm long, cylindrical, narrowly campanulate towards mouth; limb in weak 4+1 arrangement or subregular; abaxial and lateral lobes 10–15 × 6–10 mm, abaxial offset by 2–4.5 mm; adaxial lobes somewhat narrower, 6–8 mm wide.
    Stamens
    Stamens attached 9–12 mm from base of corolla tube; filaments 18–21 mm long; anthers 2.5–3.5 mm long; lateral staminodes 3–5.5 mm long, pubescent, antherodes 0.7–1.1 mm long.
    Ovary
    Ovary with ring of minute crisped white hairs at apex; style glabrous; stigma linear, 0.4–0.9 mm long.
    Fruits
    Capsule 13–16.5 mm long, glabrous.
    Seeds
    Seeds 4.5–5 mm long and wide.
    Distribution
    Also in Swaziland and South Africa (KwaZulu-Natal, Limpopo, Mpumalanga).
    Ecology
    Drier types of riverine forest, woodland and Acacia–Combretum thicket, coastal bushland, sometimes between exposed rocks, can persist in disturbed bushland; 0–550 m.
    Conservation
    Conservation notes: Although losses of riparian habitat are likely to have led to some population declines, it remains locally common in suitable habitat; Least Concern.

    Distribution

    Native to:

    KwaZulu-Natal, Mozambique, Northern Provinces, Swaziland, Zimbabwe

    Barleria elegans subsp. orientalis I.Darbysh. appears in other Kew resources:

    First published in Fl. Zambes. 8(6): 45 (2015)

    Accepted by

    • Darbyshire, I., Vollesen, K. & Kelbessa, E. (2015). Flora Zambesiaca 8(6): 1-314. Royal Botanic Gardens, Kew.

    Literature

    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