1. Family: Acanthaceae Juss.
    1. Genus: Barleria L.
      1. Barleria lanceolata (Schinz) Oberm.

        This species is accepted, and its native range is SW. Botswana to Namibia.

    [FZ]

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

    Habit
    Spiny shrublet 15–100 cm tall; stems with short white retrorse hairs restricted to or concentrated in two opposite lines or bands, young stems sparsely strigose, sometimes with scattered minute spreading glandular hairs.
    Leaves
    Leaves oblanceolate, spathulate or narrowly oblong-elliptic, 1.2–4 × 0.4–0.8 cm, base cuneate, apex acute to rounded, mucronate, strigose mainly on margin and veins beneath, young leaves often with short white retrorse hairs at least on midrib above; lateral veins 3–4 pairs; petiole to 5 mm.
    Inflorescences
    Inflorescence a contracted unilateral cyme 1–3 cm long in upper axils, each 2–7-flowered; bracteoles linear-lanceolate, pairs unequal in length, the longer 7–20 × 0.8–1.8 mm, usually with a narrow green blade and a prominent pale midrib, apex spinose, margin with 1–11 lateral teeth or spines to 1–3.5 mm long, sterile bracteoles sometimes present at lower nodes as paired axillary spines.
    Calyx
    Calyx at first bluish, maturing green with darker, often reddish venation, soon turning pale-scarious; anterior lobe broadly ovate, 13–17 × 8.5–11.5(16) mm, base abruptly narrowed and rounded or subcordate, margin entire or with minute bristle-tipped teeth, apex shortly attenuate to obtuse and with a short mucro, rarely notched, surface strigose along veins, with short white retrorse hairs mainly towards base, with or without minute patent glandular hairs; posterior lobe as anterior but 14–19 mm long, apex with a more prominent mucro; lateral lobes lanceolate, 5–9 mm long.
    Corolla
    Corolla 25–42 mm long, lilac, pink, pale blue or rarely white, eglandular-pubescent externally with interspersed glandular hairs on lateral lobes; tube 15–25 mm long, cylindrical, barely widened or narrowly campanulate towards mouth; limb subregular; abaxial lobe 9–15.5 × 5–13.5 mm; lateral lobes 9.5–16.5 × 4–10 mm; adaxial lobes as laterals but 3–7.5 mm wide.
    Stamens
    Stamens attached 9–13.5 mm from base of corolla tube; filaments 13–27 mm long; anthers 2–2.6(2.9) mm long; lateral staminodes 1.3–4 mm long, pubescent towards base, antherodes 0.7–1 mm long.
    Ovary
    Ovary with ring of minute crisped white hairs at apex; style glabrous; stigma clavate, 0.5–0.8 mm long.
    Fruits
    Capsule 10.5–12 mm long, glabrous or with few hairs towards apex.
    Seeds
    Seeds 3.5–4 × 3.4–3.7 mm.
    Distribution
    Also in Namibia.
    Ecology
    Thin clay over quartzite and rocky ground with wooded and shrubby grassland; in Namibia in open bushland and sparse grassland on sandy soils or rocky ground, usually in full sun; 1050 m.
    Conservation
    Conservation notes: Although known only from a single collection in the Flora area, it is fairly common and widespread in Namibia; Least Concern.

    Distribution

    Native to:

    Botswana, Namibia

    Barleria lanceolata (Schinz) Oberm. appears in other Kew resources:

    First published in Ann. Transvaal Mus. 15: 155 (1933)

    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
    • —Meyer in Merxmüller, Prodr. Fl. SW Afr. 130: 14 (1968).
    • in Ann. Transv. Mus. 15: 155 (1933).
    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