1. Family: Acanthaceae Juss.
    1. Genus: Barleria L.
      1. Barleria macrostegia Nees

        This species is accepted, and its native range is Zimbabwe to S. Africa.

    [FZ]

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

    Habit
    Perennial herb with much-branched prostrate stems 15–50 cm long from a woody base; stems with short white retrorse hairs often in two opposite rows, and few to numerous ± spreading yellowish hispid hairs.
    Leaves
    Leaves often clustered on short lateral branches, narrowly oblong, (ovate-)elliptic or lanceolate, 0.8–3 × 0.3–0.7(1) cm, base cuneate, margin thickened and pale, apex acute, mucronate, yellowish-hispid on margin and midrib beneath, hairs along margin with ± bulbous base forming minute serrations; lateral veins indistinct, midrib prominent beneath; petiole 0–4 mm long.
    Inflorescences
    Inflorescence a dense cylindrical or subglobose unilateral cymes 2–7.5 cm long in the upper axils, 4–10+-flowered; axis sometimes inrolled at fruiting; bracteoles imbricate, largely enclosing calyx, green, sometimes with white margin, ± broadly ovate, (15)20–32 × (7)10–20 mm, margin entire or minutely toothed due to swollen hair bases, apex spinulose, surface tripli- or palmately nerved, hispid along main veins and margin; paired reduced sterile bracteoles sometimes present at lower nodes.
    Calyx
    Calyx green or mauve-tinged, later scarious, accrescent; anterior lobe suborbicular or somewhat ovate or elliptic, 15–21 × 10–17 mm in flower, up to 25 × 28 mm in fruit, base rounded or subcordate, margin entire or with minute teeth formed by swollen hair bases, apex obtuse, rounded or subattenuate and mucronulate, rarely bi-mucronulate, surface yellowish-hairy with softer hairs than leaves, dense along margin; posterior lobe as anterior but broadly ovate(-orbicular), 17–26 × 11–18 mm in flower, to 33 × 29 mm in fruit, apex attenuate to obtuse, spinulose; lateral lobes lanceolate, 7–9 mm long in flower, to 11.5 mm in fruit.
    Corolla
    Corolla 31–42 mm long, pale blue to purple with whitish tube, rarely white throughout, glandular-pilose externally; tube cylindrical, 18–28 mm long, somewhat expanded towards mouth; limb subregular; lobes 9–15 mm long, abaxial and lateral lobes 5–9.5 mm wide, adaxial lobes 4–7.5 mm wide.
    Stamens
    Stamens attached 12.5–18 mm from base of corolla tube; filaments 8–12.5 mm long; anthers held at mouth or shortly exserted, 2–2.8 mm long; lateral staminodes 1–3 mm long, pubescent at base, antherodes 0.3–1.3 mm long or absent.
    Ovary
    Ovary with apical ring of minute crisped hairs extending onto style base; stigma broadly capitate, 0.6–1.2 mm wide.
    Fruits
    Capsule 14.5–17 mm long, glabrous.
    Seeds
    Seeds 5–5.5 × 5.5–6 mm.
    Distribution
    Also in Namibia and South Africa (Northern Cape, Free State, North West, Gauteng, Limpopo, Mpumalanga).
    Ecology
    Bare ground, grassland, open wooded grassland on sandy soils, often in disturbed areas such as roadsides, pathways and fallow land; 900–1250 m.
    Conservation
    Conservation notes: Widespread and fairly common; Least Concern.

    Images

    Distribution

    Native to:

    Botswana, Cape Provinces, Free State, Namibia, Northern Provinces, Zimbabwe

    Barleria macrostegia Nees appears in other Kew resources:

    Date Reference Identified As Barcode Type Status
    Dec 23, 1899 Burke [451], South Africa K000394588 isolectotype
    Dec 23, 1899 Burke [457], South Africa K000394589 lectotype
    Burke [s.n.], South Africa K000394587 holotype
    Burchell, W.J. [2386], KwaZulu-Natal Barleria media K000794965 holotype

    First published in A.P.de Candolle, Prodr. 11: 235 (1847)

    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
    • —Fabian & Germishuizen, Wild Fl. Nthn. S. Afr.: 386, pl.185 (1997).
    • in Merxmüller, Prodr. Fl. SW Afr. 130: 16 (1968).
    • —Meyer in Mitt. Bot. Staatssamml. München 2: 382 (1957).
    • —Obermeijer in Ann. Transv. Mus. 15: 159 (1933).
    • —Clarke in Fl. Cap. 5: 50 (1901).
    • in De Candolle, Prodr. 11: 235 (1847).
    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

    Herbarium Catalogue Specimens
    'The Herbarium Catalogue, Royal Botanic Gardens, Kew. Published on the Internet http://www.kew.org/herbcat [accessed on Day Month Year]'. Please enter the date on which you consulted the system.
    Digital Image © Board of Trustees, RBG Kew http://creativecommons.org/licenses/by/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