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This species is accepted, and its native range is SE. Botswana to Eswatini.
A specimen from Kew's Herbarium

[FZ]

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

Morphology General Habit
Compact spiny subshrub 20–50 cm tall.
Morphology Stem
Stems white-puberulous when young, hairs concentrated on two opposite sides or more widespread, later glabrescent; base of stems woody and often stout.
Morphology General Spines
Axillary spines 2-4(6)-rayed, stalk 0–2 mm long, longest ray (5.5)9–18.5 mm long.
Morphology Leaves
Leaves somewhat coriaceous, narrowly oblong or oblanceolate, 2.7–6.3 × 0.8–1.7 cm, base cuneate, apex acute or lower pairs more rounded, mucronate, margin and veins beneath strigulose when young, later glabrescent, broad sessile glands ± numerous towards base beneath; petiole 0-5 mm.
Morphology Reproductive morphology Inflorescences
Inflorescence axillary, flowers solitary, sometimes clustered towards stem apex, sessile; bracts foliaceous, often with more numerous and conspicuous sessile glands towards base; bracteoles whitish, spinose, 11.5–18.5 × 1.5–2.5 mm.
Morphology Reproductive morphology Flowers Calyx
Outer calyx lobes subequal, lanceolate, 10.5–15 × 3–5 mm, long-attenuate into apical spine, anterior lobe sometimes bifid, surface and margin sparsely strigulose or glabrescent, with scattered broad sessile glands, 2 (anterior) or 1 (posterior) veins prominent; lateral lobes 9–12 mm long.
Morphology Reproductive morphology Flowers Corolla
Corolla 29–34 mm long, yellow, glabrous externally or with sparse short hairs on tube; tube 10.5–13 mm long; limb in 4+1 arrangement; abaxial lobe offset by 4–6 mm, this and lateral lobes 12–16 × 7–12 mm; adaxial lobes 6–9.5 mm wide.
Morphology Reproductive morphology Flowers Androecium Stamens
Stamens with filaments 15-17.5 mm long, shortly pubescent; anthers 3.5–4.7 mm long; lateral staminodes 1–1.5 mm, pilose, antherodes 1–1.2 mm.
Morphology Reproductive morphology Flowers Gynoecium Ovary
Ovary glabrous; stigma linear, 1.5–2 mm long.
Morphology Reproductive morphology Fruits
Capsule 13–17 mm long, glabrous.
Morphology Reproductive morphology Seeds
Seeds 7–8 × 5.5–6.5 mm.
Distribution
Also in N South Africa (Limpopo and Gauteng) and Swaziland.
Ecology
Elsewhere in dry Acacia bushland, on limestone ridges and roadsides; c.1000 m.
Conservation
Conservation notes: Very localised and apparently scarce, known from few herbarium collections but appears tolerant of some disturbance. Galpin (13396) recorded it as "steadily spreading with overstocking and become a pest" near Naboomspruit, South Africa; probably Least Concern.

[KBu]

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. https://doi.org/10.1007/s12225-018-9791-0

Morphology General Habit
Compact spiny subshrub, 5 – 50 cm tall; stems with variable internode length, sometimes with many contracted internodes and spiny nodes; branches 4-angular, white-puberulous and sometimes strigulose when young, hairs concentrated on two opposite sides or more widespread, later glabrescent; mature stems soon becoming woody and stout, with grey bark
Morphology General Spines
Axillary spines white, 2 – 4 (– 6)-rayed, stalk 0 – 2.5 mm long, longest ray 5 – 23.5 mm long, straight
Morphology Leaves
Leaves often held ± erect at least towards apex of stems, sessile or petiole to 6 mm long; blade somewhat coriaceous, narrowly oblong or oblanceolate, 2.5 – 7.3 × 0.8 – 2.2 cm (l:w ratio (2.6 –) 2.8 – 4.6:1), base cuneate or attenuate, margin entire, apex acute to rounded, mucronate, young leaves with few to numerous appressed short white hairs, these later sparse and mainly along margin and veins beneath or glabrescent, broad sessile glands ± numerous towards base beneath; lateral veins 3 – 5 pairs
Morphology Reproductive morphology Flowers Androecium Stamens
Stamens inserted 7 – 9 mm from base of corolla tube, filaments 15 – 26 mm long, shortly pubescent; anthers (3 –) 3.5 – 6 mm long; lateral staminodes 1 – 1.7 mm long, pilose, antherodes 0.4 – 1.2 mm long
Morphology Reproductive morphology Flowers Calyx
Calyx (greenish-) white, anterior and posterior lobes subequal, lanceolate, anterior lobe 10.5 – 15 (– 20) × 3 – 5 mm, posterior lobe 11 – 16 (– 22) mm long, both long-attenuate into apical spine, anterior lobe sometimes bifid, margin entire, external surfaces and margins sparsely strigulose or glabrescent, with scattered broad sessile glands, 2 (anterior) or 1 (posterior) vein(s) prominent; lateral lobes linear-lanceolate, 9 – 13 mm long
Morphology Reproductive morphology Flowers Corolla
Corolla yellow or pale orange, 29 – 48 mm long, glabrous externally or tube with short hairs; tube cylindrical, 10.5 – 16 mm long; limb in “4+1” configuration; abaxial lobe offset by 4 – 10 mm, this and lateral lobes broadly (ovate-) elliptic or obovate, 12 – 20 × 7 – 13 mm, apices acute, attenuate or rounded with minute acumen; adaxial lobes narrower, 6 – 9 mm wide
Morphology Reproductive morphology Flowers Gynoecium Pistil
Pistil glabrous; stigma linear, 1 – 2 mm long
Morphology Reproductive morphology Fruits
Capsule 13 – 17.5 mm long, glabrous; seeds 7 – 8 × 5.5 – 6.5 mm.
Morphology Reproductive morphology Inflorescences
Inflorescences axillary but sometimes clustered towards stem apices to form loose leafy spikes; flowers solitary at each axil, sessile; bracts foliaceous, often with more numerous and conspicuous sessile glands towards base; bracteoles white, spinose, (8 –) 11 – 27 × 1 – 2.5 mm, margin entire
Type
South Africa, near Zebedeli’s Kraals, Inkumpi R., fl. & fr., without date, Nelson 370 (holotype PRE; isotype K! [K000394539]).

Native to:

Botswana, Namibia, Northern Provinces, Swaziland

Barleria coriacea Oberm. appears in other Kew resources:

Date Reference Identified As Barcode Type Status
Nov 8, 1933 Nelson, W. [400], South Africa K000394538 paratype
Nov 8, 1933 Nelson, W. [370], South Africa K000394539 isotype

First published in Ann. Transvaal Mus. 15: 139 (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.

Not accepted by

  • Govaerts, R. (1996). World Checklist of Seed Plants 2(1, 2): 1-492. MIM, Deurne. [Cited as Barleria prionitis.]

Literature

Kew Bulletin

  • Clarke, C. B. (1901). Barleria. In: W. T. Thiselton-Dyer (ed.), Flora Capensis. Vol. 5 (Pt. 1): 44 – 55 . L. Reeve & Co., London.
  • Compton, R. H. (1976). The Flora of Swaziland. J. South African Bot., Suppl. Vol. 11.
  • Darbyshire, I. (2015). Barleria. In: J. R. Timberlake & E. S. Martins (eds), Flora Zambesiaca. Vol. 8 (6): 37 – 122. Royal Botanic Gardens, Kew.
  • Obermeyer, A. A. (1933). A revision of the South African species of Barleria. Ann. Transvaal Mus. 15: 123 – 180.

Flora Zambesiaca

  • in Ann. Transv. Mus. 15: 139 (1933).
  • —Compton, Fl. Swaziland: 552 (1976).

Kew Backbone Distributions

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

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

Herbarium Catalogue Specimens
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 2021. 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 Bulletin
Kew Bulletin
http://creativecommons.org/licenses/by-nc-sa/3.0

Kew Names and Taxonomic Backbone
The International Plant Names Index and World Checklist of Selected Plant Families 2021. 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