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This species is accepted, and its native range is S. Mozambique to S. Africa.
A specimen from Kew's Herbarium

[FZ]

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

Morphology General Habit
Spiny compact shrublet to sprawling or subscandent perennial herb, 30–90 cm tall; stems sparsely strigose, with numerous fine white retrorse or spreading hairs evenly distributed or restricted to two opposite sides, nodes strigose.
Morphology Leaves
Leaves oblong, elliptic or somewhat ovate to obovate, 1.2–3(4.7) × 0.6–1.5(2) cm, base cuneate, attenuate or obtuse, apex acute to rounded with ± prominent mucro, surfaces strigose, hairs most numerous on margin and veins beneath; lateral veins 3–4(5) pairs; petiole to 5 mm.
Morphology Reproductive morphology Inflorescences
Inflorescence axillary, a contracted unilateral cyme 1–3.5 cm long, each (1)3–10-flowered; bracteoles green, linear-lanceolate or lanceolate, pairs unequal, the longer 6–17 × 1–3.5 mm excluding the (1)2–6 lateral spines to 1–5 mm, apex spinose, midrib pale and prominent, sterile pairs sometimes persisting at lower nodes.
Morphology Reproductive morphology Flowers Calyx
Calyx at first pale green or pinkish with dark green or purple venation, later turning pale brown-scarious; anterior lobe elliptic or ovate, 8–17(20) × 3.5–8 mm, base shortly attenuate or rarely obtuse, margin with 4–8 slender lateral spines 1.5–5 mm long ending in a short bristle, apex spinose, surface strigose along veins, often with short spreading glandular hairs on spines; posterior lobe ovate or lanceolate, 10–22 × 4.5–10.5 mm, marginal spines to 6 mm long, apex attenuate into a long spine; lateral lobes linear-lanceolate, 3.5–10 mm long.
Morphology Reproductive morphology Flowers Corolla
Corolla (chasmogamous flowers) 27–39 mm long, pale pink, lilac or (blue-)mauve, sometimes white-flowered plants within a population, eglandular-pubescent and glandular-pilose externally; tube 16.5–25 mm long, cylindrical, narrowly campanulate towards mouth; limb in weak 2+3 arrangement or subregular; abaxial lobe 11–14 × 5.5–7.5 mm; lateral lobes 10–13 × 4.5–8.5 mm; adaxial lobes 9–12.5 × 3–5 mm; cleistogamous flowers sometimes present, appearing as cylindrical buds.
Morphology Reproductive morphology Flowers Androecium Stamens
Stamens attached 10–11 mm from base of corolla tube; filaments 15–18 mm long; anthers (1.7)2–2.4 mm long; lateral staminodes 1.5–2.5 mm long, pubescent, antherodes c.0.7 mm long.
Morphology Reproductive morphology Flowers Gynoecium Ovary
Ovary with ring of few crisped white hairs at apex; style glabrous; stigma linear, 0.35–0.7 mm long.
Morphology Reproductive morphology Fruits
Capsule 10–13.5 mm long, glabrous.
Morphology Reproductive morphology Seeds
Seeds 3.5–4.5 mm long and wide.
Distribution
Also in Swaziland and South Africa (KwaZulu-Natal, Limpopo, Mpumalanga).
Ecology
Dry rocky hills or sandy plains, dry bushland in full sun or shade, also riverine bushland, roadside slopes and cliff ledges; c.100 m.
Conservation
Conservation notes: Known only from a single collection in the Flora area, but locally abundant in N South Africa where it can be the dominant undershrub in open bushland – Meeuse 10203 states it is "very frequent and aspect-forming for miles"; Least Concern.

Native to:

KwaZulu-Natal, Mozambique, Northern Provinces, Swaziland

Barleria saxatilis Oberm. appears in other Kew resources:

Date Reference Identified As Barcode Type Status
Jan 1, 1992 Meeuse, A.D.J. [10203], South Africa K000794966 isotype

First published in Bothalia 7: 445 (1961)

Accepted by

  • 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

  • in Bothalia 7: 445 (1961).
  • —Compton, Fl. Swaziland: 554 (1976).
  • —Fabian & Germishuizen
  • —Makholela et al. in S. Afr. J. Bot. 70: 515 (2004).
  • —Pooley, Field Guide Wild Fl. KwaZulu-Natal: 490 (1998).

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 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