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This species is accepted, and its native range is Angola to NW. Namibia.
A specimen from Kew's Herbarium

[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
Spiny perennial herb or subshrub, often straggling, 40 – 150 (– 300) cm tall; stems sparsely strigose, with or without two opposite lines of short white retrorse hairs when young, later glabrescent
Morphology Leaves
Leaves sometimes absent at flowering / fruiting, blade papery, (ovate-) elliptic to narrowly so, (3.4 –) 4 – 13 × (1.5 –) 2 – 5 cm (l:w ratio 1.9 – 3:1), base attenuate, cuneate or uppermost leaves obtuse, margin entire, apex obtuse to acuminate, apiculate or uppermost leaves mucronulate, surfaces strigose, hairs most numerous on or restricted to midrib, margin and veins beneath; lateral veins (4 –) 5 – 9 pairs; petiole to 25 mm long
Morphology Reproductive morphology Flowers Androecium Stamens
Stamens inserted 9 – 12 mm from base of corolla tube; filaments 16 – 23.5 mm long; anthers 2.1 – 3.6 mm long; lateral staminodes 1.5 – 5.5 mm long, pubescent or sparsely so, antherodes 0.5 – 1.3 mm long
Morphology Reproductive morphology Flowers Calyx
Calyx green or brown-green, sometimes with paler margin, tardily turning pale-scarious; anterior lobe elliptic or elliptic-lanceolate, 9.5 – 17.5 × 3.5 – 7 mm, margin with 4 – 9 flexuose lateral spines per side 1.2 – 6.5 mm long ending in a short bristle, apex spinose or bispinose, external surface sparsely strigose, sometimes also sparsely to densely glandular- and/or eglandular-puberulous; posterior lobe like anterior lobe but 11 – 23 × 4 – 9 mm, marginal spines up to 9 mm long, apex attenuate-spinose; lateral lobes linear-lanceolate, 6.5 – 13.5 mm long
Morphology Reproductive morphology Flowers Corolla
Corolla (22 –) 27 – 44 mm long, white, lilac, bluish or mauve, eglandular-pubescent externally, with or without few glandular hairs on limb; tube 14 – 25 mm long, cylindrical, narrowly widened towards mouth; limb in weak “4+1” configuration or subregular; abaxial lobe offset by 1 – 4.5 mm, obovate or rounded, 8 – 18 × 6 – 12.5 mm, apex rounded, obtuse or shallowly emarginate; lateral lobes as abaxial lobe but elliptic or obovate, 5.7 – 9.5 mm wide, apex rounded to subattenuate; adaxial lobes narrower, 4.5 – 8 mm wide
Morphology Reproductive morphology Flowers Gynoecium Ovary
Ovary with a ring of minute crisped white hairs at attachment point of style; style glabrous; stigma linear or clavate, 0.4 – 0.9 mm long
Morphology Reproductive morphology Fruits
Capsule 4-seeded, (11 –) 13 – 16.5 mm long, glabrous or with white ascending hairs towards apex; seeds 4.2 – 5 mm long and wide.
Morphology Reproductive morphology Inflorescences
Inflorescences axillary, contracted unilateral cymes, 1.5 – 6 cm long, (3 –) 5 – 20-flowered; bracteoles green, (linear-) lanceolate, (9 –) 11 – 23 × 2 – 5 mm excluding the (1 –) 3 – 8 prominent marginal spines per side, each 1 – 6.5 mm long, apex spinose, surface tripliveined with pale prominent midrib, often with scattered broad sessile glands towards base, surfaces sometimes glandular- and/or eglandular-puberulous; paired sterile bracteoles sometimes present at lower nodes
Type
Angola, Loanda Distr., fl. & fr. 1858, Welwitsch 5068 (lectotype BM! [BM000931064], selected by Darbyshire (2015); isolectotypes C* [C10000003], K! [K000394523], LISU! [LISU223390], P* [P00434404]). Additional original syntypes: Angola, Distr. de Cazengo, Muxaûlo, fl. June 1855, Welwitsch 5114 (BM! [BM001121075], LISU! [LISU223392]); without locality & date, fr., Welwitsch 5122 (BM! [BM001252129], LISU! [LISU223394]); Distr. Loanda, fl. May – June 1858, Welwitsch 5187 (BM! [BM001121074], K! [K000394522], LISU! [LISU223393]); inter Bumbo et Bruco, fr. Oct. 1859, Welwitsch 5034 (BM! [BM001252128], LISU! [LISU223391]); Ambriz, fl. March 1873, Monteiro & Monteiro s.n. (K! [K000394524]); Loango, rand des Bengwahls nordl. am [?]Chinchoro, fl. 13 April 1874, Soyaux 26 (K! [K000394479], M! [M0242131]); Huilla-Humpata, fl. & fr. Sept. 1883, H. H. Johnston s.n. (K! [K001009510]).

Native to:

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

Barleria elegans S.Moore ex C.B.Clarke appears in other Kew resources:

Date Reference Identified As Barcode Type Status
Dec 23, 1899 Forbes, J. [s.n.], South Africa K000794971 holotype
Mar 9, 1897 Soyaux, H. [26], Congo K000394479
Mar 9, 1897 Welwitsch [5187], Angola K000394522 Unknown type material
Mar 9, 1897 Monteiro, Monteiro [s.n.], Angola K000394524
Welwitsch [5068], Angola K000394523 Unknown type material

First published in D.Oliver & auct. suc. (eds.), Fl. Trop. Afr. 5: 154 (1899)

Accepted by

  • Figueiredo, E. & Smith, G.F. (2008). Plants of Angola Strelitzia 22: 1-279. National Botanical Institute, Pretoria.
  • Govaerts, R. (1996). World Checklist of Seed Plants 2(1, 2): 1-492. MIM, Deurne.

Literature

Kew Bulletin

  • Balkwill, M. J. & Balkwill, K. (1997). Delimitation and infra-generic classification of Barleria (Acanthaceae). Kew Bull. 52: 535 – 573.
  • Benoist, R. (1950). Quelques Acanthacées des colonies Portugaises Africanes. Bol. Soc. Brot. Sér. 2, 24: 5 – 39.
  • Clarke, C. B. (1899). Barleria. In: I. H. Burkill & C. B. Clarke (1899 – 1900), Acanthaceae. In: W. T. Thiselton-Dyer (ed.), Flora of Tropical Africa 5: 140 – 169. L. Reeve & Co., London.
  • Clarke, C. B. (1901). Barleria. In: W. T. Thiselton-Dyer (ed.), Flora Capensis. Vol. 5 (Pt. 1): 44 – 55 . L. Reeve & Co., London.
  • Craven, P. (ed.) (1999). A checklist of Namibian plant species. South African Botanical Diversity Network Report No. 7, SABONET, Windhoek.
  • Darbyshire, I. (2015). Barleria. In: J. R. Timberlake & E. S. Martins (eds), Flora Zambesiaca. Vol. 8 (6): 37 – 122. Royal Botanic Gardens, Kew.
  • Darbyshire, I., Nanyeni, L., Chase, F. M. & Gonçalves, F. M. P. (2018). A synopsis of Rhinacanthus (Acanthaceae) in Angola and Namibia. Kew Bull. 73: 21. 10.1007/s12225-018-9746-5
  • Darbyshire, I., Tripp, E. A. & Dexter, K. G. (2012). A new species and a revised record in Namibian Barleria (Acanthaceae). Kew Bull. 67: 759 – 766.
  • Hiern, W. P. H. (1900). Catalogue of the African plants collected by Friedrich Welwitsch in 1853 – 1861. Dicotyledons, part IV Lentibulariaceae to Ceratophylleae. British Museum (Natural History), London.
  • Klaassen, E. & Kwembeya, E. (eds) (2013). A checklist of Namibian indigenous and naturalised plants. Occasional Contributions No. 5, National Botanical Research Institute, Windhoek.
  • Klopper, R. R., Chatelain, C., Bänninger, V., Habashi, C., Steyn, H. M., de Wet, B. C., Arnold, T. H., Gautier, L., Smith, G. E. & Spichiger, R. (2006). Checklist of the flowering plants of sub-Saharan Africa. An index of accepted names and synonyms. South African Botanical Diversity Network Report No. 42, SABONET, Pretoria.
  • Makholela, T. (2008). Acanthaceae. In: E. Figueiredo & G. F. Smith (eds), Plants of Angola / Plantas de Angola. Strelitzia 22. South African National Biodiversity Institute, Pretoria.
  • Mendelsohn, J., Jarvis, A., Roberts, C. & Robertson, T. (2002). Atlas of Namibia. A portrait of the land and its people. Ministry of Environment & Tourism and David Philip, Cape Town.
  • Meyer, P. G. (1968). 130. Acanthaceae. In H. Merxmüller (ed.), Prodromus einer Flora von Südwestafrika. J. Cramer, Germany.
  • Moore, S. le (1880). Enumeratio Acanthacearum Herbarii Welwitschiani Angolensis. J. Bot. 18: 193 – 199, 225 – 233, 265 – 270, 307 – 314, 340 – 342 & 362 – 366.
  • Obermeyer, A. A. (1933). A revision of the South African species of Barleria. Ann. Transvaal Mus. 15: 123 – 180.
  • Singh, Y., Baijnath, H. & Condy, G. (2015). Barleria elegans. Fl. Pl. Africa 64: pl. 2316, 136 – 142.
  • Welman, W. G. (2003). Acanthaceae. In: G. Germishuizen & N. L. Meyer (eds), Plants of southern Africa: an annotated checklist. Strelitzia 14: 92 – 106. National Botanical Institute, Pretoria.

Flora Zambesiaca

  • in F.T.A. 5: 154 (1899).
  • in Fl. Cap. 5: 49 (1901).
  • —Bandeira et al., Fl. Nat. Sul Moçamb.: 191 (2007).
  • —Compton, Fl. Swaziland: 552 (1976).
  • —Meyer in Merxmüller, Prodr. Fl. SW Afr. 130: 16 (1968).
  • —Obermeijer in Ann. Transv. Mus. 15: 154 (1933).

Kew Backbone Distributions

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

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