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

Conservation
This species is highly restricted in Namibia, being known only from Mpalila Island in Zambezi Region (formerly the Caprivi Strip) where it was recorded as rare by P. du Preez. Much of the woodland habitat in the Zambezi Region has been degraded and so this species is likely to be nationally threatened under IUCN criterion B. However, on a global scale this species is widespread and fairly common in drier Zambesian woodlands and, although the complete EOO has not been calculated, it is known to be in excess of 800,000 km2. Therefore, it is not considered to be globally threatened and has been assessed as of Least Concern — LC (Darbyshire 2015).
Distribution
Namibia (Zambezi Region); Mozambique, Malawi, Zambia, Zimbabwe, South Africa (Mpumalanga Province), eSwatini.
Ecology
In Namibia, Barleria ameliae has been recorded from poorly drained scrub on gravelly clay soils; c. 900 – 950 m elevation. Elsewhere within its range it is widespread in drier woodland types within the Zambesian Regional Centre of Endemism (White 1983), most notably in Colophospermum mopane and Acacia woodland on sandy soils, but also recorded from dry open riverine forest and thicket, and from seasonally inundated Acacia wooded-grassland.
Morphology General Habit
Perennial herb or subshrub, erect or decumbent, 15 – 120 cm tall, often rooting at lower nodes; stems 4-angular, glabrous or minutely puberulous, woody portion of stems with pale grey or sandy-coloured bark
Morphology General Spines
Axillary spines present but inconspicuous, pale brown or whitish, 4-rayed, stalk to 1 mm long, longest ray 2 – 7 mm long
Morphology Leaves
Leaves on petiole to 13 mm long, blade elliptic or elliptic-obovate, 4.8 – 10.5 × 1.6 – 4.7 cm (l:w ratio 2 – 3.5: 1), base cuneate-attenuate, long-decurrent, margin entire, apex acute or attenuate, tip mucronulate, margin, midrib and veins beneath strigose, later glabrescent
Morphology Reproductive morphology Flowers Androecium Stamens
Stamens inserted 8 – 11 mm from base of corolla tube; filaments 11.5 – 21 mm long, pubescent in proximal two thirds; anthers 2.5 – 4 mm long; lateral staminodes 1.3 – 2 mm long, pubescent, antherodes ± 1 mm long
Morphology Reproductive morphology Flowers Calyx
Calyx green, often paler towards base or pale green throughout; anterior and posterior lobes subequal, ovate or lanceolate, anterior lobe 10.5 – 14 (– 16.5) × 3 – 5.5 mm, posterior lobe 11 – 17 (– 20) mm long, margin entire, apex acute or attenuate, spinose, anterior lobe sometimes notched, external surface strigose, rarely also with few short glandular hairs towards apex, venation parallel, prominent in fruit; lateral lobes linear-lanceolate, 10 – 14 mm long
Morphology Reproductive morphology Flowers Corolla
Corolla yellow, orange or apricot, 27 – 40 mm long, pubescent externally with mixed glandular and eglandular hairs; tube cylindrical, 10 – 18 mm long; limb in “4+1” configuration; abaxial lobe offset from remaining lobes by 4.5 – 8 mm, (elliptic-) obovate, 9 – 14 × 5 – 7.5 mm, apex rounded or obtuse; lateral and adaxial lobes subequal, elliptic, 11 – 16 × 6.5 – 8.5 mm or adaxial lobes narrower, minimum 4.5 mm wide, apices obtuse or acute
Morphology Reproductive morphology Flowers Gynoecium Pistil
Pistil glabrous or ovary minutely hairy; stigma linear, 0.7 – 1.1 mm long
Morphology Reproductive morphology Fruits
Capsule 13 – 16 mm long, glabrous or sparsely and minutely hairy; seeds 7 – 8 × 4.5 – 6 mm.
Morphology Reproductive morphology Inflorescences
Inflorescences axillary or a ± weakly defined terminal spike, 2.5 – 22 cm long, lax or rarely contracted, each cymule 1- or 3-flowered, sessile; bracts ± spreading, lower pairs foliaceous, gradually reducing distally where oblanceolate, 11 – 38 (– 48) × 2.5 – 15 mm, apex acute or shortly attenuate, mucronate, hairs as leaves beneath or more widespread; bracteoles white-green, lanceolate-spinose, 2.5 – 10.5 × 0.8 – 1.2 mm, margin entire
Note
Darbyshire (2015) recorded this species as being restricted to the Flora Zambesiaca region, but a recent loan of southern African specimens of Barleria sect. Prionitis from PRE to K has revealed that it also occurs in eSwatini and eastern Mpumalanga.
Type
Namibia, Caprivi Strip, Mpilila Island, fl. 15 Jan. 1959, Killick & Leistner 3391 (holotype PRE; isotypes K! [K000394535, K000394536], L, M! [M0109645], SRGH, WIND).

[FZ]

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

Morphology General Habit
Perennial herb or subshrub 15–120 cm tall, erect or decumbent, often rooting at lower nodes; stems glabrous or minutely puberulous; woody stems with pale grey or sandy bark.
Morphology General Spines
Axillary spines small, 4-rayed, stalk to 1 mm long, longest ray 2–7 mm long.
Morphology Leaves
Leaves elliptic(-obovate), 4.8–10.5 × 1.6–4.7 cm, base cuneate-attenuate, long-decurrent, apex acute or attenuate, mucronulate, margin, midrib and veins strigose beneath, glabrescent; petiole to 13 mm.
Morphology Reproductive morphology Inflorescences
Inflorescence axillary or a ± weakly defined terminal spike, 2.5–22 cm long, lax or rarely congested, each cymule 1- or 3-flowered, sessile; bracts ± spreading, lower pairs foliaceous, reducing upwards where oblanceolate, 11–38(48) × 2.5–15 mm, apex acute or shortly attenuate, mucronate, hairs as leaves beneath or more widespread; bracteoles white-green, lanceolate-spinose, 2.5–10.5 × 0.8–1.2 mm.
Morphology Reproductive morphology Flowers Calyx
Outer calyx lobes subequal, ovate or lanceolate, anterior lobe 10.5–14(16.5) × 3–5.5 mm, posterior lobe 11–17(20) mm long, apex acute or attenuate, spinose, anterior lobe sometimes notched, surface strigose, rarely with a few minute glandular hairs towards apex, venation parallel, prominent in fruit; lateral lobes 10–14 mm long.
Morphology Reproductive morphology Flowers Corolla
Corolla 27–40 mm long, yellow, orange or apricot, pubescent externally; tube 10–18 mm long; limb in 4+1 arrangement; abaxial lobe 9–14 × 5–7.5 mm, offset by 4.5–8 mm; lateral and adaxial lobes subequal, 11–16 × 6.5–8.5 mm or adaxial lobes narrower, minimum 4.5 mm wide.
Morphology Reproductive morphology Flowers Androecium Stamens
Stamens with filaments 11.5–21 mm long, pubescent in proximal two-thirds; anthers 2.5–4 mm; lateral staminodes 1.3–2 mm, pubescent, antherodes c.1 mm.
Morphology Reproductive morphology Flowers Gynoecium Ovary
Ovary glabrous or minutely hairy; style glabrous; stigma linear, 0.7–1.1 mm long.
Morphology Reproductive morphology Fruits
Capsule 13–16 mm long, glabrous or sparsely and minutely hairy.
Morphology Reproductive morphology Seeds
Seeds 7–8 × 4.5–6 mm.
Distribution
Not known elsewhere.
Ecology
Mainly in mopane and Acacia woodland on sandy soils, and dry open riverine forest and thicket; 100–1100 m.
Conservation
Conservation notes: Widespread but patchily distributed, can be locally common or abundant in dry woodland; Least Concern.

Native to:

Caprivi Strip, Malawi, Mozambique, Northern Provinces, Zambia, Zimbabwe

Barleria ameliae A.Meeuse appears in other Kew resources:

Date Reference Identified As Barcode Type Status
May 1, 2010 Killick, D.J.B. [3391], Namibia K000394536 isotype
May 1, 2010 Killick, D.J.B. [3391], Namibia K000394535 isotype

First published in Bothalia 7: 443 (1961)

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.

Not accepted by

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

Literature

Kew Bulletin

  • 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., Tripp, E. A. & Dexter, K. G. (2012). A new species and a revised record in Namibian Barleria (Acanthaceae). Kew Bull. 67: 759 – 766.
  • 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.
  • Mapaura, A., Timberlake, J. & Kamumvuri, G. (2004). Acanthaceae. In: A. Mapaura & J. Timberlake (eds), A checklist of Zimbabwean vascular plants. Southern African Botanical Diversity Network Report No. 33: 13 – 15. SABONET, Pretoria.
  • Meeuse, A. (1961). Barleria ameliae. In: Various Authors, Notes and new records of African plants. Bothalia 7: 443 – 444.
  • 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.
  • White, F. (1983). Vegetation of Africa. A Descriptive Memoir to Accompany the UNESCO/AETFAT/UNSO Vegetation Map of Africa. UNESCO, Paris.
  • Wood, J. R. I., Hillcoat, D. & Brummitt, R. K. (1983). Notes on the types of some names of Arabian Acanthaceae in the Forsskal herbarium. Kew Bull. 38: 429 – 456.

Flora Zambesiaca

  • in Bothalia 7: 443 (1961).

Kew Backbone Distributions

  • 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.

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