Skip to main content
This species is accepted, and its native range is E. DR Congo to SW. Kenya.

[FZ]

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

Morphology General Habit
Erect, decumbent or scandent perennial herb or subshrub, 35–200 cm tall; stems pubescent in two opposite lines or on paired opposite ridges, hairs short and antrorse, rarely longer and both antrorse and retrorse.
Morphology Leaves
Leaves sometimes absent at flowering, ovate to elliptic, 8.5–17 × 4–9 cm, base (cuneate-)attenuate, apex acuminate, principal veins and margin shortly pubescent, upper surface sparsely pubescent or rarely pilose, lateral veins 7–11 pairs; petiole 10–80 mm long.
Morphology Reproductive morphology Inflorescences
Inflorescence terminal, spiciform, 2–14.5 cm long, each cymule several-flowered; axis antrorse- to spreading-pubescent, sometimes additionally glandular-puberulous and/or glandular-pilose; bracts pale green with markedly darker acumen and midrib or dark green throughout, often purple-tinged, variously suborbicular, ovate, elliptic, obovate or obcordiform, 4.5–11.5(15) × 2.3–6.7 mm, apex attenuate to curved-caudate, margin and often midrib pubescent, surface sometimes glandular-puberulous and/or glandular-pilose; bracteoles as bracts but (linear-)lanceolate, 3.5–8(9.5) × 0.5–2.2 mm.
Morphology Reproductive morphology Flowers Calyx
Calyx lobes linear, 3.7–7.5 mm long, surface shortly pubescent and ± densely glandular-pilose.
Morphology Reproductive morphology Flowers Corolla
Corolla 10.5–17.5 mm long, tube white, limb pink, purple, blue or rarely white, limb pilose towards apex externally; tube subcylindrical, 4.5–7 mm long; upper lip subulate, 6–10.5 mm long, apex obtuse; lower lip 6.5–11 mm long, lobes oblong, 3–5.5 mm long.
Morphology Reproductive morphology Flowers Androecium Stamens
Stamens with filaments (6)8.5–13 mm long; anthers 1.5–2 mm long.
Morphology Reproductive morphology Flowers Gynoecium Stigma
Stigma minute, barely wider than style.
Morphology Reproductive morphology Fruits
Capsule 6–8 mm long, puberulous to sparsely so in upper half.
Morphology Reproductive morphology Seeds
Seeds 0.9–1.8 mm wide, rugulose-tuberculate.

Native to:

Kenya, Tanzania, Uganda, Zambia, Zaïre

Brachystephanus coeruleus S.Moore appears in other Kew resources:

First published in J. Bot. 45: 332 (1907)

Accepted by

  • Champluvier, D. & Darbyshire, I. (2009). A revision of the genera Brachystephanus and Oreacanthus (Acanthaceae) in tropical Africa Systematics and Geography of Plants 79: 115-192.
  • Darbyshire, I., Vollesen, K. & Kelbessa, E. (2010). Flora of Tropical East Africa, Acanthaceae (Part 2): 287-756.
  • 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 J. Bot. 45: 332 (1907).
  • —Darbyshire in F.T.E.A. Acanthaceae 2: 471 (2010).

Kew Backbone Distributions

  • Champluvier, D. & Darbyshire, I. (2009). A revision of the genera Brachystephanus and Oreacanthus (Acanthaceae) in tropical Africa Systematics and Geography of Plants 79: 115-192.

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