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This species is accepted, and its native range is DR Congo to Angola.

[FZ]

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

Morphology General Habit
Perennial herb, 30–100 cm tall; stems shortly and sparsely antrorse-pubescent on paired opposite ridges.
Morphology Leaves
Leaves ovate(-elliptic), 5.5–10.5 × 2.5–4.2 cm, base cuneate to attenuate, apex subattenuate to acuminate, principal veins beneath, margin and midrib above shortly and sparsely pubescent, elsewhere glabrous, lateral veins 6–7 pairs; petiole 7–30 mm long.
Morphology Reproductive morphology Inflorescences
Inflorescence terminal, spiciform, 3–8 cm long, each cymule several-flowered; axis antrorse-pubescent, sometimes additionally glandular-pilose or -pubescent; bracts green, sometimes with paler margin, linear-lanceolate, 5.5–11 × 0.7–1.8 mm, straight to curved, margin and midrib shortly pubescent, surface sometimes glandular-pilose; bracteoles as bracts but 4–8.5 × 0.5–1 mm.
Morphology Reproductive morphology Flowers Calyx
Calyx lobes linear, 3.2–5.5 mm long, shortly pubescent and at least sparsely glandular-pilose.
Morphology Reproductive morphology Flowers Corolla
Corolla 16–19 mm long, pale mauve, limb pilose towards apex externally; tube subcylindrical, 5–7 mm long; upper lip subulate, 8.5–11 mm long, apex obtuse; lower lip 8.5–12 mm long, lobes oblong, 4–7 mm long.
Morphology Reproductive morphology Flowers Androecium Stamens
Stamens with filaments 9–12 mm long; anthers 1.4–1.7 mm long.
Morphology Reproductive morphology Flowers Gynoecium Stigma
Stigma minute, barely wider than style.
Morphology Reproductive morphology Fruits
Capsule 6.5–7 mm long, glabrous.
Morphology Reproductive morphology Seeds
Seeds rugulose.
Distribution
Also in D.R. Congo and Angola.
Ecology
In riverine forest and woodland; 1500–1650 m.
Conservation
Conservation notes: Although widespread in the northern Zambesian centre of endemism, this species is scarce, currently known from only 12 collections (only two from Zambia). Its favoured riparian habitats are perhaps threatened by human encroachment, although site-specific threats are unknown.

Native to:

Angola, Zambia, Zaïre

Brachystephanus calostachyus Champl. appears in other Kew resources:

First published in Syst. & Geogr. Pl. 79: 131 (2009)

Accepted by

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

Literature

Flora Zambesiaca

  • in Syst. Geogr. Pl. 79: 131, fig.1 (2009).

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

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