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This species is accepted, and its native range is S. DR Congo to N. Zambia.

[FZ]

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

Morphology General Habit
Decumbent perennial herb or shrub, 30–180 cm tall, rooting at lower nodes; stems shortly and sparsely antrorse-pubescent on paired opposite ridges or with scattered crisped-pilose hairs, soon glabrescent.
Morphology Leaves
Leaves ovate to elliptic, 4–17.5 × 1.8–11.5 cm, base cuneate to attenuate or uppermost leaves subcordate, apex acuminate, principal veins beneath and midrib above shortly and sparsely pubescent, upper surface sometimes pubescent, or blade glabrous except for short marginal hairs, lateral veins 6–10 pairs; petiole 4–90 mm long.
Morphology Reproductive morphology Inflorescences
Inflorescence terminal, laxly but often narrowly paniculate, 5–39 × 2–12 cm, cymules dichasial or partially monochasial; indumentum of axis variable, densely purple-pilose, most hairs with a minute gland tip, and/or pale-puberulous with interspersed pale glandular hairs, the gland tip more conspicuous; main axis bracts and bracteoles usually inconspicuous, narrowly triangular to linear, 0.8–4(5) × 0.5 mm.
Morphology Reproductive morphology Flowers Calyx
Calyx lobes linear, 2–4(6.5) mm long in flower, 3.5–5.5(10.5) mm long in fruit, puberulous and glandular-pilose or -pubescent.
Morphology Reproductive morphology Flowers Corolla
Corolla (11)15–18 mm long, white, lilac or mauve, glabrous or limb pilose externally; tube subcylindrical, 4.5–7 mm long; upper lip subulate, (6)8–9.5 mm long, apex obtuse; lower lip (6)8–12.5 mm long, lobes oblong, 3–4.5 mm long.
Morphology Reproductive morphology Flowers Androecium Stamens
Stamens with filaments (7.5)9–12.5 mm long; anthers 1.4–2.2 mm long.
Morphology Reproductive morphology Flowers Gynoecium Stigma
Stigma minute, barely wider than style.
Morphology Reproductive morphology Fruits
Capsule 7.5–12 mm long, glabrous.
Morphology Reproductive morphology Seeds
Seeds 1–2.4 mm wide, rugose-tuberculate.
Distribution
Also in southern D.R. Congo.
Ecology
Shaded streamsides, wet riverine forest (mushitu) and dry evergreen forest; 1400–1600 m.
Conservation
Conservation notes: Currently known from 10 localities but probably more widespread in under-collected regions of southern D.R. Congo and N Zambia. Its riverine and mid-altitude forest habitat is under threat from human encroachment; potentially threatened.

Native to:

Zambia, Zaïre

Brachystephanus montifuga (Milne-Redh.) Champl. appears in other Kew resources:

First published in Syst. & Geogr. Pl. 79: 147 (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: 147 (2009).

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