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This species is accepted, and its native range is SW. Tanzania to Angola.

[FTEA]

Lamiaceae (Labiatae), A.J. Paton, G. Bramley, O. Ryding, R.M. Polhill, Y.B. Harvey, M. Iwarsson, F. Willis, P.B. Phillipson, K. Balkwill, C.W. Lukhoba, D.F. Otieno, & R.M. Harley. Flora of Tropical East Africa. 2009

Type
Type: Congo-Kinshasa, Upper Katanga, Dilemba, Hock s.n. (BR!, syn., K!, photo.) & Plateau de Shinkwari [Manika], Hock s.n. (BR!, syn.)
Morphology General Habit
Perennial suffrutex 15–35 cm tall, with several stems arising from a large fleshy rootstock, not reported to be aromatic
Morphology Stem
Stems erect, rounded-quadrangular, usually leafless when flowering, usually sparsely branched, woody only at base, viscid, sparsely pubescent with patent or antrorse eglandular hairs and short patent glandular hairs, and with scattered orange and pale sessile glands
Morphology Leaves
Leaves opposite, ascending, sessile or shortly petiolate, mostly confined to sterile shoots but sometimes present on younger flowering shoots; blades elliptic, 1.2–4 (up to 2 cm long on flowering shoots) × 0.3–1.5 cm, entire or serrate, weakly revolute, apex acute, base cuneate, sparselypubescent, glandular-punctate; petioles 0–2 mm long
Morphology Reproductive morphology Inflorescences
Inflorescence lax with few branches; flowers ± regularly spaced along axis, solitary in the axils of small bracts, arranged oppositely at base of inflorescence, spirally near apex, 5–15 mm apart in flower, 20 mm long apart in fruit; axis straight; bracts 1–2 mm long, narrowly ovate or elliptic, erect above forming an inconspicuous coma; pedicel 4–14 mm long with a distal portion with indumentum similar to calyx, separated from the less hairy lower portion by a circular abscission zone, pedicel left with a small terminal swelling at this point when calyx falls
Morphology Reproductive morphology Flowers Calyx
Calyx 3–4 mm long, densely pubescent with glandular and eglandular hairs and pale sessile glands; fruiting calyx 9–12 mm long, tubular, slightly curved with pedicel attached excentrically behind the posterior lip; throat truncate; lobes ± equal, triangular but with anterior lobes slightly narrower and longer and posterior lip very slightly broader
Morphology Reproductive morphology Flowers Corolla
Corolla pale or dark blue or violet, rarely white, 10–18 mm long; tube sigmoid, 7–11 mm long; posterior lip slightly shorter than anterior; anterior lip 5–10 mm long, deeply cucullate, enclosing stamens, pubescent or sparsely so with glandular and eglandular hairs and pale or orange sessile glands
Morphology Reproductive morphology Flowers Androecium Stamens
Staminal filaments fused; anthers, elongated, dorsifixed, outer edges of locules fused in lower half to form a pouch which opens distally
Morphology Reproductive morphology Flowers Gynoecium Style
Style almost entire but with a small anterior depression
Morphology Reproductive morphology Fruits
Nutlets brown, broadly ovoid, 1.5 mm long, smooth with darker raised areas, producing a small amount of mucilage when wet
Figures
Fig 39: 10, p 230 & 51, p 287
Ecology
Grassland or woodland prone to burning, sandy soil; 1500–2400 m
Conservation
Least concern; widely distributed
Note
See P. foliatus
Distribution
Range: Congo-Kinshasa, Angola, Zambia and Malawi Flora districts: T7

Native to:

Angola, Malawi, Tanzania, Zambia, Zaïre

Coleus articulatus (I.M.Johnst.) A.J.Paton appears in other Kew resources:

First published in PhytoKeys 129: 21 (2019)

Accepted by

  • Paton, A.J., Mwanyambo, M. Govaerts, R.H.A., Smitha, K., Suddee, S., Phillipson, P.B., Wilson, T.C., Forster, P.I. & Culham, A. (2019). Nomenclatural changes in Coleus and Plectranthus (Lamiaceae): A tale of more than two genera PhytoKeys 129: 1-158.

Literature

Kew Backbone Distributions

  • Figueiredo, E. & Smith, G.F. (2008). Plants of Angola Strelitzia 22: 1-279. National Botanical Institute, Pretoria.
  • Paton, A.J., Bramley, G., Ryding, O., Polhill, R., Harvey, Y., Iwarsson, M., Willis, F., Phillipson, P., Balkwill, K., Lukhoba, C., Otiend, D & Harley (2009). Lamiaceae (Labiatae) Flora of Tropical East Africa: 1-430.

Flora of Tropical East Africa
Flora of Tropical East Africa
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