Skip to main content
This species is accepted, and its native range is Rwanda to S. Tropical Africa.
A specimen from Kew's Herbarium

[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
Lectotype, chosen here: Congo-Kinshasa, Welgelegen, Bequaert 486 (BR!, lecto.)
Morphology General Habit
Aromatic annual herb, 0.1–0.5 m tall
Morphology Stem
Stems erect or scandent, quadrangular, fleshy or leathery, woody at base, brittle, almost leafless when flowering, laxly branching or branching only in the inflorescence, pubescent with patent and retrorse hairs and pale sessile glands with longer patent hairs at nodes, becoming more densely glandular and perhaps viscid on the inflorescence axis
Morphology Leaves
Leaves spreading or ascending, becoming yellowish and deflexed above, thinly fleshy, mostly deciduous before flowering, sessile; blades ovate or broadly elliptic, 1.2–3 × 1–2 cm, becoming much smaller towards the inflorescence, subentire or weakly serrate, sometimes weakly revolute, apex obtuse or acute, base cuneate or attenuate, pubescent, with pale sessile glands; leaf scar perhaps becoming excretory, attracting ants
Morphology Reproductive morphology Inflorescences
Inflorescence axillary and terminal, sometimes with 2–3 inflorescence axes arising from one leaf scar, with flowers arranged in a spiral with a single flower in between an opposite or subopposite pair, each bract subtending a single flower with usually the single flower and pair forming a group of three separated from other groups by an internode; bracts elliptic, 1 mm long; pedicels 2–6 mm long
Morphology Reproductive morphology Flowers Calyx
Calyx 1–2 mm long, sparsely pubescent with glandular hairs and pale sessile glands; fruiting calyx 5–10 mm long tubular, slightly curved with pedicel attached excentrically behind the posterior lip; throat truncate; posterior lip obovate, apiculate, horizontal, becoming curving upwards, not decurrent; lateral lobes of anterior lip lanceolate, median lobes narrowly lanceolate, longer than the lateral lobes, curving slightly upwards
Morphology Reproductive morphology Flowers Corolla
Corolla blue, 3–5(–6) mm long, lobes with pale sessile glands; tube 1.5–3(–4) mm long, nearly straight or very shallowly sigmoid; posterior lip shorter than anterior; anterior lip 2 mm long, horizontal, cucullate, enclosing stamens
Morphology Reproductive morphology Flowers Androecium Stamens
Staminal filaments fused, but posterior stamens sometimes free
Morphology Reproductive morphology Fruits
Nutlets brown with darker speckles, broadly ovoid, slightly flattened, 1–1.5 mm long, producing copious speckled mucilage when wet.
Ecology
Brachystegia-Uapaca woodland; 950–1650 m
Conservation
Least concern; widely distributed
Note
Differs from P. gracillimus in having shorter pedicels and a larger fruiting calyx.
Distribution
Range: Congo-Kinshasa, Rwanda, Zambia, Malawi and Zimbabwe Flora districts: T7 T8

Native to:

Malawi, Rwanda, Tanzania, Zambia, Zaïre, Zimbabwe

Coleus efoliatus De Wild. appears in other Kew resources:

Date Reference Identified As Barcode Type Status
Kassner, T. [2951], Congo Plectranthus hjalmarii K000431870 isotype
Fanshawe, D.B. [42], Zimbabwe Englerastrum hjalmarii 2746.000
Stolz, A. [926], Tanzania Plectranthus efoliatus K000431960 isotype
Rogers, F.A. [26211], Congo, DRC Plectranthus leviculus K000431878 Unknown type material
Rogers, F.A. [26211], Congo, DRC Plectranthus leviculus K000431879 Unknown type material

First published in Contr. Fl. Katanga: 173 (1921)

Not accepted by

  • Govaerts, R. (1999). World Checklist of Seed Plants 3(1, 2a & 2b): 1-1532. MIM, Deurne. [Cited as Plectranthus efoliatus.]
  • Govaerts, R. (2003). World Checklist of Selected Plant Families Database in ACCESS: 1-216203. The Board of Trustees of the Royal Botanic Gardens, Kew. [Cited as Plectranthus efoliatus.]
  • 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. [Cited as Plectranthus efoliatus.]

Literature

Kew Backbone Distributions

  • 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

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 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