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This species is accepted, and its native range is NE. Tropical Africa to N. Kenya, SW. Arabian. Peninsula.
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
Types: Ethiopia, Dehli-Dikeno, Schimper 527 (B†, holo.) neotype, chosen by Ryding, loc. cit. (2001): Ethiopia, Gondar Region, Dehli Dikeno, Schimper 1623 (P, neo.)
Morphology General Habit
Aromatic soft-wooded shrub 0.7–2.5 m tall
Morphology Stem
Stems succulent, frequently leafless or with few leaves when flowering, erect or ascending, rounded-quadrangular, freely branching, with epidermis black or silvery, wrinkled and fissured below and with prominent leaf scars, glabrous, pruinose or hoary with very short, adpressed, retrorse hairs below, becoming pubescent on the inflorescence axis with mainly eglandular, retrorse and patent hairs and with red, sessile glands
Morphology Leaves
Leaves mainly found on short lateral shoots, but also found at the apex of young shoots, largely deciduous before flowering, ovate-rounded, 1–6.5 × 1–5 cm, margin entire or sinuate, apex rounded, base attenuate or truncate but attenuate at petiole, sparsely pubescent, with redsessile glands; petioles 3–15 mm long
Morphology Reproductive morphology Inflorescences
Inflorescences mainly found on short lateral shoots; verticils laxly disposed, variable, 2-flowered to 4–12-flowered with bracts subtending sessile, pedunculate or sometimes pedunculate cymes of 1–6 flowers; bracts small, 0.5–3 mm long; pedicels 6–8 mm long in flower, 12–20 mm long in fruit; peduncles up to 8 mm long in fruit
Morphology Reproductive morphology Flowers Calyx
Calyx 5 mm long, pubescent, with red sessile glands; fruiting calyx 10 mm long, funnel-shaped with pedicels attached at centre of calyx base, slightly constricted above nutlets; throat truncate; posterior lip expanded, membranous, obovate to rounded, mucronate at apex, not decurrent; lateral lobes deltate with posterior margin extended towards posterior lip to form a shoulder and with a small lanceolate or subspinescent tooth; median lobes lanceolate, spinescent at apex, equal to lateral lobes
Morphology Reproductive morphology Flowers Corolla
Corolla pale violet to deep purple or blue, 15–20 mm long, sparsely pubescent, with red and pale sessile glands; tube 7–10 mm long, sigmoid; posterior lip shorter than anterior; anterior lip 10–12 mm long, ascending, cucullate, enclosing stamens
Morphology Reproductive morphology Flowers Androecium Stamens
Staminal filaments fused at base
Morphology Reproductive morphology Fruits
Nutlets pale brown speckled reddish brown, broadly ovoid, 1–2 mm long, ± smooth, producing copious speckled mucilage when wet.
Ecology
Dry rocky hillsides or in Acacia-Commiphora bushland; 500–2500 m
Conservation
Least concern; widely distributed
Distribution
Range: Sudan, Ethiopia, Eritrea, Somalia and Yemen Flora districts: K1

Native to:

Djibouti, Eritrea, Ethiopia, Kenya, Somalia, Sudan, Yemen

Coleus igniarius Schweinf. appears in other Kew resources:

Date Reference Identified As Barcode Type Status
Nov 2, 2011 Schweinfurth [1398], Eritrea Plectranthus igniarius K000735374
Ash [1769], Ethiopia Plectranthus igniarius 35907.000
Schweinfurth, G. [1398], Ethiopia Plectranthus igniarius K000431910 neotype
Schweinfurth, G. [1122], Ethiopia Plectranthus igniarius K000431911

First published in Beitr. Fl. Aethiop.: 121 (1867)

Not accepted by

  • Darbyshire, I., Kordofani, M., Farag, I., Candiga, R. & Pickering, H. (eds.) (2015). The Plants of Sudan and South Sudan: 1-400. Kew publishing, Royal Botanic Gardens, Kew. [Cited as Plectranthus igniarius.]
  • Govaerts, R. (1999). World Checklist of Seed Plants 3(1, 2a & 2b): 1-1532. MIM, Deurne. [Cited as Plectranthus igniarius.]
  • 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 igniarius.]

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.
  • Thulin, M. (ed.) (2006). Flora of Somalia 3: 1-626. The Royal Botanic Gardens, Kew.

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