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This species is accepted, and its native range is Ethiopia to N. & NW. Tanzania.
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: Kenya, Teita District: Ndi Hill, Hildebrandt 2522 (B†, holo.) neotype selected here: Kenya, Teita District, Mbololo Forest, Taita Hills Expedition 1042 (K!, neo. EA, isoneo.)
Morphology General Habit
Aromatic perennial soft-wooded shrub 1–2.5 m tall
Morphology Stem
Stems erect or ascending, branched, with leaves or sometimes reported as leafless when flowering and with conspicuous leaf scars, densely pubescent with patent and antrorse hairs, with reddish and pale sessile glands, and with small patent glandular hairs in the inflorescence axis
Morphology Leaves
Leaves spreading, petiolate, sometimes discolorous and paler beneath; blades ovate, 4–12 × 2–8 cm, serrate or crenate, apex acute or obtuse, base subcordate, truncate or cuneate, usually attenuate at petiole, pubescent to tomentose with hairs often denser beneath and with reddish and pale sessile glands; petiole 7–15 mm long
Morphology Reproductive morphology Inflorescences
Inflorescence axillary or terminal, lax or condensed but with the inflorescence axis always visible betweeen verticils, with flowers arranged in ± 20flowered verticils up to 20 mm apart, with bracts subtending ± 10-flowered sessile but shortly circinnate cymes; bracts showy, ovate, apiculate at apex, cucullate, 5–25 mm long, erect above encasing young buds forming an apical coma, soon deciduous below leaving a conspicuous scar; pedicels 1–4 mm long, erect
Morphology Reproductive morphology Flowers Calyx
Calyx 4–5 mm long, densely pubescent, with reddish and pale sessile glands; fruiting calyx ascending, 7–9 mm long, tubular, curved with pedicel attached centrally to base of calyx; throat truncate; posterior lip narrowly triangular, horizontal, not decurrent; lobes of anterior lip lanceolate, sometimes curved at apex to form small hooks; lateral lobes closer to the posterior lobe rather than the median lobes of the anterior lip, giving the calyx a 3/2 lobe arrangement, rather than 1/4, median lobes of the anterior lip separated by a deep sinus
Morphology Reproductive morphology Flowers Corolla
Corolla 14–22 mm long, blue, sparsely pubescent, with pale and reddish sessile glands, with hairs and glands denser on the lobes; tube 7–9 mm long, sigmoid; posterior lip 4-lobed, median exceeding lateral,shorter than anterior lip; anterior lip 9–12 mm long, cucullate enclosing stamens
Morphology Reproductive morphology Flowers Androecium Stamens
Staminal filaments fused
Morphology Reproductive morphology Fruits
Nutlet brown with darker speckles, flattened-ovoid, smooth, producing copious speckled mucilage when wet
Figures
Fig 58, p 353
Ecology
On rocky outcrops or rocky hillsides, also reported from open Acacia woodland, open forest or roadsides; 900–2250 m
Conservation
Least concern; widely distributed
Note
Agnew’s combination is accepted here, though he did not cite the exact basionym date in making the combination, he gave the range of the volume publication (1880–1882).
Distribution
Range: Rwanda, Sudan and Ethiopia Flora districts: U1 U2 U3 U4 K2 K3 K5 K6 K7 T1 T2 T3 T4

Native to:

Ethiopia, Kenya, Rwanda, Sudan, Tanzania, Uganda

Coleus lactiflorus Vatke appears in other Kew resources:

Date Reference Identified As Barcode Type Status
Beentje, H.J. [1042], Kenya Plectranthus lactiflorus K000975978 neotype

First published in Linnaea 43: 89 (1881)

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 lactiflorus.]
  • Govaerts, R. (1999). World Checklist of Seed Plants 3(1, 2a & 2b): 1-1532. MIM, Deurne. [Cited as Plectranthus lactiflorus.]
  • 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 lactiflorus.]
  • 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 lactiflorus.]

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