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This species is accepted, and its native range is S. Ethiopia to S. Africa, Madagascar.
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: Tanzania, Kondoa District: Irangi, Fischer 507 (B†, holo.) neotype selected here: Tanzania, Same District: Mkomazi Game Reserve, Ngurunga Dam, Abdallah, Mboya & Vollesen 96/109 (K!, neo; NHT, isoneo.)
Morphology General Habit
Aromatic succulent mat-forming herb with stems up to 0.5 m long
Morphology Stem
Stems brittle, succulent, procumbent, quadrangular, arising from a taproot, rooting at nodes below, densely pubescent or villose with long spreading glandular and eglandular hairs and also with retrorse hairs and red sessile glands, sometimes spreading hairs absent
Morphology Leaves
Leaves spreading, succulent, petiolate or sessile; blades elliptic, rhombic or obovate, 1–3.5 × 0.5–2 cm, serrate, weakly revolute, apex acute to rounded, base cuneate to attenuate, pubescent with long glandular and eglandular hairs and red sessile glands and sometimes with short glandular hairs; petioles 0–5 mm long
Morphology Reproductive morphology Inflorescences
Inflorescence condensed above with adjacent 6-flowered verticils touching atanthesis or slightly separated and up to 10 mm apart in fruit, with bracts subtending sessile 3-flowered cymes; bracts succulent, persistent, erect above, soon becoming spreading, broadly elliptic to oblong, 10 mm long, rounded to mucronate at apex, often reddish on margins; pedicels erect, 3–4 mm long, flattened, slightly winged at base, distally curved
Morphology Reproductive morphology Flowers Calyx
Calyx 3 mm long, pubescent or villose, with red sessile glands; fruiting calyx 5 mm long, shortly tubular and with pedicel attached excentrically behind posterior lip; throat truncate, densely villose; posterior lip shortly decurrent, curving upwards, elliptic or obovate, mucronate at apex; anterior lip 4-lobed with lobes lanceolate, the median longer than the lateral
Morphology Reproductive morphology Flowers Corolla
Corolla white marked blue, blue or purple, 11–18 mm long, with red sessile glands and scattered hairs on lobes; tube 5–10 mm long, sigmoid; posterior lip slightly shorter than anterior lip; anterior lip 6–10 mm long, horizontal, cucullate, enclosing stamens
Morphology Reproductive morphology Flowers Androecium Stamens
Staminal filaments fused
Morphology Reproductive morphology Fruits
Nutlets pale brown, with red gland dots, broadly ovate in outline, flattened, 1 mm long, smooth, producing dotted mucilage when wet.
Ecology
Rocky ground, Acacia-Commiphora bushland; 100–1900 m
Conservation
Least concern; widely distributed
Distribution
Range: Ethiopia, Zambia, Malawi, Mozambique, Zimbabwe, Botswana, Caprivi Strip and South Africa, Madagascar Flora districts: U1 K1 K2 K3 K4 K6 K7 T2 T3 T5 T6 T8

Native to:

Botswana, Caprivi Strip, Ethiopia, Kenya, KwaZulu-Natal, Madagascar, Malawi, Mozambique, Namibia, Northern Provinces, Swaziland, Tanzania, Uganda, Zambia, Zimbabwe

Coleus lasianthus Gürke appears in other Kew resources:

Date Reference Identified As Barcode Type Status
Nov 1, 2007 Festo [2637], Kenya Plectranthus lasianthus K000479587
Volkens, G. [327], Tanzania Plectranthus lasianthus K000431987
Abdallah, R. [96/109], Tanzania Plectranthus lasianthus K000247956 neotype
Liouigathus [s.n.`] Plectranthus tetensis K000430790
Codd, L.E. [5489], South Africa Plectranthus tetensis K000430839 isotype
Kirk, J. [s.n.], Mozambique Plectranthus tetensis K000430789 Unknown type material
Phillipson, P. [1833], Madagascar Plectranthus erubescens K000430815

First published in Bot. Jahrb. Syst. 19: 212 (1894)

Not accepted by

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

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