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This species is accepted, and its native range is SE. Kenya to N. Zambia.
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
Type: Malawi, Nyika Plateau, Whyte s.n. (K!, holo.)
Morphology General Habit
Perennial, semisucculent small shrub, 0.5 m tall
Morphology Stem
Stems ascending, roundedquadrangular, quadrangular in younger parts, woody, much branched with prominent leaf scars, pubescent to densely pubescent with patent, eglandular hairs and red sessile glands, becoming densely pubescent with longer hairs on the inflorescence axis
Morphology Leaves
Leaves ascending, sessile or shortly petiolate; blades elliptic, 5–25 × 4–12 mm, elliptic, entire to weakly crenate, weakly revolute, apex rounded or angled, not sharply acute, base cuneate to shortly attenuate, anterior lower surface often with prominently raised veins with sunken areas of lamina between, glabrous to densely pubescent with red sessile glands; petioles 0–4 mm
Morphology Reproductive morphology Inflorescences
Inflorescence condensed with ± 10-flowered verticils 0–5(–10) mm apart; cymes lax or fairly condensed, pedunculate with first branch diachasial producing two lateral cincinni, ± 8 mm long; peduncles 2–3 mm long; bracts lanceolate, ± 1 mm long, deciduous; pedicels 2 mm long
Morphology Reproductive morphology Flowers Calyx
Calyx 1.5–2 mm long, pubescent, with red sessile glands; fruiting calyx 3 mm long, tubular, bent with throat ± at right-angles to tube with mouth pointing upwards and with pedicel attached excentrically behind posterior lip; throat truncate; posterior lip elliptic, apex rounded to rounded-truncate, curving upwards, not decurrent; anterior lobes equal, lanceolate
Morphology Reproductive morphology Flowers Corolla
Corolla blue or purple-blue, (6–)8–11 mm long, almost glabrous, with scattered red sessile glands; tube 3–4 mm long, sigmoid, dorsally saccate at distal bend, annulate at base of saccate portion; posterior lip shorter than anterior;anterior lip 4–7 mm long, horizontal, cucullate, enclosing stamens
Morphology Reproductive morphology Flowers Androecium Stamens
Staminal filaments fused
Morphology Reproductive morphology Fruits
Nutlets brown shiny with reddish dots, ovoid, flattened, 1 mm long, producing mucilage speckled on outer surface.
Ecology
Rocks in grassland or steep slopes; 1850–2100 m
Conservation
Least concern; (EOO 175165 km2, 16 collections from 13 localities; AOO 110294 km2 with cell width 110.7 km, number of cells 9, 5 subpopulations based on adjacent cells; 4 subpopulations based on Rapoport distance)
Note
Differs from P. daviesii by the rounded to obtuse rather than acute leaf apex, shorter petioles (0–4 rather than 4–12 mm long) and fruiting calyx shorter with a tube bent at right angles and an ascending posterior lip rather than having a straight calyx with a horizontal posterior lip as in P. daviesii.
Distribution
Range: N Zambia and N Malawi Flora districts: K7 T5 T6 T7

Native to:

Kenya, Malawi, Tanzania, Zambia

Coleus nyikensis Baker appears in other Kew resources:

Date Reference Identified As Barcode Type Status
Brummitt, R.K. [WC199], Malawi Plectranthus malawiensis K000049025
Iwarsson, M. [967], Malawi Plectranthus malawiensis K000049024
Angus, A. [819], Zambia Plectranthus malawiensis K000049026
Whyte, A. [s.n.], Malawi Plectranthus malawiensis K000049021 Unknown type material
Iwarsson, M. [992], Malawi Plectranthus malawiensis K000049022
McClounie, J. [80], Malawi Plectranthus malawiensis K000049023
Lawton, R.M. [468], Zambia Plectranthus malawiensis K000049027

First published in D.Oliver & auct. suc. (eds.), Fl. Trop. Afr. 5: 439 (1900)

Not accepted by

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

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