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This species is accepted, and its native range is Eritrea to N. Tanzania, SW. Arabian Peninsula.
Plectranthus lanuginosus

[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 by Ryding in E.J. 122: 227 (2000): Ethiopia, Adua, Schimper III. 1915 (K!, lecto.; BM!, FT, KIEL, UPS, W, isolecto.)
Morphology General Habit
Aromatic somewhat fleshy perennial herb 0.3–1 m tall, to 2.5 m if supported, with a single or very few stems arising from a branched taproot
Morphology Stem
Stems usually trailing, scandent or prostrate, quadrangular, sometimes reddish, freely branched, often fleshy, sometimes rooting adventitiously at base, villose with patent, often purplish, glandular and eglandular hairs, becoming more glandular and denser on the inflorescence axis and with red sessile glands
Morphology Leaves
Leaves fleshy, spreading, petiolate; blades triangular, 1.5–7(–10) × 1–6(–10) cm, crenate or serrate, weakly revolute and sometimes reddish at margins, apex obtuse, base truncate, subcordate or very broadly cuneate, pubescent to villose, with numerous sessile glands beneath; petiole (5–)10–30 mm long
Morphology Reproductive morphology Inflorescences
Inflorescence lax, with 6–10(–12)-flowered verticils up to 30 mmapart; cymes 3–5(–6)-flowered, sessile or very shortly cincinate; bracts elliptic, shortly apiculate, up to 5 mm long, erect above forming an inconspicuous terminal coma, deciduous before anthesis, pubescent, with red sessile glands; pedicels 3–6 mm long
Morphology Reproductive morphology Flowers Calyx
Calyx 3–4 mm long, villose with purplish hairs and red sessile glands; fruiting calyx 5–6(–7–9) mm long, shortly tubular, slightly curved with pedicel attached excentrically behind posterior lip; throat truncate; posterior lip elliptic to obovoid, mucronate to almost spinescent at apex, purplish, shortly decurrent, curving upwards; anterior lobes lanceolate with median lobes slightly longer and narrower than lateral
Morphology Reproductive morphology Flowers Corolla
Corolla blue, blue marked purple, purple or mauve, (8–)11–13(–16) mm long, lobes with purplish hairs and red sessile glands; tube (3–)5–6 mm long, sigmoid, slightly saccate at distal bend; posterior lip shorter than anterior, usually reflexed towards tube; anterior lip (5–)6–9(–12) mm long, finally horizontal, concave, enclosing stamens or stamens just exserted
Morphology Reproductive morphology Flowers Androecium Stamens
Staminal filaments fused for a very short distance
Morphology Reproductive morphology Fruits
Nutlets brown or black, shiny with dark dots, broadly elliptic in outline, flattened, 1–1.5 mm long, producing mucilage speckled on outer surface.
Ecology
Rock outcrops in grassland or forest, also in other open areas in forest such as roadsides and streams; 1500–2400 m
Conservation
Least concern; widely distributed
Note
Plectranthus schimperi VatkeSome specimens from around the Mathew’s Range in K 1 have the anterior lip of the corolla 12 mm long and a large fruiting calyx 7–9 mm long. Some Ethiopian material has similarly large flowers. Similar to P. gymnostomus from which it can be separated by having trailing stems and corollas less than 13 mm long.
Distribution
Range: Congo-Kinshasa, Rwanda, Ethiopia, Eritrea, Somalia, introduced in E Zimbabwe Flora districts: U2 K1 K2 K3 K4 K6 K7 T2 T3

Native to:

Eritrea, Ethiopia, Kenya, Rwanda, Somalia, Sudan, Tanzania, Uganda, Yemen, Zaïre

Introduced into:

Zimbabwe

Coleus lanuginosus Hochst. ex Benth. appears in other Kew resources:

Date Reference Identified As Barcode Type Status
Jun 1, 2013 Kindeketa, W. et al. [2577], Tanzania Plectranthus lanuginosus K000938032
May 17, 2013 Tiyoy [1301], Uganda Plectranthus lanuginosus K000938048
Sep 1, 2007 Rwaburindore [4804], Uganda Plectranthus lanuginosus K000248144
Jan 1, 2000 Gillett, J.B. [5348], Ethiopia Plectranthus lanuginosus K000431918 neotype
Jan 1, 1986 Schimper, W. [618], Ethiopia Plectranthus lanuginosus K000431914 isotype
Hepper, N. [7032], Kenya Plectranthus lanuginosus 42111.000
Schimper, W. [347], Ethiopia Plectranthus lanuginosus K000431916
Schimper, W. [1915], Ethiopia Plectranthus lanuginosus K000431915
Schweinfurth, G. [1810], Ethiopia Plectranthus lanuginosus K000431919 Unknown type material
Lort Phillips [s.n.], Somalia Plectranthus lanuginosus K000431920 Unknown type material
Schimper, W. [1915], Ethiopia Plectranthus lanuginosus K000431917

First published in A.P.de Candolle, Prodr. 12: 79 (1848)

Accepted by

  • Paton, A.J., Mwanyambo, M. Govaerts, R.H.A., Smitha, K., Suddee, S., Phillipson, P.B., Wilson, T.C., Forster, P.I. & Culham, A. (2019). Nomenclatural changes in Coleus and Plectranthus (Lamiaceae): A tale of more than two genera PhytoKeys 129: 1-158.

Not accepted by

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

Literature

Kew Backbone Distributions

  • 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.
  • 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

Kew Science Photographs
Digital Image © Board of Trustees, RBG Kew http://creativecommons.org/licenses/by/3.0/