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This species is accepted, and its native range is Tropical & S. Africa, Arabian Peninsula, S. India.
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
Lectotype chosen by Suddee & Paton, loc. cit. (2004): India, Deccan Peninsula, exact locality unknown [“Peninsula India Orientalis”], Herb. Wight in Wall. Cat. 2747B (K!, lecto. (Herb. Benth.), K-W!, isolecto.)
Morphology General Habit
Aromatic perennial succulent herb 0.4–2.5 m tall
Morphology Stem
Stems rounded-quadrangular below, quadrangular above, erect or ascending, more rarely scandent or prostrate, sometimes clump-forming, succulent, pinkish to dark red, producing short axillary shoots which can fall off to produce new plants, pubescent to tomentose with retrorse or patent eglandular hairs and with colourless or yellowish sessile glands
Morphology Leaves
Leaves spreading or deflexed, succulent, with young shoots in axils, sessile; blades elliptic to obovate, 1.2–6 × 0.5–2.2 cm, crenate, serrate or dentate, weakly revolute, apex obtuse to rounded, base attenuate, densely pubescent to tomentose, withyellowish sessile glands; petiole indistinguishable from attenuate base
Morphology Reproductive morphology Inflorescences
Inflorescence lax in fruit with 10–40-flowered verticils touching or up to 30 apart in fruit; cymes sessile, 5–20-flowered, with first branch dichasial and producing 2 lateral cincinni; bracts ovate to elliptic, 2–4 mm long, erect above forming a small inconspicuous terminal coma, soon deflexed and deciduous before fruiting, rarely persistent; pedicels 2–3 mm long, slightly flattened, straight or slightly curved distally
Morphology Reproductive morphology Flowers Calyx
Calyx 1.5 mm long, densely tomentose with white hairs and with yellowish or orange sessile glands; fruiting calyx 2–3 mm long, shortly tubular with pedicel attached excentrically behind the posterior lip; throat truncate; posterior lip narrowly elliptic, purplish, slightly hooded or flat, horizontal, not decurrent; lobes of anterior lip equal, lanceolate with a deep slit between the median lobes
Morphology Reproductive morphology Flowers Corolla
Corolla white marked blue or violet to violet, 3–5 mm long, with scattered hairs and yellowish sessile glands on lobes; tube 2–2.5 mm long, sigmoid; posterior lip erect, shorter than anterior lip; anterior lip 1–2 mm long, shallowly cucullate, horizontal
Morphology Reproductive morphology Flowers Androecium Stamens
Staminal filaments free, shortly exceeding anterior lip
Morphology Reproductive morphology Fruits
Nutlets brown shiny with reddish dots, broadly elliptic, flattened, 1 mm long, producing lots of mucilage speckled on outer surface.
Ecology
Rock outcrops, dry Acacia-Commiphora bushland and dry evergeeen bushland; (250–)500–2400 m
Conservation
Least concern; widely distributed
Note
Close to P. pseudomarrubioides on account of the free stamens, calyx shape and structure and habit. Differs  in shorter corollas, more distinctly petiolate leaves and often more erect habit.
Distribution
Range: Congo-Kinshasa, Rwanda, Burundi, Sudan, Ethiopia, Eritrea, Somalia, Angola, Zambia, Malawi, Mozambique, Zimbabwe, Botswana and southern Africa, Arabian Peninsula, Socotra Flora districts: U1 U2 K1 K2 K3 K4 K6 K7 T1 T2 T3 T5

Native to:

Angola, Botswana, Burundi, Congo, Djibouti, Eritrea, Ethiopia, India, Kenya, KwaZulu-Natal, Malawi, Mozambique, Namibia, Northern Provinces, Oman, Rwanda, Saudi Arabia, Socotra, Sudan, Swaziland, Tanzania, Uganda, Yemen, Zambia, Zaïre, Zimbabwe

Coleus cylindraceus (Hochst. ex Benth.) A.J.Paton appears in other Kew resources:

Date Reference Identified As Barcode Type Status
Jan 1, 1983 Schimper, W. [1925], Ethiopia Plectranthus cylindraceus K000431905 isotype
Jan 1, 1983 Schimper, W. [1925], Ethiopia Plectranthus cylindraceus K000431903 holotype
Drummond, R.B. [2943], Tanzania Plectranthus cylindraceus 11396.000
Gillett, J.B. [14108], Kenya Plectranthus cylindraceus 2769.000
Plectranthus cylindraceus 33628.000
Brummitt [10256] Plectranthus cylindraceus 39386.000
Collenette, S. [2959], Saudi Arabia Plectranthus cylindraceus 47784.000
Leach, L.C., Zimbabwe Plectranthus cylindraceus 5526.000
Mathew, B. [6136], Kenya Plectranthus cylindraceus 6049.231
Mathew, B. [6040], Kenya Plectranthus cylindraceus 6049.237
Collenette, S. [8784], Saudi Arabia Plectranthus cylindraceus 63158.000
Schimper, W. [1113], Ethiopia Plectranthus cylindraceus K000431900 holotype
Welwitsch [5489], Angola Plectranthus cylindraceus K000430734 Unknown type material
Wood, J.M. [4475], South Africa Plectranthus cylindraceus K000430841 Unknown type material
Schimper, W. [1113], Ethiopia Plectranthus cylindraceus K000431901 isotype
Wood, J.M. [3955], South Africa Plectranthus cylindraceus K000430840 holotype
Schimper, W. [146], Ethiopia Plectranthus cylindraceus K000431904
Jan 1, 2011 Collenette [8784], Saudi Arabia Plectranthus montanus K000735214
Nov 11, 2009 Staples [1296], Hawaii Plectranthus montanus K000248893
Jan 1, 2003 Wight [2747], India Plectranthus montanus K000820120 lectotype
Jan 1, 2000 Burtt, B.L. et al. [18348] Plectranthus montanus K000939118
Röttler, J.P. [22], India Plectranthus montanus K000820118
s.coll. [Cat. no. 2747], India Plectranthus montanus K001117006
Mooney, H.F. [4144], India Plectranthus montanus K000939121
s.coll. [Cat. no. 2747] Plectranthus montanus K001117007
Meeblod, A. [13738], India Plectranthus montanus K000939120
Gossweiler, J. [4340], Angola Plectranthus montanus K001008898
Meeblod, A. [13738], India Plectranthus montanus K000939119
Plectranthus spiciformis 17453.000
Ash [612], Ethiopia Plectranthus marrubioides 42930.000
Collenette, J.S. [4328], Saudi Arabia Plectranthus marrubioides 46464.000
Collenette, J.S. [9306], Saudi Arabia Plectranthus marrubioides 58513.000
Mathew, B. [6016], Kenya Plectranthus marrubioides 6049.189

First published in PhytoKeys 129: 37 (2019)

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.

Literature

Kew Backbone Distributions

  • Audru, J., Cesar, J. & Lebrun, J.-P. (1994). Les Plantes Vasculaires de la République de Djibouti. Flore Illustrée 1: 1-336. CIRAD, Départerment d'Elevage et de Médecine vétérinaire, Djibouti.
  • Calane da Silva, M., Izdine, S. & Amuse, A.B. (2004). A Preliminary Checklist of the Vascular Plants of Mozambique: 1-184. SABONET, Pretoria.
  • 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.
  • Sita, P. & Moutsambote, J.-M. (2005). Catalogue des plantes vasculaires du Congo, ed. sept. 2005: 1-158. ORSTOM, Centre de Brazzaville.

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