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This species is accepted, and its native range is N. 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
Typus: Tanzania, Pare District: Mkomazi Game Reserve, Kisima Hill, Abdallah, Mboya & Vollesen 96/129 (K!, holo. C, NHT!, P, iso.)
Morphology General Habit
Perennial succulent subshrub ± 1 m tall
Morphology Stem
Stems quadrangular, ± erect, sometimes with conspicuous leaf scars, densely pubescent to tomentose with patent and retrorse eglandular hairs and red sessile glands
Morphology Leaves
Leaves succulent, shortly petiolate with young leaves in axils; blades ovate, 2.5–6 × 1.5–3 cm, crenate, apex rounded or obtuse, base cuneate to truncate, densely pubescent to tomentose with eglandular and sometimes glandular hairs and with red and clear sessile glands; petiole 2–7(–10) mm long
Morphology Reproductive morphology Inflorescences
Inflorescence simple or sparsely branched, dense, with 8–20-flowered verticils usually touching adjacent verticils but sometimes up to 10(–15) mm apart at the base of the inflorescence; bracts subtending 4–10-flowered, sessile or shortly circinnate cymes; bracts ovate, 3–4 mm long, soon deciduous, glabrous abaxially, pubescent on margins and adaxial surface, with red sessile glands; pedicels 2–3(–4) mm long
Morphology Reproductive morphology Flowers Calyx
Calyx 1–2 mm long, villose or pubescent, with red sessile glands; fruiting calyx 3–4 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 or obovate, acute at apex, curving upwards, shortly decurrent; anterior lobes lanceolate with median lobes slightly longer and narrower than lateral
Morphology Reproductive morphology Flowers Corolla
Corolla pink, pale purple or lavender, 6–9 mm long, pubescent with hairs and red sessile glands on lobes; tube 2–4 mm long, sigmoid or shallowly so; posterior lip shorter than anterior; anterior lip 3–5 mm long, horizontal, concave, enclosing stamens or stamens just exserted
Morphology Reproductive morphology Flowers Androecium Stamens
Staminal filaments free
Morphology Reproductive morphology Fruits
Nutlets brown shiny with reddish dots, broadly elliptic in outline, flattened, 1 mm long, producing lots of mucilage speckled on outer surface.
Ecology
Rocks or cliffs or rocky areas in grassland; 1100–1750 m
Conservation
Possibly threatened; (EOO 16001 km2, 8 collections from 7 localities; AOO 7028 km2 with cell width 34.23 km, number of cells 6, 5 subpopulations based on adjacent cells; 1 subpopulation based on Rapoport distance. EOO area suggests a vulnerable status but species prefers open areas and it was recorded as common at type locality ( Abdallah et al. 96/129))
Note
Close to P. hadiensis but differing in having petioles mostly less than 7 mm long and a condensed inflorescence with adjacent verticils mostly touching. P. confertiflorus also tends to be a more woody plant sometimes with conspicuous leaf scars on old stems.
Distribution
Range: Not known elsewhere Flora districts: T3 T6

Native to:

Tanzania

Coleus confertiflorus (A.J.Paton) A.J.Paton appears in other Kew resources:

Date Reference Identified As Barcode Type Status
Abdallah, R. [96/129], Tanzania Plectranthus confertiflorus K000431972 Unknown type material

First published in PhytoKeys 129: 35 (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.

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