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This species is accepted, and its native range is Tanzania (Ukaguru Mountains).
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, Kilosa District: Ukaguru, Mamiwa Forest Reserve, E of Ikwamba peak, Mabberley 1465 (K!, holo.)
Morphology General Habit
Perennial herb 0.3–0.5 m tall with stems arising from a horizontal rhizome, variously described as foetid or hardly aromatic
Morphology Stem
Stems erect, quadrangular, glabrous below, pubescent above with antrorse eglandular hairs and red sessile glands, with short patent, glandular hairs on the inflorescence axis
Morphology Leaves
Leaves ascending, petiolate; blades rhombic, 1.5–5 × 1.5–3.5 cm, crenate above midline, entire below; apex acute to right-angled, base attenuate, sparsely pubescent, with red sessile glands; petiole 10–35 mm long
Morphology Reproductive morphology Inflorescences
Inflorescence lax with 10–12-flowered opposite cymes; cymes lax, pedunculate with first branch dichasial producing two lateral cincinni, 25–30 mm long in fruit; peduncle 15–30 mm long; bracts ovate, to 5 mm long, deciduous; pedicel 2–3 mm long
Morphology Reproductive morphology Flowers Calyx
Calyx 3 mm long, pubescent, with red sessile glands; fruiting calyx spreading, 6 mm long, tubular, straight and with pedicel attached excentrically behind posterior lip; throat truncate; posterior lip oblong to obovate, acute to obtuse at apex, slightly curving upwards, hardly decurrent; lobes of anterior lip ± equal, lanceolate, apex acute
Morphology Reproductive morphology Flowers Corolla
Corolla blue, 7 mm long, glabrous or sparsely pubescent on lobes with scattered red sessile glands; tube 3–3.5 mm long, shallowly sigmoid; anterior lip 3–4 mm long, horizontal or deflexed, slightly cucullate enclosing stamens, or not
Morphology Reproductive morphology Flowers Androecium Stamens
Stamens with anterior filaments fused for a short distance; posterior filaments free
Morphology Reproductive morphology Fruits
Nutlets brown with reddish dots, broadly ovoid, 1.5 mm long, not producing mucilage.
Ecology
Mountain forest on steep slopes, sometimes epiphytic on tree trunks; 1700–2100 m
Conservation
Critically endangered; possible habitat decline; (EOO 1.7 km2, 4 collections from 3 localities; AOO 2.55 km2 with cell width 0.92 km, number of cells 3, 3 subpopulations based on adjacent cells; 2 subpopulations based on Rapoport distance)
Distribution
Flora districts: Known only from the Ukaguru Mts Flora districts: T6

Native to:

Tanzania

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

Date Reference Identified As Barcode Type Status
Mabberley, D.J. [1465], Tanzania Plectranthus dichotomus K000431980 Unknown type material

First published in PhytoKeys 129: 40 (2019)

Accepted by

  • Govaerts, R., Nic Lughadha, E., Black, N., Turner, R. & Paton, A. (2021). The World Checklist of Vascular Plants, a continuously updated resource for exploring global plant diversity. https://doi.org/10.1038/s41597-021-00997-6 Scientific Data 8: 215.

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