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This species is accepted, and its native range is SW. 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, Njombe District: Ruhudje, Lupembe, Schlieben 185 (K!, holo. B, K!, LISC!, MO!, PRE!, iso.)
Morphology General Habit
Possibly perennial herb with fibrous roots and perhaps a rhizome, ± 0.3 m tall, not reported to be aromatic
Morphology Stem
Stems erect, quadrangular, sparsely branched, pubescent with patent glandular hairs and with sessile yellowish glands, with the indumentum similar on the inflorescence axis
Morphology Leaves
Leaves shortly petiolate, deflexedwith clusters of younger leaves or young shoots in axils; blades narrowly trullate, 10–15 × 5–7(–10) mm, crenate distally, entire below, sometimes weakly revolute, apex acute to obtuse, base cuneate to attenuate, pubescent and with pale gland dots; petioles 1–2 mm long
Morphology Reproductive morphology Inflorescences
Inflorescence lax, with 6–12-flowered verticils 5–25 mm apart; cymes 3–6-flowered, sessile; bracts lanceolate to ovate, 2 mm long, persistent, sometimes lowermost bracts leaf-like; pedicels 3–6 mm long
Morphology Reproductive morphology Flowers Calyx
Calyx 3 mm long, pubescent, with yellow sessile glands; fruiting calyx 5–6 mm long, deflexed, shortly tubular to slightly funnel-shaped with pedicel attached to the centre of the calyx base, throat truncate; posterior lip curving upwards, triangular, shortly decurrent; anterior lip with lateral lobes deltate at base and produced into a subulate tooth distally, median teeth lanceolate, subulate distally, longer than laterals
Morphology Reproductive morphology Flowers Corolla
Corolla blue, 9–10 mm long, villose, with inconspicuous sessile glands; tube 5–6 mm long, shallowly sigmoid, saccate at calyx throat; posterior lip ascending, ± equal to anterior or shorter; anterior lip 3–5 mm long, horizontal, cucullate, enclosing stamens and with a conspicuous fringe of hairs on margin
Morphology Reproductive morphology Flowers Androecium Stamens
Staminal filaments free, sometimes shortly fused at base, just below throat
Morphology Reproductive morphology Fruits
Nutlets brown with reddish speckles, slightly roughened, broadly ovoid, 1–1.5 mm long, not producing mucilage when wet
Figures
Fig 49: 5, 6, p 281
Ecology
Seasonally flooded areas; probably in montane grassland
Conservation
Possibly critically endangered; (EOO 10.2 km2, 3 collections from 3 localities; AOO 67.88 km2 with cell width 4.76 km, number of cells 3, 3 subpopulations based on adjacent cells; 1 subpopulation based on Rapoport distance; EOO suggests that this species could be critically endangered)
Distribution
Range: Not known elsewhere Flora districts: T7

Native to:

Tanzania

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

Date Reference Identified As Barcode Type Status
Schlieben, H.J. [185], Tanzania Plectranthus exilis K000975979 holotype
Schlieben, H.J. [185], Tanzania Plectranthus exilis K000975980 isotype

First published in PhytoKeys 129: 46 (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