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This species is accepted, and its native range is Tanzania to S. Tropical Africa.
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. Pycnostachys, G Bramleyshaped. Flora of Tropical East Africa. 2009

Type
Type: Congo-Kinshasa, Katanga, Munama, Quarré 1143 (BR!, holo. K!, iso.)
Morphology General Habit
Annual herb, 0.5–2 m tall, slightly woody near base
Morphology Stem
Stems pinkish, erect, quadrangular, pubescent with short downward-pointing eglandular hairs and red sessile glands, indumentum on younger stems and immediately below inflorescence more densely pubescent
Morphology Leaves
Leaves opposite but appearing whorled due to many axillary shoots, these often terminating in inflorescences, sessile or subsessile; blades very narrowly elliptic to lanceolate, 2.8–11 × 0.4–0.9 cm, narrowly attenuate down to the stem, with widely spaced serrations (top edge ± perpendicular to margin), apex acute, pubescent with short appressed eglandular hairs above and on the venation beneath, also with red sessile glands scattered above and dense beneath
Morphology Reproductive morphology Inflorescences
Inflorescence dense, when in flower forming a narrowly conical shape, in fruit, extending to 30–65 × 14–23 mm; bracts subtending entire inflorescence lanceolate, 12–20 mm long, acute, enclosing inflorescence when in bud then deflexed, indumentum as leaves, persistent through flowering stage; bracts subtending single flowers linear, ± 4 mm long, pubescent with short eglandular hairs, ciliate
Morphology Reproductive morphology Flowers Calyx
Calyx pale reddish to deep purple, tube ± 1 mm long at anthesis, outer surface with red sessile glands, also long eglandular hairs, these more conspicuous in fruit, inner surface with 0.5 mm long rounded-triangular or triangular scales present between calyx lobes, these shortly ciliate, with longer eglandular hairs on the lower surface and on the inner surface of the calyx tube; lobes 5, subulate, ± equal, ± 3 mm long, with red sessile glands and short glandular hairs around the bases; fruiting calyx with tube ± 3 mm long, ventrally gibbous, lobes patent to the tube, lengthening to 5–7 mm
Morphology Reproductive morphology Flowers Corolla
Corolla bright to dark blue, 5–6 mm long, with eglandular hairs and clear and red sessile glands; tube very narrow and parallelsided for 1.5–2 mm, then curving sharply downwards and broadening for ± 1.5 mm before opening into two lips; posterior lip ± equal in length to anterior, ± 2 mm long, the backs of lobes with more eglandular hairs and yellow and red sessile glands; anterior lip ± 2 mm long, ± 1 mm deep, dense eglandular hairs and yellow and red sessile glands on the front of lip
Morphology Reproductive morphology Flowers Androecium Stamens
Stamens connate for ± 0.5 mm, barely exserted
Morphology Reproductive morphology Fruits
Nutlets ± 1 mm long.
Ecology
Lake and stream side vegetation, Brachystegia woodland on red lateritic soil, gravelly soil or loam; ± 760–1800 m
Conservation
Least Concern: widely distributed over several countriesNOTE. Pycnostachys dewildemaniana is a common annual species, distinctive because of its small inflorescence and tiny corolla, and its narrow leaves. It is closely related to P. verticillata but distinct because its leaves are bigger, and its calyx lobes are longer, extending in fruit, with short glandular hairs near the lobe bases.
Distribution
Range: Congo-Kinshasa, Rwanda, Burundi, Zambia, Malawi and Zimbabwe Flora districts: T1 T4 T7 T8

Native to:

Burundi, Malawi, Rwanda, Tanzania, Zambia, Zaïre, Zimbabwe

Coleus dewildemanianus (Robyns & Lebrun) A.J.Paton appears in other Kew resources:

Date Reference Identified As Barcode Type Status
Jan 1, 2009 Pawek [2143], Malawi Pycnostachys dewildemaniana K000248693
Quarré, P. [1143] Pycnostachys dewildemaniana K000405730 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.

Literature

Kew Backbone Distributions

  • 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.

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