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This species is accepted, and its native range is SW. Tanzania to Zambia.

[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: Zambia, track opposite turning to Mbala [Abercorn ] Club, Richards 4353 (K!, holo.)
Morphology General Habit
Aromatic perennial herbs, 0.2–0.4 m tall, arising from a tuberous root system with tubers ovoid or cylindrical, 2 × 0.5–0.8 cm, sometimes reported as an annual, probably because tuber not collected
Morphology Stem
Stems erect or ascending, quadrangular, usually unbranched, pubescent to villose with retrorse short hairs and scattered longer hairs with hairs generally shorter on the inflorescence axis and occasionally glandular, and with red sessile glands
Morphology Leaves
Leaves ascending, petiolate, sometimes concentrated towards base of the plant, rarely with clusters of young leaves in axils; blades ovate, 15–40 × 10–20(–30) mm, serrate to more rarely laciniate, apex acute, base cuneate, sparsely pubescent to villose, with reddish glands; petioles 1–10 mm long
Morphology Reproductive morphology Inflorescences
Inflorescence lax with 10–15-flowered verticils up to 25 mm apart; cymes shortly pedunculate with peduncles 1–3(–7) mm long, 5–7-flowered with lateral cincinni less than 5 mm long; bracts few, erect above, cucullate, lanceolate, 1–2(–10) mm long, soon deciduous; pedicels 5–10 mm long
Morphology Reproductive morphology Flowers Calyx
Calyx 1–2 mm long, pubescent, with red sessile glands; fruiting calyx 6 mm long, tubular, slightly curved with pedicel attached excentrically behind the posterior lip; throat truncate; posterior lip elliptic to obovate, curving upwards, acute to rounded at apex, not or shortly decurrent, lateral lobes rounded, oblong; median lobes of anterior lip 4–5 mm long with teeth 1 mm long
Morphology Reproductive morphology Flowers Corolla
Corolla white to pale purple, 8–15 mm long, pubescent on lobes, with red sessile glands; tube 5–7 long, sigmoid, sigmoid part of tube largely not concealed by calyx; posterior lip erect, shorter than anterior; anterior lip 3–8 mm long, deeply cucullate enclosing stamens
Morphology Reproductive morphology Flowers Androecium Stamens
Staminal filaments fused
Morphology Reproductive morphology Fruits
Nutlets brown, speckled reddish, ovoid, 1 mm long, producing a small amount of mucilage
Figures
Fig 56: 6, p 334
Ecology
Grassland, woodland; 1500–2000 m
Conservation
Least concern; widely distributed
Note
The population recorded from Kasambara differs in having leaves larger and relatively broader than other populations, 2.5–3 × 2.5–3 cm.
Distribution
Range: Congo-Kinshasa, Zambia and Malawi Flora districts: T4 T7

Native to:

Malawi, Tanzania, Zambia, Zaïre

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

First published in PhytoKeys 129: 97 (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

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