Skip to main content
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. Flora of Tropical East Africa. 2009

Type
Type: Malawi, Shire Highlands, Nakajumbu, Buchanan 365 (K!, holo.)
Morphology General Habit
Aromatic perennial suffrutex with 1–few stems arising from a woody rootstock with tuberous roots, 0.3–0.6 m tall.
Vegetative Multiplication Tubers
Tubers 2–15 cm long, 3–15 mm in diameter, cylindrical
Morphology Stem
Stems erect, rounded-quadrangular, often pink or purplish, usually leafless when flowering, viscid, pubescent with patent glandular and eglandular hairs and pale sessile glands
Morphology Leaves
Leaves mostly restricted to young sterile shoots, sometimes present on young flowering shoots, ascending, petiolate or sessile; blades elliptic or broadly so, 1.5–12 × 0.6–6.5 cm, serrate, rounded at apex, attenuate at base, pubescent, with pale and some reddish sessile glands; petioles 0–12(–40) mm long
Morphology Reproductive morphology Inflorescences
Inflorescence lax with verticils 20–40 mm apart; verticils 10–16-flowered, composed of opposite, ± sessile 5–8-flowered cymes with peduncles less than 1 mm long but more rarely up to 10 mm long on young flowering shoots; bracts narrowly ovate, 2–4 mm long, often soon deciduous; pedicels 10–15 mm long, often curved
Morphology Reproductive morphology Flowers Calyx
Calyx 3 mm long, pubescent, with transparent and sometimes some reddish sessile glands; fruiting calyx 6–8(–9) mm long, tubular, slightly curved, not conspicuously constricted towards throat and with pedicel attached excentrically behind posterior lip; throat truncate; posterior lip obovate, curving upwards, shortly decurrent, acute to obtuse at apex; lobes of anterior lip lanceolate, ± equal or with the median lobes slightly longer and narrower
Morphology Reproductive morphology Flowers Corolla
Corolla yellow, dull mauve or bluish, 15–22 mm long; tube 5–7 mm long, sigmoid; posterior lip much shorter than anterior lip; anterior lip 10–15 mm long, strongly cucullate, enclosing stamens, pubescent, with scattered pale sessile glands
Morphology Reproductive morphology Flowers Androecium Stamens
Staminal filaments fused
Morphology Reproductive morphology Fruits
Nutlets brown shiny with reddish gland dots, broadly obovoid, flattened, 1.5 mm long, producing lots of mucilage speckled on outer surface.
Ecology
Grassland or open woodland in areas prone to burning, sometimes among rocks; 950–2400 m
Conservation
Least concern; widely distributed
Note
Richards 1602 and Hutchinson & Gillett 3988, from Zambia, are anomalous in being scandent shrubs (probably not burned). This taxon does not occur in Ethiopia as cited by Morton in Fl. Eth. 5: 596 (2006), where most specimens cited as that species are P. xylopodus
Distribution
Flora districts: T1 T4 T7 Range: Burundi, Zambia, Malawi and Zimbabwe

Native to:

Burundi, Malawi, Tanzania, Zambia, Zaïre, Zimbabwe

Coleus buchananii (Baker) Brenan appears in other Kew resources:

Date Reference Identified As Barcode Type Status
Camerson, K.J. [60], Malawi Plectranthus buchananii K000431995
Buchanan [365], Malawi Plectranthus buchananii K000431996 Unknown type material

First published in Mem. New York Bot. Gard. 9: 43 (1954)

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.

Not accepted by

  • Govaerts, R. (1999). World Checklist of Seed Plants 3(1, 2a & 2b): 1-1532. MIM, Deurne. [Cited as Plectranthus buchananii.]
  • Govaerts, R. (2003). World Checklist of Selected Plant Families Database in ACCESS: 1-216203. The Board of Trustees of the Royal Botanic Gardens, Kew. [Cited as Plectranthus buchananii.]
  • 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. [Cited as Plectranthus buchananii.]

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