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This species is accepted, and its native range is Tropical & S. Africa, Madagascar.
Plectranthus bojeri


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: Madagascar, Bojer s.n. (P!, holo. W, iso.)
Morphology General Habit
Annual or short-lived perennial herbs, sometimes reported as fleshy, 0.1–1(–2) m tall, arising from a taproot, variously reported as aromatic or not
Morphology Stem
Stems erect or ascending, sometimes creeping at base and rooting adventitiously, quadrangular, branched or unbranched, sometimes prominently marked purple, sparsely pubescent to villose with retrorse and scattered or dense, longer, patent eglandular hairs, and with red sessile glands, very rarely with glandular hairs
Morphology Leaves
Leaves petiolate; blades sometimes purplish, sometimes very thin, ovate to rhombic or deltate, 0.8–12 × 2.2–7(–11.5) cm, crenate to serrate, sometimes deeply so, sometimes weakly revolute, apex acute to rounded, base cuneate to truncate or auriculate but attenuate at petiole, pubescent or sparsely so and with reddish sessile glands; petiole 5–65(–110) mm long
Morphology Reproductive morphology Inflorescences
Inflorescence usually lax, sometimes condensed in flower with (6–)10–30-flowered verticils 3–45 mm apart; cymes sessile, rarely with very short peduncles, (3–)5–15-flowered with lateral cincinni to 25(–45) mm long; bracts erect above, slightly cucullate, 2–6 mm long, becoming deflexed and deciduous, sometimes lowermost persistent and leaf-like; pedicels 2–5 mm long
Morphology Reproductive morphology Flowers Calyx
Calyx 1–2 mm long, pubescent, with red sessile glands; fruitingcalyx 3–5 mm long, tubular slightly constricted at throat, slightly curved, with pedicel attached excentrically behind the posterior lip; throat truncate; posterior lip elliptic, curving upwards, acute to rounded at apex, not or shortly decurrent, lateral lobes rounded, oblong, median lobes of anterior lip linear, equal or just exceeding posterior lip, 2–3 mm long with 0.5 mm long teeth
Morphology Reproductive morphology Flowers Corolla
Corolla pale blue to purple, 3–10(–12) mm long, pubescent on lobes, with red sessile glands; tube 2–5 mm long, sigmoid, anteriorly gibbous at first bend, dorsally gibbous at second, sigmoid part of tube concealed or not; posterior lip erect or reflexed, shorter than anterior; anterior lip 1.5–5(–7) mm long, 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.
Grassland, woodland, open rocky areas, forest clearings, disturbed ground; 700–2100 m
Least concern; widely distributed
This treatment of P. autranii, P. dupuisii and P. bojeri differs substantially from that of Codd (1985). Codd’s concept of S. rotundifolius is the same as that used here. However, Codd’s concept of S. latifolius is here represented by P. autrani and P. dupuisii. The annual P. bojeri ( P. latifolius) as delimited here, appears to be absent from the area covered by Codd. In addition to the difference in underground parts, P. bojeri in the north of its range has a fruiting calyx 3–4 mm, whereas in P. dupuisii it is 4–5 mm long. In the south of its range P. bojeri tends to have petioles longer than 20 mm, whereas P. dupuisii has petioles up to 20 mm long. P. dupuisii and P. bojeri display a large range of variation in Congo-Kinshasa. While a full revision of the group in Congo-Kinshasa is needed, the type material from that country is provisionally listed under one or other of the species as it would seem to fall within the range of variation seen in eastern and southern Africa. Underground parts are extremely important in separating P. bojeri, P. dupuisii and P. rotundifolius. P. bojeri is an annual with a fibrous root system and no perennating organs. P. rotundifolius has a fibrous root system with small annually replaced tubers, and P. dupuisii has a conspicuous woody or fleshy rootstock, though this may be less evident in shrubby forms which are not subjected to fires. Underground parts are poorly collected and seldom appear on herbarium sheets. This can make identification difficult, the difference between P. dupuisii and P. rotundifolius being the most problematic. Most specimens lack peduncles. Radcliffe-Smith, Pope & Goyder 5678 has one cyme with peduncles to 25 mm, Chancellor 113 from U 1 has consistently long peduncles, 10–20 mm long. Material of P. bojeri from Tanzania and further south differs from many Ugandan and Kenyan specimens by having larger, deltate, auriculate leaves with petioles exceeding 20 mm, corollas 5–10 not 3–8 mm, and fruiting calyces often 4–5 mm rather than 3–4 mm. However, there is no clear discontinuity in these characters, therefore only one species is recognized.
Range: Widespread in tropical and southern Africa and in Madagascar Flora districts: U1 U2 U3 U4 K2 K3 K4 K5 T1 T2 T4 T5 T7 T8


Labiatae, J. K. Morton. Flora of West Tropical Africa 2. 1963

Morphology General Habit
An erect, or rarely creeping, branched annual herb up to 3 ft. high
Morphology Reproductive morphology Inflorescences
Cylindrical inflorescences of violet flowers
Amongst rocks.

Native to:

Benin, Burkina, Burundi, Cameroon, Cape Provinces, Central African Repu, Congo, Eritrea, Ethiopia, Gabon, Ghana, Guinea, Ivory Coast, Kenya, KwaZulu-Natal, Madagascar, Malawi, Mali, Mozambique, Nigeria, Northern Provinces, Rwanda, Senegal, Sierra Leone, Sudan, Swaziland, Tanzania, Togo, Uganda, Zambia, Zaïre, Zimbabwe

Coleus bojeri Benth. appears in other Kew resources:

Date Reference Identified As Barcode Type Status
May 23, 2013 Andrianantoanina [45], Madagascar Plectranthus bojeri K000735984
May 17, 2012 Barbosa [5294], Mozambique Plectranthus bojeri K000938041
Jan 1, 2012 Jansen [3546], Ethiopia Plectranthus bojeri K000735619
Aug 1, 1995 Baron, R. [2250], Madagascar Plectranthus bojeri K000430816 holotype
Aug 1, 1995 Madagascar Plectranthus bojeri K000430818 syntype
Lyall [330], Madagascar Plectranthus bojeri K000430817
Bidgood, S. [5683], Tanzania Plectranthus bojeri K000468741
Jan 1, 1960 Ujor, E.U. [FHI 29985], Cameroon Solenostemon latifolius K000025040
Milne-Redhead, E. [10111], Tanzania Solenostemon latifolius 27435.000
Brummitt, R.K. [9745], Malawi Solenostemon latifolius 33490.000
Gillett, S. [2], Cameroon Solenostemon latifolius K000025039

First published in Labiat. Gen. Spec.: 52 (1832)

Not accepted by

  • Govaerts, R. (1999). World Checklist of Seed Plants 3(1, 2a & 2b): 1-1532. MIM, Deurne. [Cited as Plectranthus bojeri.]
  • 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 bojeri.]


Kew Backbone Distributions

  • Berhaut, J. (1975). Flore illustrée du Sénégal 4: 1-625. Gouvernement du Sénégal, Ministère du développement rural direction des eaux et forêta, Dakar.
  • Brunel, J.F., Hiepo, P. & Scholz, H. (eds.) (1984). Flore Analytique du Togo Phanérogames: 1-751. GTZ, Eschborn.
  • Calane da Silva, M., Izdine, S. & Amuse, A.B. (2004). A Preliminary Checklist of the Vascular Plants of Mozambique: 1-184. SABONET, Pretoria.
  • 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.
  • Paton, A.J., Bramley, G., Ryding, O., Polhill, R.M., Harvey, Y.B., Iwarsson, M., Otieno, D., Balkwill, K., Phillipson, P.B., Harley, R.M. & Willis, F. (2013). Flora Zambesiaca 8(8): 1-346. Royal Botanic Gardens, Kew.
  • Sita, P. & Moutsambote, J.-M. (2005). Catalogue des plantes vasculaires du Congo, ed. sept. 2005: 1-158. ORSTOM, Centre de Brazzaville.
  • Sosef, M.S.M. & al. (2006). Check-list des plantes vasculaires du Gabon Scripta Botanica Belgica 35: 1-438.
  • Thiombiano, A., Schmidt, M., Dressler, S., Ouédraogo, A., Hahn, K. & Zizka, G. (2012). Catalogue des plantes vasculaires du Burkina Faso Boissiera 65: 1-391.

Flora of Tropical East Africa
Flora of Tropical East Africa

Flora of West Tropical Africa
Flora of West Tropical Africa

Herbarium Catalogue Specimens
Digital Image © Board of Trustees, RBG Kew

Kew Backbone Distributions
The International Plant Names Index and World Checklist of Selected Plant Families 2021. Published on the Internet at and
© Copyright 2017 World Checklist of Selected Plant Families.

Kew Names and Taxonomic Backbone
The International Plant Names Index and World Checklist of Selected Plant Families 2021. Published on the Internet at and
© Copyright 2017 International Plant Names Index and World Checklist of Selected Plant Families.

Kew Science Photographs
Digital Image © Board of Trustees, RBG Kew