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

[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
Types: Ethiopia, Sagan, Riva 1564 (B†, syn. FT, isosyn.) & Harar, Ellenbeck 965 (B†, syn.)
Morphology General Habit
Aromatic soft-wooded shrub 1–3 m tall
Morphology Stem
Stems succulent, leafy or sometimes leafless when flowering, ascending or often scandent, rounded-quadrangular, freely branching with epidermis wrinkled, often blackish or deep purple and sometimes with prominent leaf scars, glabrous or hoary with short antrorse or retrorse hairs, soon becoming pubescent on the inflorescence axis with short antrorse or patent, sometimes yellowish eglandular hairs and with red sessile and shortly stalked pale glands, rarely reported to produce a red dye when crushed
Morphology Reproductive morphology Inflorescences
Inflorescences terminal on long shoots; verticils laxly disposed, 4–16-flowered, with bracts subtending 2–8-flowered, sessile cymes; bracts 1–2 mm long, inconspicuous, erect above forming an inconspicuous apical coma; pedicels 4–12 mm long in flower, not noticeably lengthening in fruit
Morphology Reproductive morphology Flowers Calyx
Calyx 3–4 mm long, pubescent, with red sessile glands; fruiting calyx 6–8 mm long, shortly tubular with pedicel attached centrally to calyx base; throat truncate, with an annulus of long weak hairs not obscuring nutlets; posterior lip obovate, mucronate at apex, curving upwards, decurrent; lateral lobes midway between the posterior lip and median lobes, lanceolate; median lobes lanceolate, slightly longer than lateral lobes, subulate at apex
Morphology Reproductive morphology Flowers Corolla
Corolla purple or white with the anterior lip purple or blue with posterior lip white with blue or purple markings, 13–20 mm long, sparsely pubescent, with red and pale sessile glands; tube 5–9 mm long, parallel-sided at base, sigmoid; posterior lip shorter than anterior; anterior lip 9–15 mm long, ascending, cucullate, enclosing stamens
Morphology Reproductive morphology Flowers Androecium Stamens
Staminal filaments fused at base
Morphology Reproductive morphology Fruits
Nutlets 1.5–2 mm long, broadly obovoid, slightly flattened, pale brown speckled reddish brown, becoming black when mature, ± smooth, producing copious speckled mucilage when wet.
Ecology
Scrub or thicket on rocky slopes or dry riverbeds; 900–2000 m
Conservation
Least concern; widely distributed
Note
P. puberulentus is most likely to be confused with P. gillettii which is very closely related. The distinguishing characteristics are given in the abbreviated description of P. gillettii below.
Morphology General
Also similar to P igniarius but differing in the shorter fruiting calyx which has an annulus of long weak hairs at the throat Non-fruiting specimens of P puberulentus can be distinguished from P igniarius by the crenate leaves
Morphology Leaves
The leaves of P igniarius, when present, are entire or sinuate. Leaves usually deciduous before flowering with small, often yellowish, shoot apices or young leaves in axils; blades elliptic, obovate or trullate, 1–4 × 0.5–2.5 cm, crenate, weakly revolute, apex round or obtuse, base cuneate or attenuate, tomentose with white or yellowish hairs and with red sessile glands, discolorous, paler with indumentum denser beneath, reported to produce red dye when crushed; petioles 5–8 mm long
Distribution
Range: Burundi, Ethiopia, and Somalia Flora districts: U1 K1 K2 K3 K4 K5 K6 K7 T1 T2 T3 T5 T7

Native to:

Burundi, Ethiopia, Kenya, Somalia, Tanzania, Uganda

Coleus gracilis Gürke appears in other Kew resources:

Date Reference Identified As Barcode Type Status
May 16, 2013 Kindeketa, W.J. et al. [2902], Tanzania Plectranthus puberulentus K000735942
May 16, 2013 Kindeketa, W.J. et al. [2902], Tanzania Plectranthus puberulentus K000735941
Bidgood, S. [6259], Tanzania Plectranthus puberulentus K000468166
Bidgood, S. [6193], Tanzania Plectranthus puberulentus K000468231

First published in Bot. Jahrb. Syst. 38: 170 (1906)

Not accepted by

  • Govaerts, R. (1999). World Checklist of Seed Plants 3(1, 2a & 2b): 1-1532. MIM, Deurne. [Cited as Plectranthus puberulentus.]
  • 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 puberulentus.]
  • Hedberg, I., Kelbessa, E., Edwards, S., Demissew, S. & Persson, E. (eds.) (2006). Flora of Ethiopia and Eritrea 5: 1-690. The National Herbarium, Addis Ababa University, Ethiopia & The Department of Systematic Botany, Upps. [Cited as Plectranthus puberulentus.]
  • 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 puberulentus.]

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.
  • Thulin, M. (ed.) (2006). Flora of Somalia 3: 1-626. The Royal Botanic Gardens, Kew.

Flora of Tropical East Africa
Flora of Tropical East Africa
http://creativecommons.org/licenses/by-nc-sa/3.0

Herbarium Catalogue Specimens

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