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This species is accepted, and its native range is E. Central Tropical Africa (Virunga Mountains).
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: Rwanda, Virunga Mts, Goetzen 98 (B†, holo.)
Morphology General Habit
Shrub 1.5–5 m tall, apex herbaceous
Morphology Stem
Stems erect, branching, quadrangular, or rounded-quadrangular where woodier, pubescent with very short adpressed eglandular hairs and red sessile glands
Morphology Leaves
Leaves opposite, petiolate; blades narrowly ovate, 6–13 × 2–5 cm, closely crenate-serrate, apex acuminate, base obtuse or rounded, sometimes asymmetrically so, with red sessile glands, pubescent with very short adpressed eglandular hairs, these scattered above and more plentiful on margins and venation beneath, venation conspicuous; petiole 12–30 mm long, pubescent and with red sessile glands
Morphology Reproductive morphology Inflorescences
Inflorescence dense, when in flower forming a conical shape, tapering at the apex and becoming lax, in fruit 45–80 × 15–22 mm; bracts subtending entire inflorescence narrowly ovate, 15–25 mm long, acute, enclosing buds then becoming deflexed in flower, pubescent, persistent through flowering stage; bracts subtending single flowers linear, 5 mm long, pubescent, ciliate
Morphology Reproductive morphology Flowers Calyx
Calyx with tube ± 1 mm long at anthesis, outer surface with short adpressed eglandular hairs and yellow and red sessile glands, inner surface with 0.5 mm long triangular scales present between calyx lobes; lobes 5, subulate and ± equal, 4–5 mm long, with very short hairs near the base; fruiting calyx with tube 4–5 mm long, ventrally gibbous, lobes patent but slightly recurved, becoming thicker and more rigid, 6–9 mm
Morphology Reproductive morphology Flowers Corolla
Corolla blue to purple, 13–14 mm long, with scattered very shortadpressed eglandular hairs and red and yellow sessile glands; tube very narrow and parallel-sided for ± 4 mm, then curving sharply downwards and broadening for ± 4 mm before opening out into two lips; posterior lip shorter than anterior, ± 2 mm long; anterior lip 6–7 mm long, 3–4 mm deep
Morphology Reproductive morphology Flowers Androecium Stamens
Stamens connate for ± 2 mm, exserted for 1–2 mm
Morphology Reproductive morphology Fruits
Nutlets not seen.
Ecology
Bamboo- Hypericum forest; dry rocky ridge with grass and shrubs; 2600–3300 m
Conservation
In a protected area but possibly threatened due to small area and encroachment
Note
Apparently endemic to the Virunga mountains, P. goetzenii can be recognised by the lax extension to the inflorescence and the very short pubescence on the lower leaf surface and calyx. In addition, it often has an asymmetric leaf base. Probably closest to P. erici-rosenii from which it can be distinguished by its tapered inflorescence axis, lack of conspicuous scales and longer, less pubescent calyx lobes.
Distribution
Range: Rwanda and Congo-Kinshasa (Virunga Mts). Flora districts: U 2 (Virunga Mts)

Native to:

Rwanda, Uganda, Zaïre

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

Date Reference Identified As Barcode Type Status
Lebrun, J. [5006], Congo, DRC Pycnostachys vulcanicola K000405956 Unknown type material
Jan 1, 2004 D'Arcy, W.G. [7523], Rwanda Pycnostachys goetzenii K000467385
Jan 1, 2004 Stauffer, H.U. [230], Congo, DRC Pycnostachys goetzenii K000467386
Dec 1, 1993 Rogers, C.G. [343 A], Uganda Pycnostachys goetzenii K000467391
Dec 1, 1993 Purseglove, J.W. [3714], Uganda Pycnostachys goetzenii K000467394
Dec 1, 1993 Hedberg, O. [2263], Uganda Pycnostachys goetzenii K000467395
Dec 1, 1993 Stauffer, H.U. [605], Uganda Pycnostachys goetzenii K000467392
Dec 1, 1993 Eggeling, W.J. [1069], Uganda Pycnostachys goetzenii K000467393
Oct 1, 1946 Williams, J. [5067], Uganda Pycnostachys goetzenii K000467390
Sep 1, 1946 Purseglove, J.W. [2153], Uganda Pycnostachys goetzenii K000467396
Feb 1, 1939 Snowder, J.D. [1582], Uganda Pycnostachys goetzenii K000467398
Feb 1, 1939 Snowder, J.D. [1582], Uganda Pycnostachys goetzenii K000467399
Aug 24, 1938 Thomas, A.S. [2427], Uganda Pycnostachys goetzenii K000467397
Lebrun, J. [7470], Congo, DRC Pycnostachys goetzenii K000467387
Louis, J. [5428], Congo, DRC Pycnostachys goetzenii K000467388
Troupin, G. [16246], Rwanda Pycnostachys goetzenii K000467389
Linder, D.H. [2145], Uganda Pycnostachys goetzenii K000467400

First published in PhytoKeys 129: 50 (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