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This species is accepted, and its native range is W. Tropical Africa to Ethiopia and Tanzania.
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: Tanzania, Kilimanjaro, Rua stream, Meyer 279 (B†, holo.)
Morphology General Habit
Shrub, 1–2.5 m tall
Morphology Stem
Stems erect, branching, quadrangular, or roundedquadrangular where woodier, pubescent with short downward-pointing eglandular hairs and red sessile glands
Morphology Leaves
Leaves opposite, petiolate; blades elliptic to narrowly elliptic to narrowly ovate, 5.5–17 × 2–7 cm, serrate, apex shortly acuminate, base cuneate and often shortly attenuate, upper and lower surfaces pubescent with short eglandular hairs, the hairs more plentiful on margins and venation, also with red sessile glands; petiole 1–3.5(–5) cm long, pubescent and with red sessile glands
Morphology Reproductive morphology Inflorescences
Inflorescence dense, when in flower forming a conical shape, often with a short extension with bracts and undeveloped buds at the tip, in fruit 40–70 × 20–30 mm; bracts subtending entire inflorescence narrowly ovate, 15–35 mm long, acute to acuminate, enclosing buds then becoming deflexed in flower, pubescent, persistent through flowering stage; bracts subtending single flowers linear, 4–5 mm long, pubescent, quite conspicuously ciliate
Morphology Reproductive morphology Flowers Calyx
Calyx with tube ± 1 mm long at anthesis, outer surface with varying amount of red sessile glands, occasionally sparsely pubescent, inner surface with 0.5 mm long triangular scales present between calyx lobes, these ciliate; lobes 5, subulate, ± equal, 2–5 mm long, glabrous or with sparse eglandular hairs near the base; fruiting calyx with tube 4–5 mm long, ventrally gibbous, lobes ± patent, lengthening to 4–9 mm
Morphology Reproductive morphology Flowers Corolla
Corolla purple to greenish white, 6–8 mm long; tube very narrow and parallel-sided for 3 mm, then curving sharply downwards and broadening for 2.5–3 mm before opening out into two lips; posterior lip shorter than anterior, 1.5 mm long, with occasional eglandular hairs and red sessile glands; anterior lip 3–3.5 mm long, 1.5 mm deep, with scattered eglandular hairs and red sessile glands on the front of lip
Morphology Reproductive morphology Flowers Androecium Stamens
Stamens connate for 1–1.5 mm, barely exserted
Morphology Reproductive morphology Fruits
Nutlets ± 1.5 mm long
Figures
Fig 66: 1–7, p 405
Ecology
Montane forest and associated bushland; 1500–3000 m
Conservation
Least concern; widely distributed
Note
Pycnostachys meyeri is a variable species with an extensive distribution. It differs mainly in the degree of pubescence of the leaves, and the calyx lobes, which can either be glabrous or with a few eglandular hairs. The length of the calyx lobes can also vary, but this is not correlated to the length of the calyx tube, which seems to be consistently 4–5 mm long in fruit. The small corolla is also a conservative character. This species shares a similar distribution to P. deflexifolia, although reaching further south, but differs from it due to its petiolate rather than subsessile leaves, its more glabrous corolla and its bracts that are less conspicuously ciliate. The more typical form has a small inflorescence, short calyx lobes (in fruit 4–5 mm), smallish leaves, and occurs across Kenya, Uganda and Tanzania, e.g. Verdcourt & Polhill 2972. However, there are also forms with longer hairier calyx lobes (in fruit 8–9 mm e.g. Greenway & Kanuri 13867); longer glabrous calyx lobes (e.g. Bally 8374, Dale 3381), and short hairier calyx lobes (e.g. Mwangulango, Phillipson & Rodgers 506). However, these overlap with the more typical form, vegetatively and in aspects of the inflorescence such as the corolla, therefore all are treated as one species.
Distribution
Range: Guinea, Nigeria, Bioko, Cameroon, Congo-Kinshasa (Ruwenzori), Rwanda and Ethiopia Flora districts: U2 U3 K3 K4 K5 K6 K7T2 T3 T6 T7

[FWTA]

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

Diagnostic
Similar to the last species (Pycnostachys eminii) but with stouter spikes of bluish-purple flowers.

Native to:

Burundi, Cameroon, Ethiopia, Guinea, Gulf of Guinea Is., Kenya, Nigeria, Rwanda, Sudan, Tanzania, Uganda, Zaïre

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

Date Reference Identified As Barcode Type Status
Sep 1, 2007 Mlangwa, J. [666], Tanzania Pycnostachys meyeri K000248149
Dec 1, 2003 Ghogue, J.-P. [1072], Cameroon Pycnostachys meyeri K000212644
May 1, 2001 Pollard, B.J. [147], Cameroon Pycnostachys meyeri K000051073
Dec 1, 2000 Pollard, B.J. [331], Cameroon Pycnostachys meyeri K000339428
Mar 1, 2000 Pollard, B.J. [342], Cameroon Pycnostachys meyeri K000339429
Oct 1, 1998 Buzgo, M. [661], Cameroon Pycnostachys meyeri K000339425
Oct 1, 1998 Cable, S. [3058], Cameroon Pycnostachys meyeri K000339421
Oct 1, 1998 Etuge, M. [3440], Cameroon Pycnostachys meyeri K000339427
Oct 1, 1998 Etuge, M. [2287], Cameroon Pycnostachys meyeri K000339422
Oct 1, 1998 Munyenyembe, P. [781], Cameroon Pycnostachys meyeri K000339423
Oct 1, 1998 Buzgo, M. [747], Cameroon Pycnostachys meyeri K000339426
Oct 1, 1998 Zapfack, L. [1111], Cameroon Pycnostachys meyeri K000339424
Jan 1, 1990 Linder, D.H. [3447], Cameroon Pycnostachys meyeri K000025083
Mar 1, 1939 Chevalier, A. [18853], Guinea Pycnostachys meyeri K000405728 holotype
Mar 1, 1939 Scott Elliot, G.F. [7883], Uganda Pycnostachys meyeri K000405980 Unknown type material
Greenway, P.J. [8737], Kenya Pycnostachys meyeri 11402.000
Bridson, D. [427], Rwanda Pycnostachys meyeri 41704.000
Bequaert [4490], Congo, DRC Pycnostachys meyeri K000405957 Unknown type material
Meyer [279], Tanzania Pycnostachys meyeri K000405982 Unknown type material
Volkens [823], Tanzania Pycnostachys meyeri K000405981 Unknown type material
Maitland, T.D. [643], Cameroon Pycnostachys meyeri K000025087
Dunlap [207], Cameroon Pycnostachys meyeri K000025094
Maitland, T.D. [1020], Cameroon Pycnostachys meyeri K000025090
Mann, G. [1222], Cameroon Pycnostachys meyeri K000025099
Johnston, H.H. [37], Cameroon Pycnostachys meyeri K000025093
Mann, G. [1960], Cameroon Pycnostachys meyeri K000025097
Bequaert [6325], Congo, DRC Pycnostachys meyeri K000405958 Unknown type material
Mildbraed, G. W. J. [10877], Cameroon Pycnostachys meyeri K000025096
Mann, G. [1222], Cameroon Pycnostachys meyeri K000025098
Keay, R.W.J. [28598], Cameroon Pycnostachys meyeri K000025091
Tanzania Pycnostachys volkensii 17448.000
Breteler, F.J. [MC 27], Cameroon Pycnostachys volkensii K000025102

First published in PhytoKeys 129: 73 (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.

Flora of Tropical East Africa
Flora of Tropical East Africa
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Flora of West Tropical Africa
Flora of West Tropical 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