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This species is accepted, and its native range is E. DR Congo to Uganda.
A specimen from Kew's Herbarium


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

Morphology Reproductive morphology Flowers Calyx
Calyx with tube 0.5–1.5 mm long at anthesis, outer surface with eglandular hairs and red sessile glands, inner surface with 0.5 mm longtriangular scales present between calyx lobes, these pubescent on outer surface, densely so on the inner surface; lobes 5, subulate, ± equal, 1–2 mm long, with eglandular hairs, becoming glabrous near apex; fruiting calyx with tube 2.5–3 mm long, ventrally gibbous, the scales enlarging to ± 1 mm, particularly conspicuous when they close over and protrude from the calyx mouth before the nutlets reach maturity, lobes patent, somewhat recurved, broad at the base, becoming spiny near the apex, 2.5–3 mm long
Morphology Reproductive morphology Flowers Corolla
Corolla blue to pink or purple, 8–11 mm long, with red sessile glands; tube very narrow and parallel-sided for 4–5 mm, then curving sharply downwards and broadening for 2–2.5 mm before opening out into two lips; posterior lip shorter than anterior, ± 1 mm long, with eglandular hairs; anterior lip 3–4 mm long, 1.5–2 mm deep, with eglandular hairs
Morphology Reproductive morphology Flowers Androecium Stamens
Stamens connate for ± 1.5 mm, exserted for 1–1.5 mm
Morphology Reproductive morphology Fruits
Nutlets 1–1.5 mm long.
Cultivated areas and slopes, dry rocky ridges, near bamboo forest; 1700–2750 m
Known only from one district in Uganda, but persisting in cultivated areas and present in adjoining countries; possibly threatened
Pycnostachys erici-rosenii is closely related to P. eminii, and is especially similar vegetatively. However, it can be distinguished by its calyx, the lobes of which have shortish eglandular hairs and are therefore dissimilar in appearance to those of P. eminii, which have long, tangled hairs in the lower half, the fruiting inflorescence appearing tomentose, with the glabrous, spinescent lobe tips emerging. The scales in the calyx of P. erici-rosenii are also distinctive, as they enlarge so that they protrude conspicuously when they are closed over the calyx mouth. Both P. erici-rosenii and P. eminii have very short calyx lobes, a feature that distinguishes them from P. goetzenii.
Type: Congo-Kinshasa, Ninagongo, 2000 m, R.E. Fries 1588 (UPS!, holo.)
Morphology General Habit
Shrub 1–3.5 m tall
Morphology Stem
Stems erect, branching, quadrangular, or roundedquadrangular where woodier, pubescent and with red sessile glands
Morphology Leaves
Leaves opposite, petiolate; blades narrowly ovate, 5–13 × 2–4.5 cm, crenate-serrate, apex acute and often acuminate, base cuneate or ± rounded to shortly attenuate, sometimes asymmetric, with red sessile glands, upper surface with adpressed eglandular hairs, lower surface pubescent with erect eglandular hairs, sometimes densely so; petiole 8–35 mm long, pubescent with eglandular hairs and with red sessile glands
Morphology Reproductive morphology Inflorescences
Inflorescence dense, when in flower forming a narrowly conical shape, in fruit 30–40 × 12–15 mm; bracts subtending entire inflorescence purple, narrowly ovate, 15–40 mm long, acute to acuminate, enclosing buds then becoming deflexed in flower, pubescent with short eglandular hairs, persistent through flowering stage; bracts subtending single flowers linear-lanceolate, 4–5 mm long, pubescent and ciliate
Range: Congo-Kinshasa, Rwanda and Burundi Flora districts: U 2 (Kigezi);

Native to:

Burundi, Rwanda, Uganda, Zaïre

Coleus erici-rosenii (R.E.Fr.) A.J.Paton appears in other Kew resources:

Date Reference Identified As Barcode Type Status
Robyns, W. [2356], Burundi Pycnostachys erici-rosenii K000405953 Unknown type material
Fries, R.E. [1588], Congo, DRC Pycnostachys erici-rosenii K000405955 Unknown type material
Bequaert [6087], Congo, DRC Pycnostachys erici-rosenii K000405954 Unknown type material

First published in PhytoKeys 129: 44 (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. Scientific Data 8: 215.

Flora of Tropical East Africa
Flora of Tropical East 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.