1. Family: Lamiaceae Martinov
    1. Pycnostachys Hook.

      1. This genus is accepted, and its native range is Tropical & S. Africa, Madagascar.

    [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

    Habit
    Herbs or shrubs.
    Stem
    Stems erect, rarely scandent, quadrangular or roundedquadrangular where woody, most often pubescent and with red sessile glands
    Leaves
    Leaves simple, opposite or whorled in 3s or 4s
    Inflorescences
    Inflorescence thyrsoid, in flower narrowly conical, conical or ± capitate, becoming more cylindrical in fruit; flowers sessile in spirally arranged single-flowered cymes; bracts subtending entire inflorescence leaf-like, deflexed; bracts subtending single flowers persistent, conspicuous or inconspicuous, sometimes forming a coma at tip of inflorescence
    Calyx
    Calyx tubular, accrescent in fruit, 5-lobed, lobes ± subequal, subulate, becoming rigid and spinescent in fruit, thick hair or five scales present on the inner surface of the tube between the calyx lobes; scales if present closing over the developing nutlets, folding back to allow dispersal upon maturation
    Corolla
    Corolla blue to purple, pink or white; tube very narrow and parallel-sided then curving sharply downwards and broadening before opening into two lips; posterior lip shorter than the anterior, 4-lobed, the inner two lobes longer than the outer two; anterior lip boat
    Stamens
    Stamens 4, declinate, connate along their basal part until the posterior pair curves upwards sharply, anterior pair longer and curving upwards more gradually; anthers dorsifixed, synthecous
    Disc
    Disk with anterior lobe slightly longer than ovary, three posterior lobes shorter than ovary
    Ovary
    Ovary deeply 4-lobed; style gynobasic, longer than stamens, strongly upcurved, minutely bifid at apex
    Fruits
    Nutlets black or dark brown, broadly elliptic and slightly flattened, darkly gland-dotted, mucilaginous when wet
    Note
    It is traditional and convenient to segregate the species at the first dichotomy of the key on whether the leaves are petiolate or not. In most cases this is obvious, but a few species, such as P. reticulata and P. ruandensis do have very short petioles particularly on the older leaves, and these should be classed with the sessile leaves and if sometimes more than 5 mm long, they have been allowed for under both leads. P. stuhlmannii occasionally has long attenuate leaf bases and likewise this species is catered for under both leads. The species with sessile leaves may have the bases attenuate, and if the blade does extend to the base these should be assessed as sessile even if there is the appearance of a false petiole. P. urticifolia has been found in cultivation in East Africa.

    Images

    Distribution

    Native to:

    Angola, Botswana, Burundi, Cameroon, Cape Provinces, Central African Repu, Chad, Ethiopia, Free State, Ghana, Guinea, Gulf of Guinea Is., Kenya, KwaZulu-Natal, Madagascar, Malawi, Mozambique, Nigeria, Northern Provinces, Rwanda, Senegal, Sudan, Swaziland, Tanzania, Togo, Uganda, Zambia, Zaïre, Zimbabwe

    Pycnostachys Hook. appears in other Kew resources:

    Date Reference Identified As Barcode Type Status
    Wilde, J.J.F.E. de [8617], Cameroon K000070632

    First published in Exot. Fl. 3: t. 202 (1826)

    Accepted by

    • Govaerts, R. (2003). World Checklist of Selected Plant Families Database in ACCESS: 1-216203. The Board of Trustees of the Royal Botanic Gardens, Kew.

    Literature

    Flora of West Tropical Africa
    • E. A. Bruce in Kew Bull. 1939: 563.
    • Perkins in Notizbl. Bot. Gart. Berl. 8: 63 (1921)
    • —F.T.A. 5: 379
    Flora of Tropical East Africa
    • Fam. Gen. Vasc. Pl. 7: 267 (2004)
    • K.B. 1939: 563–593 (1940)
    • Exot. Fl. 3: t. 202 (1826)

    Sources

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

    Herbarium Catalogue Specimens
    'The Herbarium Catalogue, Royal Botanic Gardens, Kew. Published on the Internet http://www.kew.org/herbcat [accessed on Day Month Year]'. Please enter the date on which you consulted the system.

    Kew Backbone Distributions
    The International Plant Names Index and World Checklist of Selected Plant Families 2018. 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 2018. 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