1. Family: Lamiaceae Martinov
    1. Platostoma P.Beauv.

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

    [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

    Habit
    Annual or perennial herbs, with stems arising from a taproot, slender rhizome or small woody rootstock, not or scarcely aromatic
    Stem
    Stems prostrate, ascending or erect
    Leaves
    Leaves opposite, petiolate; upper leaves sometimes basally pale or coloured
    Flowers
    Flowers hermaphrodite, arranged in mostly more than 3-flowered verticils in a lax to dense inflorescence; bracts usually coloured
    Calyx
    Calyx bilabiate, rounded in cross-section; upper lip with 1 or 3 lobes with the posterior lobe decurrent or not; anterior lip with 1–5 lobes, variously arranged; fruiting calyx with the throat open to closed to varying degrees, see note below
    Corolla
    Corolla white, pink or bluish to purple, bilabiate, short; tube dorsally gibbous, curved slightly downwards, dilating at throat, pubescent to densely villose within; posterior lip erect, 3–4-lobed, median lobes slightly smaller; anterior lip ± linear, slightly cucullate, horizontal, becoming deflexed
    Stamens
    Stamens 4, declinate or spreading, shortly exserted; filaments pubescent, posterior basally swollen, attaching to corolla below midpoint of tube, anterior attaching above midpoint of the tube; anthers orbicular, dorsifixed, synthecous
    Disc
    Disk 4-lobed with anterior lobe slightly larger
    Ovary
    Ovary glabrous or pubescent at apex, deeply 4-lobed; style gynobasic, bifid
    Fruits
    Nutlets black, obovoid, with minute longitudinal ridges and a small white basal scar, sometimes pubescent at apex, not producing mucilage when wet
    Note
    The genus has been broadened by Paton, loc. cit. (1997) to include Acrocephalus sensu stricto (most species in Africa formerly placed in Acrocephalus are now referred to Haumaniastrum), Geniosporum, Limniboza and Octomeron. The East African species are represented in each of the three subgenera and several subdivisions:

    Images

    Distribution

    Native to:

    Angola, Assam, Bangladesh, Benin, Borneo, Burkina, Burundi, Cambodia, Cameroon, Central African Repu, Chad, China South-Central, China Southeast, Congo, East Himalaya, Equatorial Guinea, Eritrea, Ethiopia, Gabon, Ghana, Guinea, Guinea-Bissau, Gulf of Guinea Is., Hainan, India, Ivory Coast, Jawa, Kenya, Laccadive Is., Laos, Lesser Sunda Is., Liberia, Madagascar, Malawi, Malaya, Mali, Maluku, Mozambique, Myanmar, Nepal, New Guinea, Nigeria, Northern Provinces, Philippines, Queensland, Rwanda, Senegal, Sierra Leone, Sri Lanka, Sudan, Sulawesi, Sumatera, Swaziland, Taiwan, Tanzania, Thailand, Togo, Uganda, Vietnam, West Himalaya, Zambia, Zaïre, Zimbabwe

    Platostoma P.Beauv. appears in other Kew resources:

    First published in Fl. Oware 2: 61 (1818)

    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
    • F.T.A. 5: 349, as Platystoma.
    • Fl. Oware 2: 61 (1818)
    Flora of Tropical East Africa
    • Kubitzki, Fam. Gen. Vasc. Pl. 7: 263 (2004)
    • K.B. 52: 257–292 (1997)
    • B.J.B.B. 17: 15 (1943)
    • Fl. Owar. 2: 61, t. 95 (1818)

    Sources

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

    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