1. Family: Gentianaceae Juss.
    1. Exacum L.

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

    [FZ]

    Gentianaceae, J. Paiva & I. Nogueira. Flora Zambesiaca 7:4. 1990

    Habit
    Annual herbs or rarely perennial.
    Stem
    Stems erect simple or branched, 4-ridged, glabrous.
    Leaves
    Leaves, linear-lanceolate, narrowly elliptic to ovate or ovate-elliptic, entire, 3–7 nerved.
    Flowers
    Flowers 4–5 merous, in teminal or axillary 2-or 3-chotomous cymes.
    Calyx
    Calyx 4–5 lobed to the middle or nearly to the base.
    Corolla
    Corolla regular or somewhat zygomorphic, with a short, campanulate or broadly cylindrical tube; lobes 4–5, spreading.
    Stamens
    Stamens 4–5, inserted below the sinuses; anthers opening by terminal pores prolonged into longitudinal slits during the dehiscence, not twisted.
    Pistil
    Ovary subglobose, bilocular; ovules numerous; style subulate; stigma capitate.
    Fruits
    Capsule subglobose or obovoid, septicidally bivalved.
    Seeds
    Seeds numerous, subglobose-polyhedric; testa faveolate.
    [FTEA]

    Gentianaceae, Sileshi Nemomissa. Flora of Tropical East Africa. 2002

    Habit
    Annual or shortly perennial monocarpic herbs
    Stem
    Stem branched or unbranched, conspicuously 4-angled
    Leaves
    Leaves opposite, with (1–)3–7(–9) parallel nerves converging at base
    Inflorescences
    Inflorescences terminal or axillary, dichotomously branched cymes, sometimes flowers solitary
    Flowers
    Flowers 4–5-merous, regular or irregular, blue to violet, sometimes white
    Calyx
    Calyx divided to the base, zygomorphic, winged at the keel, wings finely veined
    Corolla
    Corolla tube campanulate or broadly cylindrical
    Stamens
    Filaments inserted on the corolla tube; anthers dehiscing by apical pores which extend gradually into longitudinal slits
    Pistil
    Ovary bilocular with axial placentation; ovules numerous; style filiform, subulate; stigma capitate, bilobed
    Fruits
    Capsule ellipsoid to obovoid, septicidally dehiscing, breaking open at base of style, bivalved
    Seeds
    Seeds numerous; surface reticulate-pitted.

    Images

    Distribution

    Native to:

    Angola, Assam, Bangladesh, Benin, Borneo, Burundi, Cambodia, Cameroon, Central African Repu, Chad, China South-Central, China Southeast, Comoros, Congo, East Himalaya, Ghana, Guinea, Guinea-Bissau, Gulf of Guinea Is., India, Ivory Coast, Jawa, Kenya, Laos, Lesser Sunda Is., Madagascar, Malawi, Malaya, Mali, Mauritius, Mozambique, Myanmar, Namibia, Nepal, New Guinea, Niger, Nigeria, Northern Provinces, Northern Territory, Oman, Philippines, Rodrigues, Senegal, Sierra Leone, Socotra, Sri Lanka, Sudan, Sulawesi, Sumatera, Tanzania, Thailand, Tibet, Togo, Uganda, Vietnam, West Himalaya, Yemen, Zambia, Zaïre, Zimbabwe

    Exacum L. appears in other Kew resources:

    Date Reference Identified As Barcode Type Status
    McWhirter, J. [226], Madagascar 32230.000

    First published in Sp. Pl.: 112 (1753)

    Accepted by

    • Govaerts, R. (2001). World Checklist of Seed Plants Database in ACCESS E-F: 1-50919.

    Literature

    Flora of West Tropical Africa
    • —F.T.A. 4, 1: 545.
    Flora Zambesiaca
    • Gen. Pl., ed. 5: 51 (1754).
    • Sp. Pl. 1: 112 (1753)
    Flora of Tropical East Africa
    • Klack. in Opera Bot. 84: 32 (1985)
    • G.P. 2: 803 (1876)
    • L., Gen. Pl., ed. 5: 51 (1754)
    • Sp. Pl. 1: 112 (1753)

    Sources

    Flora Zambesiaca
    Flora Zambesiaca
    http://creativecommons.org/licenses/by-nc-sa/3.0

    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.

    Interactive Key to Seed Plants of Malesia and Indo-China
    The Malesian Key Group (2010) Interactive Key to Seed Plants of Malesia and Indo-China (Version 2.0, 28 Jul 2010) The Nationaal Herbarium Nederland Leiden and The Royal Botanic Gardens Kew

    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