1. Family: Rubiaceae Juss.
    1. Oxyanthus DC.

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

    [FTEA]

    Rubiaceae, B. Verdcourt. Flora of Tropical East Africa. 1976

    Habit
    Shrubs to small trees or rarely lianes, often sweetly scented in dry state
    Leaves
    Leaves petiolate; domatia often present as hairy tufts in the nerve axils; stipules green in dry state, usually somewhat coriaceous, erect, persistent, sometimes ± connate at base
    Flowers
    Flowers hermaphrodite, 5-merous, subsessile to pedicellate in lax or contracted, elongate (sometimes raceme-like) or corymbose panicles, lateral at successive nodes; bracteoles scarcely to well developed
    Calyx
    Calyx-tube turbinate to ellipsoid or somewhat cylindrical; limb with distinct tubular part and short to long, usually narrow lobes
    Corolla
    Corolla white; tube long, very narrowly tubular, the throat glabrous to sparsely pubescent; lobes narrow, contorted, overlapping to the left
    Stamens
    Stamens fully or partly exserted, attached at the throat; anthers sessile or subsessile, apiculate or acuminate, sometimes prolonged at the base into sterile appendages
    Pollen
    Pollen-grains in tetrads
    Disc
    Disc annular
    Style
    Style very slender, glabrous, exserted, with a small club-shaped or fusiform swelling (stigmatic club) bearing 2 stigmatic lips at its apex
    Ovary
    Ovary 1–2-locular, but the 2 locules are practically confluent, the two placentas joined only at the extremities; ovules very numerous, not immersed in the fleshy placentas
    Fruits
    Fruit globose, ellipsoid or fusiform, ± fleshy in life, sometimes crowned with the persistent calyx-limb
    Seeds
    Seeds sometimes held together with placental tissue, compressed-ellipsoid, quite large, 4–8 mm. long; testa ornamented with concentric horseshoe-shaped to fingerprint-like striations.
    [FZ]

    Rubiaceae, D.M.Bridson & B.Verdcourt. Flora Zambesiaca 5:3. 2003

    Habit
    Shrubs, small trees or occasionally dwarf single-stemmed shrubs, rarely rhizomatous, the vegetative parts often sweet-scented in the dry state.
    Leaves
    Leaves petiolate; domatia often present as tufts of hairs in the nerve axils or as lines of hairs along the midrib just above and/or below the nerve axils; stipules green in the dry state, usually somewhat coriaceous, erect, persistent, sometimes ± connate at base.
    Inflorescences
    Inflorescences only one per node on alternate sides at successive nodes (see TAB. 75/6) and 1 per branch or 1–several per branch for each season’s growth, lax or contracted, of elongate (catkin-like when very young) or corymbose panicles; bracts/bracteoles lanceolate to narrowly ovate or filiform to subulate from a triangular base; peduncles short; bractelets similar to bracts but smaller or absent.
    Flowers
    Flowers hermaphrodite, 5-merous, subsessile to pedicellate.
    Calyx
    Calyx tube turbinate to ellipsoid or somewhat cylindrical; limb-tube short to long; lobes usually narrow.
    Corolla
    Corolla white; tube very narrowly cylindrical, the throat glabrous to sparsely pubescent; lobes narrow, contorted, overlapping to the left.
    Stamens
    Stamens fully or partly exserted, attached within the throat; anthers sessile or subsessile, apiculate or with an acuminate appendage at apex, sometimes prolonged at the base into sterile appendages; pollen grains in tetrads.
    Disc
    Disk annular.
    Pistil
    Ovary 1–2-locular, but the 2 locules ± confluent, the 2 placentas joined only at the extremities; ovules very numerous, not immersed within the fleshy placentas; style very slender, glabrous; pollen presenter exserted, small club-shaped or fusiform, bearing 2 stigmatic lips at its apex.
    Fruits
    Fruit globose, ellipsoid or fusiform, ± fleshy in life, sometimes crowned with the persistent calyx limb.
    Seeds
    Seeds usually free but sometimes held together with placental tissue, compressed-ellipsoid, quite large, 4–8 mm long; testa ornamented with concentric horseshoe-shaped to fingerprint-like striations.

    Images

    Distribution

    Native to:

    Angola, Benin, Burkina, Burundi, Cabinda, Cameroon, Cape Provinces, Central African Repu, Chad, Congo, Equatorial Guinea, Ethiopia, Gabon, Gambia, Ghana, Guinea, Guinea-Bissau, Gulf of Guinea Is., Ivory Coast, Kenya, KwaZulu-Natal, Liberia, Malawi, Mali, Mozambique, Nigeria, Northern Provinces, Rwanda, Senegal, Sierra Leone, Somalia, Sudan, Swaziland, Tanzania, Togo, Uganda, Zambia, Zaïre, Zimbabwe

    Oxyanthus DC. appears in other Kew resources:

    Date Reference Identified As Barcode Type Status
    Troupin, G. [3780], Congo, DRC 898.000
    Troupin, G. [3866], Congo, DRC 899.000
    Cable, S. [1891], Cameroon K000339335

    First published in Ann. Mus. Hist. Nat. 9: 218 (1807)

    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
    • K. Schum. in E. & P. Pflanzenfam. 4, 4: 78 (1891).
    • —F.T.A. 3: 106
    Flora Zambesiaca
    • Sonké in Opera Bot. Belg. 8: 1–106 (1999).
    • Bridson in F.T.E.A., Rubiaceae: 526 (1988).
    • N. Hallé, Fl. Gabon, no. 17, Rubiacées (2e partie): 186 (1970).
    • Keay in Bull. Jard. Bot. État 28: 42 (1958).
    • in Ann. Mus. Hist. Nat. Paris 9: 218 (1807).
    Flora of Tropical East Africa
    • N. Hallé, Fl. Gabon, 17, Rubiacées, 2: 186 (1970)
    • Keay in B.J.B.B. 28: 42 (1958)
    • in Ann. Mus. Hist. Nat. Paris 9: 218 (1807)

    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.

    Kew Backbone Distributions
    The International Plant Names Index and World Checklist of Selected Plant Families 2019. 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 2019. 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