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  1. Family: Rubiaceae Juss.
    1. Genus: Spermacoce L.
      1. Spermacoce senensis (Klotzsch) Hiern

        This species is accepted, and its native range is Ethiopia to S. Africa.

    [FZ]

    Rubiaceae, B. Verdcourt. Flora Zambesiaca 5:1. 1989

    Habit
    Annual unbranched or sparsely branched erect or straggling herb (3)16–60 cm. tall, with 4-ribbed stems ± densely covered with spreading white hairs.
    Leaves
    Leaf blades 2–7 x 0.35–2.2 (2.7) cm., narrowly elliptic to elliptic-lanceolate, acute at the apex, narrowly cuneate at the base, with ± long hairs on both surfaces and scabrid at the margins; true petiole absent; stipule sheath 3 mm. long, densely hairy, with 7 setae 0.2–1.1 cm. long.
    Flowers
    Flowers in clusters at the nodes, up to 1.5–2 cm. in diam. in fruiting stage.
    Calyx
    Calyx tube 2.5 mm. long, subcylindric, hairy above; lobes 4, ± equal, 2–4 x 0.2–0.8 mm., mostly lanceolate or narrowly oblong, scabrid on the margins.
    Corolla
    Corolla white, sometimes with mauve streaks reaching into the throat; tube 3–8 mm. long, funnel-shaped; lobes 1.5–4.5 x 1–3 mm., triangular, pubescent at the apex outside.
    Filaments
    Filaments exserted 1–3 mm.
    Style
    Style exserted 1–3.5 mm.
    Fruits
    Capsule pale, often streaked red-brown, 3 x 2 mm., ellipsoid, densely hairy.
    Seeds
    Seeds pale chestnut-coloured to deep blackish red, 2.6–2.8 x 1.2–1.7 x 0.8–1 mm., oblong-ellipsoid, with a deep narrow ventral groove, covered with a fine shallow reticulation.
    [FTEA]

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

    Habit
    Annual unbranched or sparsely branched herb (3–)16–60 cm. tall, with 4-ribbed stems ± densely covered with spreading white hairs.
    Leaves
    Leaf-blades narrowly elliptic to elliptic-lanceolate, 2–7 cm. long, 0.35–2.2 cm. wide, acute at the apex, narrowly cuneate at the base, with ± long hairs on both surfaces and scabrid at the margins; true petiole absent; stipule-sheath 3 mm. long, densely hairy, with 7 setae 0.2–1.1 cm. long.
    Flowers
    Flowers in clusters at the nodes, up to 1.5–2 cm. in diameter in fruiting stage.
    Calyx
    Calyx-tube subcylindric, 2.5 mm. long, hairy above; lobes 4, ± equal, mostly lanceolate or narrowly oblong, 2–4 mm. long, 0.2–0.8 mm. wide, scabrid on the margins.
    Corolla
    Corolla white, sometimes with mauve streaks reaching into the throat, tube funnel-shaped, 3–8 mm. long; lobes triangular, 1.5–4.5 mm. long, 1–3 mm. wide, pubescent at the apex outside.
    Filaments
    Filaments exserted 1–3 mm.
    Style
    Style exserted 1–3.5 mm.
    Fruits
    Capsule pale, often streaked red-brown, ellipsoid, 3 mm. long, 2 mm. wide, densely hairy.
    Seeds
    Seeds pale chestnut-coloured to deep blackish red, oblong-ellipsoid, 2.6–2.8 mm. long, 1.2–1.7 mm. wide, 0.8–1 mm. thick, with a deep narrow ventral groove, covered with a fine shallow reticulation.
    Figures
    Fig. 51/23, p. 344.
    Habitat
    Bare ground, grassland, scrub and woodland, often on sandy soil and on rocky hillsides; (150–)400–1600 m.
    Distribution
    K1 K4 K7 T1 T2 T3 T4 T5 T6 T7 T8 South West Africa and South Africa

    Images

    Distribution

    Native to:

    Angola, Botswana, Burundi, Caprivi Strip, Ethiopia, Kenya, KwaZulu-Natal, Malawi, Mozambique, Namibia, Northern Provinces, Swaziland, Tanzania, Zambia, Zimbabwe

    Synonyms

    Common Names

    English
    Buttonweed

    Other Data

    Spermacoce senensis (Klotzsch) Hiern appears in other Kew resources:

    Date Reference Identified As Barcode Type Status
    Jul 28, 2004 Luke, P. A. [9308], Tanzania K000172821
    Stolz, A. [1971], Tanzania K000173011 isotype
    Welwitsch [3223], Angola K000173027 Unknown type material
    Drege [s.n.], South Africa K000422857
    Dehn, G. [98], Zimbabwe K000173028 isotype
    Dehn, G. [98], Zimbabwe K000173029 isotype

    Bibliography

    First published in D.Oliver & auct. suc. (eds.), Fl. Trop. Afr. 3: 236 (1877)

    Accepted by

    • Figueiredo, E. & Smith, G.F. (2008). Plants of Angola Strelitzia 22: 1-279. National Botanical Institute, Pretoria.
    • Calane da Silva, M., Izdine, S. & Amuse, A.B. (2004). A Preliminary Checklist of the Vascular Plants of Mozambique: 1-184. SABONET, Pretoria.
    • 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

    Kew Backbone Distributions

    • Ruhsam, M in Ruhsam, M. (2005). Survey of all the Rubiaceae specimens at the Royal Botanic Gardens, Kew.

    Flora of Tropical East Africa

    • Hiern in Flora of Tropical Africa 3: 236 (1877).

    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.
    Digital Image © Board of Trustees, RBG Kew http://creativecommons.org/licenses/by/3.0/

    Kew Backbone Distributions
    The International Plant Names Index and World Checklist of Selected Plant Families 2020. 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 2020. 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

    Plants and People Africa
    Common Names from Plants and People Africa http://www.plantsandpeopleafrica.com/
    © Plants and People Africa http://www.plantsandpeopleafrica.com http://creativecommons.org/licenses/by/3.0/