e-Key v3 - Ancylanthos
SANBI Flora Keys Logo
Interactive keys to the identification of seed plants of southern Africa using keys based on plant morphology.

Rubiaceae - Antirheoideae - Vanguerieae - Ancylanthos Desf.

Description :

  • Shrubs or shrublets, rigid, tomentose
  • Leaves opposite, rarely 3-nate, shortly petiolate, lanceolate or elliptic, somewhat paler on undersurface; stipules connate into a sheath, densely hairy within, distinctly subulate-caudate at apex
  • Flowers solitary or in few- to several-flowered, simple or branched, peduncled, pubescent to tomentose cymes; bracts small
  • Calyx 5-lobed, hairy; lobes much longer then saucer-shaped tube
  • Corolla 5-lobed, yellow or orange-yellow, hairy; lobes ovate or ovate-lanceolate, reflexed, shorter than tube; tube elongate, slightly curved, with a ring of reflexed hairs near base within throat
  • Stamens 5, arising in corolla throat, mainly included; filaments broadly linear, much shorter than anthers; anthers lanceolate-linear
  • Disc annular
  • Ovary 5-locular, with a single pendulous ovule in each locule; style slender, glabrous, shortly exserted, pollen presenter large, cylindrical, shortly 5-lobed at apex
  • Fruit a fleshy, globose drupe crowned with calyx limb, with 5 pyrenes

Nomenclature:

  • Ancylanthos Desf.
    • Desfontaines: 5 (1818) as Ancylanthus
    • Robyns: 324 (1928)
    • Phillips: 734 (1951)
    • Launert: 7 (1966)
    • Verdcourt & Bridson: 800 (1991)
    • Bridson: 236 (1998)

Distribution & Notes:

  • Global : Species 5, tropical Africa
  • Southern Africa : Species 1: Ancylanthos rubiginosus Desf., Namibia and Botswana

References:

  • BRIDSON, D.M. 1998. Rubiaceae . Flora zambesiaca 5,2
  • DESFONTAINES, R.L. 1818. Ancylanthos . Mémoirs de Muséum Nationale d' Histoire Naturelle 4
  • LAUNERT, E. 1966. Rubiaceae . Prodromus einer Flora von Südwestafrika 115
  • PHILLIPS, E.P. 1951. The genera of South African flowering plants. Memoirs of the Botanical Survey of South Africa No. 25
  • ROBYNS,W. 1928. Monographieae Vangueriae . Bulletin du Jardin Botanique de l'Etat, à Bruxelles 11
  • VERDCOURT, B. & BRIDSON, D.M. 1991. Flora of tropical East Africa . Rubiaceae (part 3)