e-Key v3 - Riocreuxia
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Interactive keys to the identification of seed plants of southern Africa using keys based on plant morphology.

Apocynaceae - Asclepiadoideae - Ceropegieae - Riocreuxia Decne.

Description :

  • Perennials, herbaceous or becoming somewhat woody, twining or with several suberect branches from rootstock with long fleshy roots
  • Leaves mostly cordate at base
  • Flowers in laxly branched cymes or in fascicles at 2 or 3 nodes of flowering axis
  • Sepals usually with scales within base
  • Corolla with ± inflated tube; lobes ± as long as tube, usually connate at tips
  • Corona (1)2- or 3-seriate, arising from and ± as long as staminal column; outer corona a shallowly 5-lobed, basin-shaped structure or a 5-lobed collar, with lobes shortly or deeply divided; inner corona lobes linear or subulate or shortly linear-oblong, incurved over anthers, rarely obsolete
  • Anthers 2-locular, tipped with a short, fleshy appendage or apiculus
  • Pollinia subglobose or ellipsoid; caudicles short
  • Follicles terete or fusiform, acuminate, ± beaded, smooth
  • Seeds linear or oblong, convex on one side, flat on other, winged, with tuft of hairs at apex

Nomenclature:

  • Riocreuxia Decne.
    • Decaisne: 640 (1844)
    • Brown: 799 (1908)
    • Dyer: 83 (1980)
    • Dyer: 227 (1983)
  • Ceropegia in sense of Huber
    • Huber: 167 (1957) in part

Distribution & Notes:

  • Global : Species ± 10, Africa, 1 in India
  • Southern Africa : Species 7, widespread

References:

  • BROWN, N.E. 1908. Asclepiadeae . Flora capensis 4,1
  • DECAISNE, J. 1844. Asclepiadeae . In A.P. de Candolle, Prodromus 8. Treuttel & Würtz, Paris
  • DYER, R.A. 1980. Asclepiadaceae . Brachystelma , Ceropegia , Riocreuxia . Flora of southern Africa 27,4
  • DYER, R.A. 1983. Ceropegia, Brachystelma and Riocreuxia in southern Africa . A.A. Balkema, Rotterdam
  • HUBER, H. 1957. Revision der Gattung Ceropegia . Memorias de Sociedade Broteriana 12