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

Apocynaceae - Asclepiadoideae - Asclepiadeae - Sarcostemma R.Br.

Description :

  • Perennial, ± leafless, ± glabrous succulents or subsucculents, trailing or twining, or occasionally shrubby
  • Leaves rudimentary
  • Flowers in lateral or terminal, sessile umbels
  • Sepals narrowly ovate-triangular, with scales within base
  • Corolla deeply lobed; lobes oblong or oblong-elliptic, margins recurved
  • Corona 2-seriate, arising from filament part of staminal column; outer corona annular, cup- or basin-shaped, 5-angled, truncate or shortly lobed; inner corona attached to staminal column almost throughout, of 5 fleshy, compressed or keeled lobes, enclosed at base by outer corona
  • Anthers 2-locular, with membranous, ovate, inflexed or ascending appendages
  • Pollinia very narrowly ovate, pendulous; caudicles shorter than pollinia; corpuscle very narrowly ovate, deep maroon
  • Follicles narrowly fusiform, usually bluntly beaked, often with somewhat membranous surface
  • Seeds compressed, ovate, narrowly winged, smooth
  • x = 11 (9, 10)

Nomenclature:

  • Sarcostemma R.Br.
    • Brown: 50 (1810)
    • Brown: 755 (1908)

Distribution & Notes:

  • Global : Species 10, in arid parts of Old World
  • Southern Africa : Species 2, 1 widespread except in southwestern region of Western Cape

References:

  • BROWN, N.E. 1908. Asclepiadeae . Flora capensis 4,1
  • BROWN, R. 1810. On the Asclepiadeae , a natural order of plants separated from the Apocineae of Jussieu. Memoirs of the Wernerian Natural History Society 1