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

Apocynaceae - Asclepiadoideae - Asclepiadeae - Periglossum Decne.

Description :

  • Perennial herbs, with tuberous rootstock, producing single, erect stems
  • Leaves sessile, slender
  • Flowers few to many, in 2-4 globose umbels, arranged racemosely along upper part of stem
  • Sepals often with scales within base
  • Corolla 5-lobed nearly to base
  • Corona shortly connate at base, 5-lobed, sometimes almost as long as corolla lobes; lobes erect, spatulate-oblong or sagittate, or oblong-linear, with a transverse ridge or flap and often 2 keels on inner face, sometimes reflexed at apex, sometimes with process at base
  • Staminal column arising from base of corolla
  • Anthers 2-locular, with terminal, membranous appendages which are inflexed on style head
  • Pollinia pendulous, curved, sausage-shaped, attached to corpuscle by doubly curved caudicles twice as long as pollinia
  • Follicles narrowly fusiform, tapering to a beak
  • Seeds concave on one side, convex on other, with short protuberances and a pleated rim round concave surface

Nomenclature:

  • Periglossum Decne.
    • Decaisne: 520 (1844)
    • Brown: 581 (1907)

Distribution & Notes:

  • Southern Africa : Species 4, all in southern Africa, all countries and provinces

References:

  • BROWN, N.E. 1907. Asclepiadeae . Flora capensis 4,1
  • DECAISNE, J. 1844. Asclepiadeae . In A.P. de Candolle, Prodromus 8. Treuttel & Würtz, Paris