e-Key <span id="jodit_selection_marker_1707292096521_4554929328181594" data-jodit_selection_marker="start" style="line-height: 0; display: none;"></span>v3 - Cad<span id="jodit_selection_marker_1707292096521_7013049887307008" data-jodit_selection_marker="end" style="line-height: 0; display: none;"></span>iscus
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Interactive keys to the identification of seed plants of southern Africa using keys based on plant morphology.

Asteraceae - Senecioneae - Cadiscus E.Mey. ex DC.

Description:

  • Fleshy, aquatic herbs
  • Leaves alternate, linear, amplexicaul, margin entire, glabrous
  • Capitula radiate; with many florets, solitary, pedunculate, opposite the leaves
  • Involucre campanulate, of 8-10 scales connate into cup in lower half
  • Receptacle slightly convex, epaleate
  • Ray florets female; corolla white; tube short, slender, lamina ovate, entire or 3-toothed, longer than tube
  • Style linear; branches linear, obtuse
  • Cypselas terete, ribbed, hirsute on ribs
  • Pappus of setose, somewhat accrescent awns
  • Disc florets functionally male; corolla yellow, tube slender, campanulate above, lobes 5
  • Anthers obtuse at base, apiculate
  • Style undivided
  • x = 10

Nomenclature:

  • Cadiscus E.Mey. ex DC.
    • Candolle: 254 (1838)
    • Harvey: 134 (1865)
    • Phillips: 819 (1951)
    • Bremer: 499 (1994)

Distribution & Notes:

  • Southern Africa: Species 1: Cadiscus aquaticus E.Mey. ex DC., endemic in the Western Cape

References:

  • BREMER, K. 1994. Asteraceae, cladistics & classification. Timber Press, Portland, Oregon
  • CANDOLLE, A.P. DE. 1838. Compositae. Prodromus 7,1. Treuttel & Würtz, Paris
  • HARVEY, W.H. 1865. Compositae. Flora capensis 3
  • PHILLIPS, E.P. 1951. The genera of South African flowering plants, edn 2. Memoirs of the Botanical Survey of South Africa No. 25

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