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

Asteraceae - Astereae - Psiadia Jacq.

Description :

  • Shrubs, ± viscid at extremities
  • Leaves alternate, petiolate, linear to lanceolate, entire, serrulate or undulate
  • Capitula disciform or shortly radiate, in terminal corymbose cymes, pedunculate
  • Involucre subglobose or campanulate; bracts in 3-5 rows, imbricate
  • Receptacle flat, epaleate
  • Ray florets female, fertile, in several rows, with strap-shaped lamina, 2- or 3-toothed, pale yellow
  • Style branches slender
  • Disc florets male, yellow; corolla funnel-shaped, shortly 5-lobed
  • Anthers obtuse at base, but very shortly 2-dentate
  • Cypselas narrowly turbinate, pubescent
  • Pappus of many barbellate bristles united at base, in 1 row
  • x = 9 (1 report)

Nomenclature:

  • Psiadia Jacq.
    • Jacquin: 13, t. 152 (1797)
    • Cufodontis: 1084 (1966)
    • Merxmüller: 150 (1967)
    • Wild: 23 (1975)
    • Bremer: 430 (1994)

Distribution & Notes:

  • Global : Species ± 60, Africa, Madagascar and Asia
  • Southern Africa : Species 1: Psiadia punctulata (DC.) Oliv. & Hiern ex Vatke, Namibia, Botswana, Northern Province, North-West, Gauteng, Mpumalanga and Northern Cape

References:

  • BREMER, K. 1994. Asteraceae , cladistics & classification . Timber Press, Portland, Oregon
  • CUFODONTIS, G. 1966. Enumeratio plantarum Aethiopiae Spermatophyta. Bulletin du Jardin Botanique de l'État Bruxelles 36, Supplement
  • JACQUIN, N.J.B. VON. 1797. Plantarum rariorum horti caesarei schoenbrunnensis 2. Wappler, Vienna
  • MERXMÜLLER, H. 1967. Asteraceae . Prodromus einer Flora von Südwestafrika 139
  • WILD, H. 1975. The Compositae of the Flora zambesiaca area, 4. Astereae . Kirkia 10