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

Asteraceae - Inuleae - *Pentanema Cass.

Description :

  • Annual herbs
  • Leaves alternate, oblong to lanceolate, entire or toothed, often villose
  • Capitula radiate, pedunculate, solitary
  • Involucral bracts in many rows, narrow, imbricate, ± scarious, finely pointed
  • Receptacle epaleate
  • Ray florets female; corolla yellow, strap-shaped, 3-toothed
  • Disc florets bisexual; corolla yellow, tubular, 5-toothed
  • Anthers ecalcarate, caudate, with branched tails; endothecial tissue radial
  • Style with acute sweeping hairs, not reaching furcation
  • Cypselas ellipsoid
  • Pappus of barbellate bristles in 1 row
  • x = 9 (10, 17 - 1 report) (polyploidy)

Nomenclature:

  • *Pentanema Cass.
    • Cassini: 74 (1818)
    • Rechinger: 96 (1980)
    • Anderberg: 100 (1991)
    • Anderberg: 289 (1994)
  • Vicoa Cass.
    • Cassini: 418 (1829)
    • Bentham: 334 (1873)
    • Oliver & Hiern: 361 (1877)

Distribution & Notes:

  • Global : Species ± 18, Asia, India, Afghanistan, Pakistan, Africa
  • Southern Africa : Species 1: * Pentanema indicum (L.) Y.Ling, naturalised, North-West

References:

  • ANDERBERG, A.A. 1991. Taxonomy and phylogeny of the tribe Inuleae ( Asteraceae ). Plant Systematics and Evolution 176
  • ANDERBERG, A.A. 1994. Tribes Inuleae , Plucheeae , Gnaphalieae . In K. Bremer, Asteraceae , cladistics and classification . Timber Press, Portland, Oregon
  • BENTHAM, G. 1873. Compositae . In G. Bentham & J.D. Hooker, Genera Plantarum 2. Lovell Reeve & Co., London
  • CASSINI, A.H.G. DE. 1818. Aperçu des genres ou sous-genres nouveaux formés par M. Henri Cassini dans la famille des Synanthérées. Bulletin des sciences de la Société Philomatique de Paris 10
  • CASSINI, A.H.G. DE. 1829. Tableau des Synanthérées. Annales des sciences naturelles (Paris) 17
  • OLIVER, D & HIERN, W.P. 1877. Compositae . Flora of tropical Africa 3
  • RECHINGER, K.H. 1980. Pentanema . Flora Iranica 145. Compositae IV - Inuleae