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Interactive keys to the identification of seed plants of southern Africa using keys based on plant morphology.

Asteraceae - Cardueae - *Carthamus L.

Description:

  • Branched, annual herbs with glandular indumentum
  • Leaves alternate, pinnatifid to pinnatisect with spiny margins
  • Capitula discoid, solitary
  • Involucre with bracts in many rows, imbricate, spiny, outer leaf-like, inner sometimes with apical appendages
  • Florets all bisexual; corolla yellow
  • Anthers with filaments usually densely bearded
  • Cypselas obovoid to broadly obconical, 4-angled, smooth, glabrous, with apical rim; cypselas in outer florets generally rugose
  • Pappus usually double, outer row of subulate, serrulate-ciliate, persistent scales, inner row with scales shorter and basally connate
  • x = 6, 10 (8, 11) (aneuploids, high polyploidy, B-chromosomes)

Nomenclature:

  • *Carthamus L.
    • Linnaeus: 830 (1753)
    • Oliver & Hiern: 439 (1877)
    • Hanelt: 302 (1976)
    • Bremer: 151 (1994)

Distribution & Notes:

  • Global: Species 14, Mediterranean region, Asia
  • Southern Africa: Species 1: *Carthamus lanatus L., occurs sporadically in the Northern and Western Cape

References:

  • BREMER, K. 1994. Asteraceae, cladistics & classification. Timber Press, Portland, Oregon
  • HANELT, P. 1976. Carthamus. Flora europaea 4
  • LINNAEUS, C. VON. 1753. Species plantarum. Laurentius Salvius, Stockholm
  • OLIVER, D & HIERN, W.P. 1877. Compositae. Flora of tropical Africa 3

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