e-Key <span id="jodit_selection_marker_1710146435778_8853545114857271" data-jodit_selection_marker="start" style="line-height: 0; display: none;"></span>v3 - Ga<span id="jodit_selection_marker_1710146435778_23967209415974655" data-jodit_selection_marker="end" style="line-height: 0; display: none;"></span>zania
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Interactive keys to the identification of seed plants of southern Africa using keys based on plant morphology.

Asteraceae - Arctoteae - Gazania Gaertn.

Description:

  • Perennial or rarely annual herbs, usually tufted from base, with milky latex
  • Leaves alternate sometimes rosulate, rarely with distinct petiole, entire to pinnately lobed, usually white-woolly on lower surface
  • Capitula radiate, few- to many-flowered, solitary, pedunculate
  • Involucre urceolate or campanulate; bracts in many rows, connate below to form cup and intrusive at base
  • Receptacle somewhat convex or conical, epaleate
  • Ray florets in 1 row, neuter; corolla yellow, golden or reddish, often with greenish or blackish spot at base, strap-shaped, tube flatttened, with ± oblong-elliptic, 3- or 4-toothed lamina, 2-3-times longer than tube; staminodes sometimes present
  • Disc florets bisexual, fertile or inner sterile; corolla concolorous with ray florets, tubular, widened above, deeply 5-lobed
  • Anthers with bases sagittate, shortly mucronate-acuminate
  • Style terete, thickened above, with ± linear-lanceolate branches; styles of inner, sterile florets usually undivided
  • Cypselas obovoid-obconical, with rows of swollen cells, sericeous
  • Pappus of many, delicate, slender scales, sometimes difficult to distinguish from cypsela hairs
  • x = 5, 6, 7 (polyploidy)

Nomenclature:

  • Gazania Gaertn.
    • Gaertner: 451 (1791)
    • Harvey: 471 (1865)
    • Oliver & Hiern: 427 (1877)
    • Phillips: 845 (1951)
    • Roessler: 365 (1959)
    • Hilliard: 543 (1977)
    • Bremer: 261 (1994)

Distribution & Notes:

  • Global: Species 17, Africa; mainly in southern Africa with Gazania krebsiana Less. subsp. serrulata (DC.) Roessler extending to Angola and Tanzania, and G. rigens (L.) Gaertn. var. uniflora (L.f.) Roessler also occurring in Mozambique
  • Southern Africa: Namibia and South Africa

References:

  • BREMER, K. 1994. Asteraceae, cladistics & classification. Timber Press, Portland, Oregon
  • GAERTNER, J. 1791. De fructibus et seminibus plantarum 2. Academia Carolina, Stuttgart
  • HARVEY, W.H. 1865. Compositae. Flora capensis 3
  • HILLIARD, O.M. 1977. Compositae in Natal. University of Natal Press, Pietermaritzburg
  • OLIVER, D & HIERN, W.P. 1877. Compositae. Flora of tropical Africa 3
  • PHILLIPS, E.P. 1951. The genera of South African flowering plants, edn 2. Memoirs of the Botanical Survey of South Africa No. 25
  • ROESSLER, H. 1959. Revision der Arctotideae - Gorteriinae (Compositae). Mitteilungen der Botanischen Staatssamlung München 3