e-Key <span id="jodit_selection_marker_1710150773487_8895441694513337" data-jodit_selection_marker="start" style="line-height: 0; display: none;"></span>v3 - Gor<span id="jodit_selection_marker_1710150773487_7881977424660815" data-jodit_selection_marker="end" style="line-height: 0; display: none;"></span>teria
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Interactive keys to the identification of seed plants of southern Africa using keys based on plant morphology.

Asteraceae - Arctoteae - Gorteria L.

Description:

  • Annual herbs, sometimes with wiry branches from base
  • Leaves alternate, sometimes radical, sessile, linear to lanceolate, entire or lobed, woolly on lower surface
  • Capitula radiate, several-flowered, solitary, terminal or axillary, subsessile
  • Involucre ovoid; bracts connate into cup towards base, pungent, ciliate, enclosing fruit after anthesis
  • Receptacle basin-shaped, nude, honeycombed, with margins of pits produced
  • Ray florets neuter, arising on side of receptacle; corolla yellow or orange, sometimes with dark basal spot and dark dorsal stripe, with tube absent; lamina ± elliptic above and narrowed into a long claw, 2- or 3-toothed
  • Disc florets bisexual, fertile or central ones sterile; corolla yellow or orange; tube slightly widened above, with 5 linear or lanceolate lobes
  • Anthers shortly sagittate at base; with ovate, apical appendage
  • Style linear, subglobose at base with lanceolate or linear-lanceolate branches; those of innermost florets undivided
  • Cypselas obovoid, apically sericeous
  • Pappus of few narrow setae or ring of minute, hyaline scales or long-ciliate cup, or crown
  • Seeds germinating within capitula

Nomenclature:

  • Gorteria L.
    • Linnaeus: 1229 (1759)
    • Harvey: 469 (1865)
    • Phillips: 844 (1951)
    • Roessler: 319 (1959)
    • Bremer: 262 (1994)

Distribution & Notes:

  • Southern Africa: Species 3, endemic, occurring S Namibia, Northern Cape (Richtersveld, Namaqualand) and ± along the west and southern coastal region of the Western Cape to Humansdorp in the Eastern Cape

References:

  • BREMER, K. 1994. Asteraceae, cladistics & classification. Timber Press, Portland, Oregon
  • HARVEY, W.H. 1865. Compositae. Flora capensis 3
  • LINNAEUS, C. VON. 1759. Systema naturae 2 (edn 10). Theodor Haak, Leiden
  • 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