e-Key v<span id="jodit_selection_marker_1709295904825_5531995172677373" data-jodit_selection_marker="start" style="line-height: 0; display: none;"></span>3 - *Et<span id="jodit_selection_marker_1709295904825_7345535293818355" data-jodit_selection_marker="end" style="line-height: 0; display: none;"></span>hulia
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Interactive keys to the identification of seed plants of southern Africa using keys based on plant morphology.

Asteraceae - Vernonieae - *Ethulia L.f.

Description:

  • Annual or rarely short-lived, perennial herbs
  • Leaves alternate, shortly petiolate, ovate-lanceolate to linear, entire or serrate
  • Capitula discoid; several- to many-flowered, in much-branched corymbs
  • Involucre campanulate or subhemispherical; bracts herbaceous, in 3 to many rows, imbricate, acute or obtuse
  • Receptacle flat, epaleate
  • Corolla mauve or purple; tube cylindric below, shallowly campanulate above; lobes 5, lanceolate, longer than campanulate part of tube
  • Anthers obtuse at base; with short, ovate, membranous apical appendage
  • Style branches filiform, subulate; pollen-sweeping hairs relatively long, exserted
  • Cypselas oblong-obconical, usually strongly 2-6-ribbed, glandular or rarely sparsely pilose between ribs and with thickened apical rim
  • Pappus 0
  • x = 10 (8 - 1 report) (aneuploids, polyploidy)

Nomenclature:

  • *Ethulia L.f.
    • Linnaeus f.: 1 (1762)
    • Harvey: 47 (1865)
    • Oliver & Hiern: 262 (1877)
    • Merxmüller: 63 (1967)
    • Hilliard: 24 (1977)
    • Gilbert & Jeffrey: 167 (1989)
    • Bremer: 220 (1994)
  • Hoehnelia Schweinf.
    • Schweinfurth: 861 (1892)

Distribution & Notes:

  • Global: Species 19, tropical Africa and less commonly in tropical Asia
  • Southern Africa: The widespread weedy species *Ethulia conyzoides L.f., is the only introduced representative, recorded from the Northern Province, Mpumalanga and Gauteng

References:

  • BREMER, K. 1994. Asteraceae, cladistics & classification. Timber Press, Portland, Oregon
  • GILBERT, M.G. & JEFFREY, C. 1989. A revision of Ethulia (Compositae: Vernonieae). Kew Bulletin 43
  • HARVEY, W.H. 1865. Compositae. Flora capensis 3
  • HILLIARD, O.M. 1977. Compositae in Natal. University of Natal Press, Pietermaritzburg
  • LINNAEUS, C. VON, f. 1762. Ethulia. Decas prima plantarum rariorum horti upsaliensis. Laurentius Salvius, Stockholm
  • MERXMÜLLER, H. 1967. Asteraceae. Prodromus einer Flora von Südwestafrika 139
  • OLIVER, D & HIERN, W.P. 1877. Compositae. Flora of tropical Africa 3
  • SCHWEINFURTH, G.A. 1892. In L.R. von Höhnel, Zum Rudolf-See und Stephanie-See. Alfred Hölder, Vienna