e-Key v<span id="jodit_selection_marker_1709632080464_300401953269515" data-jodit_selection_marker="start" style="line-height: 0; display: none;"></span>3 - *Fla<span id="jodit_selection_marker_1709632080464_6498506513287565" data-jodit_selection_marker="end" style="line-height: 0; display: none;"></span>veria
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Interactive keys to the identification of seed plants of southern Africa using keys based on plant morphology.

Asteraceae - Helenieae - *Flaveria Juss.

Description:

  • Annual, erect herbs, sometimes becoming woody at base, glabrous or minutely puberulous
  • Branches divaricate, leafy
  • Leaves opposite, sessile, simple, lanceolate to elliptic, margin entire or toothed
  • Capitula discoid, few-flowered, often sessile, corymbose or in axillary glomerules
  • Involucre ± cylindric; bracts 2-4 in 1 row, sometimes subtended by 1 or 2 smaller ones
  • Receptacle epaleate
  • Disc florets bisexual, corolla yellow, tubular below, turbinate-campanulate above, 5-toothed
  • Anthers with bases obtuse; apical appendage oblong
  • Style branches oblong, truncate, minutely penicillate
  • Cypselas elliptic, narrowing slightly to base, 10-ribbed
  • Pappus 0
  • x = 9 (polyploidy)

Nomenclature:

  • *Flaveria Juss.
    • Jussieu: 186 (1789)
    • Phillips: 819 (1951)
    • Hilliard: 324 (1977)
    • Karis & Ryding: 542 (1994)

Distribution & Notes:

  • Global: Species 21, Central and South America, Mexico, Australia
  • Southern Africa: Species 1: *Flaveria bidentis (L.) Kuntze, introduced from America and now a widespread weed in South Africa and Swaziland

References:

  • HILLIARD, O.M. 1977. Compositae in Natal. University of Natal Press, Pietermaritzburg
  • JUSSIEU, A.L. DE. 1789. Genera plantarum. Herissant & Barrois, Paris
  • KARIS, P.O. & RYDING, O. 1994. Tribes Helenieae and Heliantheae. In K. Bremer, Asteraceae, cladistics and classification. Timber Press, Portland, Oregon
  • PHILLIPS, E.P. 1951. The genera of South African flowering plants, edn 2. Memoirs of the Botanical Survey of South Africa No. 25

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