e-Key v<span id="jodit_selection_marker_1710142655150_937794970766139" data-jodit_selection_marker="start" style="line-height: 0; display: none;"></span>3 - *Gamoc<span id="jodit_selection_marker_1710142655150_9877466790954155" data-jodit_selection_marker="end" style="line-height: 0; display: none;"></span>haeta
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Interactive keys to the identification of seed plants of southern Africa using keys based on plant morphology.

Asteraceae - Gnaphalieae - *Gamochaeta Wedd.

Description:

  • Annual or perennial herbs
  • Leaves alternate, sessile, tomentose (hair type B), eglandular, margin flat, entire
  • Capitula disciform, small, inconspicuous, in head-like clusters or in ± elongated spikes
  • Involucral bracts papery, brownish, transparent; stereome undivided
  • Receptacle flat, epaleate
  • Female florets purple, filiform, pistillate, outnumbering disc florets
  • Disc florets bisexual; corolla purple, corolla lobes erect
  • Anthers ecalcarate, caudate with short tails; apical appendage flat, as wide as thecae; endothecial tissue polarised
  • Style bifid; style branches truncate with obtuse sweeping hairs apically; stigmatic surface separated
  • Cypselas small, oblong, with globose, myxogenic twin hairs; epidermis smooth
  • Pappus of barbellate, capillary bristles in 1 row, deciduous as unit, basally connate; apical cells not clavate
  • x = 10 (1 report, polyploidy)

Nomenclature:

  • *Gamochaeta Wedd.
    • Weddell: 151 (1856)
    • Anderberg: 155 (1991)
    • Anderberg: 357 (1994)
  • Gnaphalium L., in part, excl. type
    • Hilliard: 17 (1983)

Distribution & Notes:

  • Global: Species 52, mainly South America, but also in other parts of the world
  • Southern Africa: Species 5, naturalised, widespread but absent from Namibia, Botswana and Northern Cape

References:

  • ANDERBERG, A.A. 1991. Taxonomy and phylogeny of the tribe Gnaphalieae (Asteraceae). Opera Botanica 104
  • ANDERBERG, A.A. 1994. Tribes Inuleae, Plucheeae, Gnaphalieae. In K. Bremer, Asteraceae, cladistics and classification. Timber Press, Portland, Oregon
  • HILLIARD, O.M. 1983. Asteraceae (Compositae), Tribe Inuleae subtribe Gnaphaliinae (first part). Flora of southern Africa 33, 7, 2
  • WEDDELL, H.A. 1856. Chloris Andina 1. Bertrand, Paris