e-Key <span id="jodit_selection_marker_1707300122531_907920858448586" data-jodit_selection_marker="start" style="line-height: 0; display: none;"></span>v3 - Arcto<span id="jodit_selection_marker_1707300122531_9926590356477516" data-jodit_selection_marker="end" style="line-height: 0; display: none;"></span>theca
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Interactive keys to the identification of seed plants of southern Africa using keys based on plant morphology.

Asteraceae - Arctoteae - Arctotheca Wendl.

Description:

  • Perennial herbs, rosulate or stems creeping or decumbent
  • Leaves alternate, petiolate, lyrate-pinnatifid, rarely undivided, whitish woolly beneath
  • Capitula radiate, many-flowered, solitary, peduncled, terminal or axillary
  • Involucre campanulate; bracts in many rows, imbricate, margins scarious
  • Receptacle flat, honeycombed
  • Ray florets neuter; corolla yellow, lamina strap-shaped, ± obovate-oblong, 3-toothed; tube flattened; staminodes sometimes present
  • Disc florets bisexual; corolla yellow; tube funnel-shaped, with 5 lanceolate lobes sometimes with process at back of apex; ovary ± obovoid or cylindric
  • Anthers linear, sagittate at base, with ovate appendage
  • Style terete, thickened above, sometimes intruse or with collar at base of cylindric portion, 2-fid
  • Cypselas obovoid, thinly ribbed, densely to laxly villous or occasionally glabrous
  • Pappus of small hyaline, ciliate scales, or crown of membranous scales, or 0
  • x = 9

Nomenclature:

  • Arctotheca Wendl.
    • Wendland: 41 (1798)
    • Beauverd: 51 (1915)
    • Lewin: 48 (1922)
    • Phillips: 844 (1951)
    • Hilliard: 541 (1977)
    • Pope: 235 (1992)
    • Bremer: 258 (1994)
  • Cryptostemma R.Br.
    • Brown: 141 (1813).
  • Microstephium Less.
    • Lessing: 92 (1831)

Distribution & Notes:

  • Global: Species 4, Mozambique and southern Africa
  • Southern Africa: Known from the North-West, Free State, KwaZulu-Natal, Northern, Western and Eastern Cape

References:

  • BEAUVERD, G. 1915. Conspectus generum specierumque Arctotidinearum. Bulletin de la Société Botanique de Genève 7
  • BREMER, K. 1994. Asteraceae, cladistics & classification. Timber Press, Portland, Oregon
  • BROWN, R. 1813. In W.T. Aiton, Hortus kewensis, edn 2. Vol. 5. Longman et al., London
  • HILLIARD, O.M. 1977. Compositae in Natal. University of Natal Press, Pietermaritzburg
  • LESSING, C.F. 1831. Synanthereae Rich. Linnaea 6
  • LEWIN, K. 1922. Systematische Gliederung und geographische Verbreitung der Arctotideae-Arctotidinae. Feddes Repertorium, Beiheft 11
  • PHILLIPS, E.P. 1951. The genera of South African flowering plants, edn 2. Memoirs of the Botanical Survey of South Africa No. 25
  • POPE, G.V. 1992. 97. Compositae. Flora zambesiaca 6,1
  • WENDLAND, J.C. 1798. Botanische Beobachtungen. Hahn, Hannover