e-Key <span id="jodit_selection_marker_1709285399833_5946560470943227" data-jodit_selection_marker="start" style="line-height: 0; display: none;"></span>v3 - Eberl<span id="jodit_selection_marker_1709285399833_7202300787730522" data-jodit_selection_marker="end" style="line-height: 0; display: none;"></span>anzia
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Interactive keys to the identification of seed plants of southern Africa using keys based on plant morphology.

Mesembryanthemaceae - Ruschioideae - Eberlanzia Group - Eberlanzia Schwantes

Description:

  • Shrubs up to 500 mm high, sometimes thorny, erect to procumbent; internodes whitish
  • Leaves of a pair slightly connate, short and fat with convex sides, mucronate, greyish green to dark green; epidermis with elevations above subhypodermal tannin idioblasts, papillate
  • Flowers relatively small, ± 10-20 mm in diameter, in richly to poorly branched dichasia, with additional lateral inflorescences, sometimes umbellate and crowded, rarely solitary; spines in inflorescences irregularly distributed, derived from pedicels having lost the fruit; with 2 leafy bracts, with or without bracteoles
  • Sepals 5, nearly equal
  • Petals in 1 series or 0, white to violet
  • Stamens and staminodes present, collected in a cone, often papillate
  • Nectary a crenulate ring
  • Ovary raised on top; placentas parietal; stigmas 5, subulate, erect
  • Fruit capsule close to the Ruschia type; 5-locular; bottom bell-shaped, top convex, valve rims high; valves opening completely, valve wings broad and rectangular; closing bodies white; covering membranes complete with distal closing rodlets and low rims
  • Seeds smooth, almost round, amber-coloured
  • x = 9 (1 report)
  • Flowering throughout the year, peaking in winter
  • Distinguishing characters:
    • Flat-growing to erect shrubs
    • Leaves greyish green or reddish or bluish, textured
    • Fruit with valves folding back entirely when expanded

Nomenclature:

  • Eberlanzia Schwantes
    • Schwantes: 189 (1926)
    • Friedrich: 42 (1970)
    • Herre: 144 (1971)
    • Hartmann & Stüber: 1 (1993)
    • Hartmann: 29 (1996)
    • Smith et al.: 350 (1998)
    • Hartmann: 44 (1998)

Distribution & Notes:

  • Southern Africa: Species 8, mainly on sandy flats with limestone pebbles characteristic of the southern Namib Desert, Namibia, also in western Namaqualand, Northern Cape

References:

  • FRIEDRICH, H.C. 1970. Aizoaceae. Prodromus einer Flora von Südwestafrika 27
  • HARTMANN, H.E.K. 1996. Miscellaneous taxonomic notes on Aizoaceae. Bradleya 14
  • HARTMANN, H.E.K. 1998. New combinations in Ruschioideae, based on studies in Ruschia (Aizoaceae). Bradleya 16
  • HARTMANN, H.E.K. & STÜBER, D. 1993. On spiny Mesembryanthema and the genus Eberlanzia (Aizoaceae). Contributions from the Bolus Herbarium 15
  • HERRE, H. 1971. The genera of the Mesembryanthemaceae. Tafelberg, Cape Town
  • SCHWANTES, G. 1926. Zur Systematik der Mesembrianthemen. Zeitschrift für Sukkulentenkunde 2
  • SMITH, G.F., CHESSELET, P., VAN JAARSVELD, E.J., HARTMANN, H., HAMMER, S., VAN WYK, B-.E., BURGOYNE, P., KLAK, C. & KURZWEIL, H. 1998. Mesembs of the world. Briza, Pretoria