e-Key <span id="jodit_selection_marker_1706009433033_7908490338148457" data-jodit_selection_marker="start" style="line-height: 0; display: none;"></span>v3 - Amphi<span id="jodit_selection_marker_1706009433033_42538612068765413" data-jodit_selection_marker="end" style="line-height: 0; display: none;"></span>bolia
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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 - Amphibolia L.Bolus

Description:

  • Sprawling shrubs, up to 400 mm high, 700 mm in diameter; stems light-coloured
  • Leaves opposite, connate at bases, ascending-spreading, club-shaped with rounded tips, light green to greyish, surfaces smooth, waxy
  • Flowers solitary or in threes, shortly pedicelled with pink bracts
  • Sepals 5, nearly equal, sometimes with narrow, membranous margins
  • Petals 2-seriate, obtuse or subacute, light violet and creamy white, with distinct colour pattern: a dark area at the tip with a thin dark line running down to base, where it broadens and darkens, dark bases of all petals forming a clearly demarcated ring surrounded by a creamy whitish region, resulting in a characteristic star-like pattern
  • Stamens conically arranged; filaments often papillate; staminodes papillate
  • Nectary a crenulate ring
  • Ovary slightly conical above; placentas parietal; stigmas 5, subulate, purple
  • Fruit a capsule, whitish, often filled with spongy tissue, 5-locular with locules deep and narrow, obconical, once open does not close again; valves with rectangular wings (as in Lampranthus type); expanding keels diverging, touching at their bases; covering membranes with closing rodlets or thick closing ledges on distal undersurfaces; closing bodies small, white, endocarpal, sometimes deep in the locule
  • Seeds subglobose or slightly narrowed to one end, brown, glossy
  • Flowering in summer
  • Distinguishing characters:
    • White-stemmed shrubs
    • Fruit with valve wings, without covering membranes
    • Flowers with star-like colour pattern

Nomenclature:

  • Amphibolia L.Bolus
    • Bolus: 169 (1965)
    • Herre: 70 (1971)
    • Toelken & Jessop: 64 (1976)
    • Hartmann & Dehn: 179 (1989)
    • Hartmann: 34 (1996)
    • Hartmann: 44 (1998)
    • Smith et al.: 316 (1998)
  • Eberlanzia Schwantes
    • Schwantes: 189 (1926), in part
    • Hartmann & Stüber: 63 (1993)

Distribution & Notes:

  • Southern Africa: Species 5, coastal plains of Namibia between Lüderitz and Oranjemund and southwards to Namaqualand in the Northern Cape, to the Cape Peninsula in the Western Cape

References:

  • BOLUS, H.M.L. 1965. Notes on Mesembryanthemum and allied genera. Journal of South African Botany 31
  • 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. & DEHN, M. 1989. A re-examination of the genus Amphibolia (Mesembryanthemaceae). Bothalia 19
  • 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
  • TOELKEN, H.R. & JESSOP, J.P. 1976. Mesembryanthemaceae. Nomenclature of the genus Amphibolia. Bothalia 12