e-Key <span id="jodit_selection_marker_1710927410935_440629804105251" data-jodit_selection_marker="start" style="line-height: 0; display: none;"></span>v3 - Meyerop<span id="jodit_selection_marker_1710927410935_9911441825444549" data-jodit_selection_marker="end" style="line-height: 0; display: none;"></span>hytum
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Interactive keys to the identification of seed plants of southern Africa using keys based on plant morphology.

Mesembryanthemaceae - Ruschioideae - Mitrophyllum Group - Meyerophytum Schwantes

Description:

  • Low, compact shrublets with prostrate to ascending branches, internodes well visible, old dry leaf sheaths persistent
  • Leaves opposite, of 2 kinds: first leaf pair of season globose, grey-green; second united for a third to half length, deeper green, with conspicuous bladder cell idioblasts, base of latter developing into a papery parchment-like sheath enclosing first (assimilating) leaf pair of next season during dry period
  • Flowers solitary, terminal, long-pedicelled, thus well exserted above a long leaf pair, up to 40 mm in diameter; opening at midday, closing in afternoon
  • Sepals 5, subequal
  • Petals 3- or 4-seriate, linear, violet-purple or white
  • Stamens erect, inner ones papillate at base; staminodes 0
  • Nectary a crenulate ring
  • Ovary flat to concave on top; placentas parietal; stigmas 5, broad, plumose
  • Fruit a 5-locular capsule, of Mitrophyllum type but with deeply concave covering membranes with a prominent distal bulge touching the protuberance reaching from base of expanding sheet into locule; closing bodies 0; valve wings ample; expanding keels flat
  • Seeds ovoid or pear-shaped, smooth
  • x = 9
  • Flowering after good rains in spring
  • Distinguishing characters:
    • Compact shrublets with weak, repeatedly branching stems
    • Resting leaf bodies conspicuous

Nomenclature:

  • Meyerophytum Schwantes
    • Schwantes: 436 (1927)
    • Bolus: 345-346 (1958)
    • Herre: 208 (1971)
    • Smith et al.: 238 (1998)
  • Depacarpus N.E.Br.
    • Brown: 71 (1930)

Distribution & Notes:

  • Southern Africa: Species 1: Meyerophytum meyeri (Schwantes) Schwantes, restricted to the Northern Cape, from the Richtersveld to S Namaqualand

References:

  • BOLUS, H.M.L. 1958. Meyerophytum Schwant. Notes on Mesembryanthemum and allied genera. 3. University of Cape Town, Cape Town
  • BROWN, N.E. 1930. Mesembryanthemum and some new genera separated from it. Gardeners' Chronicle 87
  • HERRE, H. 1971. The genera of the Mesembryanthemaceae. Tafelberg, Cape Town
  • SCHWANTES, G. 1927. Einige neue Mesembrianthemaceen. Möllers Deutsche Gärtner-Zeitung 42
  • 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