e-Key v3 - Polymita
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Interactive keys to the identification of seed plants of southern Africa using keys based on plant morphology.

Mesembryanthemaceae - Ruschioideae - Ruschia Group - Polymita N.E.Br.

Description :

  • Glabrous shrubs up to 400 mm high
  • Leaves opposite, united for ± half their length into a sheath with longitudinal lines, apical portion spreading, acute or mucronate, triangular in cross section, with margins and keel somewhat horny, often serrate; stomatal apparatus sunken, hidden under a dome of connate peristomatal papillae
  • Flowers solitary or in cymes, pedicellate, ± 20 mm in diameter; bracts enclosing lower part of flower
  • Sepals 5, subequal
  • Petals often in 5 groups, filiform-linear, white
  • Stamens incurved, concealed by longer and many more white staminodes in 3 or 4 series
  • Nectary a crenulate ring
  • Ovary with placentas parietal; stigmas (8-) 10(-18), subulate
  • Fruit a (8-)10(-18)-locular capsule, with top elevated and white, and base ± funnel-shaped; close to Ruschia type, but with valve wings and rather shallow locules; expanding keels abruptly diverging towards apex, with broad, terminal wings; covering membranes straight, without a rim at top; closing bodies large and white ( P. albiflora ) or smaller and dark ( P. steenbokensis )
  • Seeds smooth
  • Flowering in summer
  • Distinguishing characters :
    • Shrubby perennials with leaves fused at their bases, stem-sheathing, diverging at tips
    • Flowers white
    • Fruit 10-18-locular

Nomenclature:

  • Polymita N.E.Br.
    • Brown: 72 (1930)
    • Herre: 254 (1971)
    • Hartmann: 29 (1996)
    • Smith et al.: 352 (1998)

Distribution & Notes:

  • Southern Africa : Species 2, northern Namaqualand in the Northern Cape

References:

  • BROWN, N.E. 1930. Mesembryanthemum and some new genera separated from it. Gardeners' Chronicle 87
  • HARTMANN, H.E.K. 1996. Miscellaneous taxonomic notes on Aizoaceae . Bradleya 14
  • HERRE, H. 1971. The genera of the Mesembryanthemaceae . Tafelberg, Cape Town
  • 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