e-Key v3 - Monilaria
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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 - Monilaria (Schwantes) Schwantes

Description :

  • Freely branched, compact shrublets up to 200 mm high, with a short and a long leaf pair per season; branches constricted at nodes into short, often bead- or button-like segments covered by parchment-like remnants of old leaf pairs
  • Leaves opposite, glistening, soft, papillate, of 2 kinds: first pair small or rudimentary, forming a fleshy, almost completely closed sheath through which second pair emerges; second pair consisting of 2 long, cylindrical leaves somewhat flattened on upper side and fused only at base; when long leaves eventually shrivel this base develops into a persistent sheath covering bead-like stem segments and protecting next leaf pair
  • Flowers terminal, solitary, on elongated pedicel, papillate, ± 40 mm in diameter; bibracteate; opening midday, closing late afternoon; highly scented
  • Sepals 5, unequal, papulose or papillate
  • Petals in 3 or 4 series, white, yellow or pale violet-red
  • Stamens with or without hairs
  • Nectary a crenulate ring
  • Ovary shallow; flat on top with 5(-7) prominent sutural ridges; placentas basal or parietal; stigmas 5(-7), stout, ovate to subulate
  • Fruit a 5(-7)-locular capsule, of Mitrophyllum type, with prominent sutural ridges; valves widely spreading or reflexed; expanding keels ± widely diverging, broad at base, with inner ridges raised and with narrow, marginal wings; locules shallow, with or without covering membranes; closing devices 0
  • Seeds many in each locule, acutely ovoid, smooth
  • x = 9 (polyploidy)
  • Flowering autumn to winter
  • Distinguishing characters :
    • Small shrublets with succulent constricted stems and persistent leaf bases, resembling a string of large beads

Nomenclature:

  • Monilaria (Schwantes) Schwantes
    • Schwantes: 69 (1929)
    • Herre: 216 (1971)
    • Ihlenfeldt & Jörgensen: 49 (1973)
    • Smith et al.: 242 (1998)

Distribution & Notes:

  • Southern Africa : Species 5, Namaqualand, in the Western and Northern Cape

References:

  • HERRE, H. 1971. The genera of the Mesembryanthemaceae . Tafelberg, Cape Town
  • IHLENFELDT, H.-D. & JÖRGENSEN, S. 1973. Morphologie und Taxonomie der Gattung Monilaria (Schwantes) Schwantes s. str. ( Mesembryanthemaceae ) (Monographie der Mitrophyllinae Schwantes I). Mitteilungen aus dem Staatsinstitut für Allgemeine Botanik. Hamburg 14
  • SCHWANTES, G. 1929. Aus unseren Pflanzenschätzen. Mesembriaceen-Studien. Die Gartenwelt 33
  • 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