e-Key v3 - Stoeberia
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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 - Stoeberia Dinter & Schwantes

Description :

  • Sturdy shrubs, or even trees (Von Breitenbach 1990: 30) up to 3 m tall and 3.5 m wide, usually with a solitary main stem; branches succulent at first, soon becoming woody
  • Leaves decussate, slightly connate at base, boat-shaped or somewhat clavate, with somewhat flattened upper surface and keeled towards apex, mucronate; epidermal cells convex, stomata slightly sunken
  • Flowers many (up to 50), in dense, rounded, compound dichasia, pedicellate, bibracteate; bracts club-shaped
  • Sepals 5 or 6, triangular
  • Petals ± 1-seriate, short, white to light-pink
  • Stamens and staminodes papillate at base, in a dense cone
  • Nectary a crenulate ring
  • Ovary top-shaped; placentas parietal; stigmas 5(6), short, slightly plumose
  • Fruit a 5(6)-locular capsule, nearest Ruschia type, top-shaped, upper part domed; valve margins slightly raised in most species; locules deep and wide; valves opening once; valve wings broad, sclerotinised; closing bodies absent or present
  • Seeds flat to pear-shaped and shortly winged; testa cells vaulted, rough; dispersed by wind (anemochoric)
  • Flowering winter to spring
  • Distinguishing characters :
    • Shrublets or large bushes
    • Fruit with hard valve wings, and recurved valve rims, not closing completely once they have opened

Nomenclature:

  • Stoeberia Dinter & Schwantes
    • Schwantes: 14, 17 (1927)
    • Friedrich: 554 (1960)
    • Friedrich: 128 (1970)
    • Herre: 294 (1971)
    • Van Jaarsveld: 68 (1994)
    • Hartmann: 29 (1996)
    • Smith et al.: 366 (1998)

Distribution & Notes:

  • Southern Africa : Species 5, Namaqualand (Northern Cape) and Namibia

References:

  • FRIEDRICH, H.C. 1960. Mesembryanthemenstudien I. Beitrag zur Kenntnis der Gattungen Stoeberia Dtr. et Schw. und Ruschianthemum Friedr. gen. nov. Mitteilungen aus der Botanischen Staatssammlung. München 3
  • FRIEDRICH, H.C. 1970. Aizoaceae . Prodromus einer Flora von Südwestafrika 27
  • HARTMANN, H.E.K. 1996. Miscellaneous taxonomic notes on Aizoaceae . Bradleya 14
  • HERRE, H. 1971. The genera of the Mesembryanthemaceae . Tafelberg, Cape Town
  • SCHWANTES, G. 1927. Zur Systematik der Mesembrianthemen. Zeitschrift für Sukkulentenkunde 3
  • 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
  • VAN JAARSVELD, E.J. 1994. A synopsis of the genus Stoeberia . Aloe 31