e-Key v3 - Marlothistella
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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 - Marlothistella Schwantes

Description :

  • Low succulent perennials, ± stemless or with short branches ± hidden by leaf bases, with tufts of long leaves arising from a large caudex
  • Leaves decussate, long, awl-shaped, smooth, dotted, easily desiccating
  • Flowers large, showy, single, sessile, with two small bracteoles strongly keeled on back
  • Sepals 5, of nearly equal length, inner ones bordered with a broad membrane, outer ones not so, all segments becoming ± dry
  • Petals lanceolate, purple with a line of darker purple running down the centre; opening in morning, closing at night
  • Stamens with thick, round, basally long-papillate filaments; staminodes basally shortly papillate
  • Nectary a very high, deeply crenate, dark green ring
  • Ovary with 5 (rarely 6) very high, grooved protuberances; placentas parietal; stigmas 5, greenish yellow, broadly awl-shaped, externally smooth, internally long-haired
  • Fruit a 5-locular capsule; covering membranes stiff, translucent; expanding keels widely divergent, reddish; closing bodies very large, whitish; valve wings 0
  • Seeds large, round, papillately sculptured
  • Flowering winter
  • Distinguishing characters :
    • Tufted perennials with tuberous roots
    • Flowers solitary, large, with purple, striped petals
    • Fruit 5-locular with large, white closing bodies

Nomenclature:

  • Marlothistella Schwantes
    • Schwantes: 599 (1928)
    • Hammer: 82 (1995)
    • Smith et al.: 222 (1998)
  • Ruschia Schwantes in part

Distribution & Notes:

  • Southern Africa : Species 1: Marlothistella stenophylla (L.Bolus) S.A.Hammer, restricted to the Little Karoo in the Western Cape, in the districts of Calitzdorp, De Rust, Joubertina, Prince Albert, Uniondale and Willowmore

References:

  • HAMMER, S.A. 1995. Marlothistella Schwantes: A rising star. Bradleya 13
  • SCHWANTES, G. 1928. Aus unseren Pflanzenschätzen. Mesembriaceen-Studien. Die Gartenwelt 32
  • 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