e-Key <span id="jodit_selection_marker_1710146195056_2280050456701459" data-jodit_selection_marker="start" style="line-height: 0; display: none;"></span>v3 - Gas<span id="jodit_selection_marker_1710146195056_1381468479174306" data-jodit_selection_marker="end" style="line-height: 0; display: none;"></span>teria
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Interactive keys to the identification of seed plants of southern Africa using keys based on plant morphology.

Asphodelaceae - Alooideae - Gasteria Duval

Description:

  • Acaulescent to shortly stemmed, succulent perennials; decumbent or erect, rarely pendulous; solitary or proliferating from base; 0.15-1 m tall
  • Leaves succulent, distichous in juvenile stage (which may persist), spirally arranged or rosulate, lorate, lanceolate to ensiform or deltoid; erectly spreading to strongly recurved; both surfaces smooth or rugulose, tubercles white or greenish; usually with distinct adaxial acentral keel; margins acute or rounded, marginal tubercles often merging apically to form continuous white band; apex acute, rarely retuse, mucronate
  • Inflorescence a laxly flowered raceme or panicle; erectly spreading to horizontal, often pink in upper half; bracteate
  • Flowers tubular, usually markedly bulbous (gasteriform) at base for up to two-thirds of its length, curved upwards and outwards, usually borne pendulously secund, pedicellate
  • Perianth segments with apices free, fused above when wilted; usually 3-coloured, reddish pink, green and with short, yellow or white-tipped lobes, rarely nearly white or uniformly pink with yellow
  • Stamens included or barely exserted; filaments white, filiform, slightly flattened
  • Ovary oblong-ovoid, with many axile ovules; style filiform; stigma minute, becoming shortly exserted, exceeding anthers after anthesis
  • Capsule erect, green, cylindric, oblong to oblong-ovoid, apically truncate, chartaceous to woody when dry
  • Seeds dark brown to black, irregularly angled, laterally compressed, obscurely winged
  • x = 7

Nomenclature:

  • Gasteria Duval
    • Duval: 6 (1809)
    • Baker: 286 (1896-1897)
    • Berger: 122 (1908)
    • Phillips: 148 (1926)
    • Phillips: 186 (1951)
    • Schelpe: 17 (1958)
    • Sölch et al.: 49 (1970)
    • Van Jaarsveld: 6 (1992)
    • Van Jaarsveld: 33 (1994)
    • Van Jaarsveld et al.: 468 (1994)
    • Van Jaarsveld: 65 (1998)

Distribution & Notes:

  • Global: Southern Africa and Mozambique
  • Southern Africa: Species 18 and varieties 8, mainly in the Western and Eastern Cape, with outliers in Namibia, Northern Cape, Mpumalanga, KwaZulu-Natal

References:

  • BAKER, J.G. 1896-1897. Liliaceae. Flora capensis 6
  • BERGER, A. 1908. Liliaceae-Asphodeloideae-Aloineae. Subtrib. II. Aloinae. Das Pflanzenreich IV, 38, III, II (Heft 33). Wilhelm Engelmann, Leipzig
  • DUVAL, H.A. 1809. Plantae succulentae in horto Alenconio. Gabon, Paris
  • PHILLIPS, E.P. 1926. The genera of South African flowering plants. Memoirs of the Botanical Survey of South Africa No. 10
  • PHILLIPS, E.P. 1951. The genera of South African flowering plants. Memoirs of the Botanical Survey of South Africa No. 25
  • SCHELPE, E.A.C.L.E. 1958. Gasteria - a problem genus of South African succulent plants. The Journal of the Botanical Society of South Africa 44
  • SÖLCH, A., ROESSLER, H. & MERXMÜLLER, H. 1970. Liliaceae. Prodromus einer Flora von Südwestafrika 147
  • VAN JAARSVELD, E.J. 1992. A synopsis of the genus Gasteria. Aloe 29
  • VAN JAARSVELD, E.J. 1994. Gasterias of South Africa. Fernwood Press and the National Botanical Institute, Cape Town
  • VAN JAARSVELD, E.J. 1998. A new taxon and new combinations in the Gasteria carinata complex. Cactus and Succulent Journal (U.S.) 70
  • VAN JAARSVELD, E.J., SMITH, G.F. & VAN WYK, B-E. 1994. A cladistic analysis of Gasteria (Aloaceae). South African Journal of Science 90