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

Araceae - Aroideae - Stylochaeton Lepr.

Description :

  • Acaulescent, tufted herbs, with branched nodose rhizomes bearing many long swollen roots
  • Leaves 1-4 per shoot, deciduous; petiole sheathing at base, often mottled with purple; lamina simple, sagittate, hastate or cordate at base
  • Inflorescence appearing before or contemporary with leaves, borne on short peduncles at ground level
  • Spathe tubular with margins connate towards base, limb slightly expanded, deciduous
  • Spadix shorter than spathe; female flowers below, male flowers above, separated by an interstice bearing sterile flowers
  • Flowers with perianth segments fused, boat-shaped or cupular, truncate and swollen above
  • Male flowers many; stamens 2-7, exserted on long free filaments; anthers opening by lateral slits; ovary rudimentary
  • Female flowers either few, arranged in a basal circle or many, forming spirals; staminodes lacking; ovary 1- or 2-locular; ovules 1-several per locule on axial placentas; style long; stigma capitate to broadly discoid
  • Fruit a berry, 1-few-seeded
  • Seeds ovoid, tessellate; with copious endosperm
  • x = 14

Nomenclature:

  • Stylochaeton Lepr.
    • Leprieur: 184 (1834)
    • Brown: 34 (1897) [As S tylochiton ]
    • Engler: 29 (1920)
    • Letty: 12 (1962)
    • Mayo: 42 (1985)
    • Mayo et al.: 151 (1997)
  • Stylochiton Schott
    • Schott: 10 (1855) orthographic variant

Distribution & Notes:

  • Global : Species ± 15, restricted to tropical and southern subtropical Africa
  • Southern Africa : Species 1: Stylochaeton natalensis Schott, Mpumalanga and KwaZulu-Natal

References:

  • BROWN, N.E. 1897. Aroideae . Flora capensis 7
  • ENGLER, A. 1920. Araceae - Pistioideae . Das Pflanzenreich 73
  • LEPRIEUR, F.R. 1834. Sur le Stylochaeton hypogeum . Annales des sciences naturelles, sér . 2, 2
  • LETTY, C. 1962. Wild flowers of the Transvaal . Hortors, Johannesburg
  • MAYO, S.J. 1985. Araceae . Flora of tropical East Africa
  • MAYO, S.J., BOGNER, J., BOYCE, P.C. 1997. The genera of Araceae . Royal Botanic Gardens, Kew
  • SCHOTT, H.W. 1855. Aroideae . C. Gerold, Vienna