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

Iridaceae - Ixioideae - Xenoscapa (Goldblatt) Goldblatt & J.C.Manning

Description :

  • Seasonal perennials
  • Rootstock a small globose corm rooting from below, basal in origin, tunics of fine fibres
  • Stem short or long, erect, terete, often with 1-3 short branches
  • Leaves few, lower 2 or 3 cataphylls; foliage leaves 2 or 3, unifacial, with a definite midrib, prostrate, soft-textured
  • Inflorescence of solitary flowers terminal on axes; bracts green, coriaceous, inner often slightly longer, or slightly shorter than outer, often notched apically
  • Flowers zygomorphic, tubular or hypocrateriform, whitish or pink, sometimes with contrasting markings on lower tepals, sometimes sweetly scented, with nectar from septal nectaries; perianth tube cylindric and elongate
  • Tepals subequal, spreading or dorsal ones erect, slightly larger, and cucullate
  • Stamens unilateral and arcuate, arising shortly below mouth of tube; anthers exserted; pollen monosulcate, operculate, exine perforate
  • Style filiform, exserted, branches short, deeply divided and recurved
  • Capsules oblong to cylindric, cartilaginous
  • Seeds strongly angled, with a chalazal crest, rugulose, matte, surface areolate
  • x = 11

Classification Notes:

  • The relationships of the genus are uncertain

Nomenclature:

  • Xenoscapa (Goldblatt) Goldblatt & J.C.Manning
    • Goldblatt & Manning: 172 (1995)
  • Anomatheca Ker Gawl. section Xenoscapa Goldblatt
    • Goldblatt: 88 (1972)

Distribution & Notes:

  • Southern Africa : Species 2, 1 widespread in the winter-rainfall region and one highly localised in Namaqualand (Northern Cape), either on granite or clay soils

Additional Notes:

  • Xenoscapa uliginosa is pollinated by the long-proboscid fly, Prosoeca peringueyi (Nemestrinidae), and X. fistulosa , which has fragrant flowers, probably by moths

References:

  • GOLDBLATT, P. 1972. A revision of the genera Lapeirousia Pourret and Anomatheca Ker in the winter rainfall region of South Africa. Contributions from the Bolus Herbarium 4
  • GOLDBLATT, P. & MANNING, J.C. 1995. Phylogeny of the African genera Anomatheca and Freesia ( Iridaceae - Ixioideae ), and a new genus Xenoscapa . Systematic Botany 20