e-Key <span id="jodit_selection_marker_1709025624485_6753578511453155" data-jodit_selection_marker="start" style="line-height: 0; display: none;"></span>v3 - <span id="jodit_selection_marker_1709025624485_09680618649675377" data-jodit_selection_marker="end" style="line-height: 0; display: none;"></span>Devia
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Interactive keys to the identification of seed plants of southern Africa using keys based on plant morphology.

Iridaceae - Ixioideae - Devia Goldblatt & J.C.Manning

Description:

  • Deciduous perennials
  • Rootstock a depressed-globose corm rooting from below, basal in origin, tunics of coarse fibres accumulating in a dense mass
  • Stem aerial, branched, terete, sheathed below by a thick, coarsely fibrous neck
  • Leaves several, lower 2 or 3 cataphylls; foliage leaves unifacial, with a definite midrib, mostly basal, linear, oval in transverse section, midrib and a second pair of veins on either side heavily thickened, surface thus with 2 narrow longitudinal grooves on each surface, margins unthickened, edged by narrow grooves, dry or becoming dry at flowering time, cauline leaves few and reduced
  • Inflorescence a spike, flowers secund; bracts coriaceous, dry at anthesis, inner ± as long as outer and notched apically
  • Flowers actinomorphic, trumpet-shaped, pink, unscented, with nectar from septal nectaries; perianth tube narrowly funnel-shaped
  • Tepals subequal, suberect, enclosing filaments
  • Stamens symmetrically disposed, rotated counterclockwise; filaments arising in throat; anthers opposite inner tepals, facing inward, exserted from flower; pollen monosulcate, operculate, exine perforate
  • Style eccentric, branches short, notched apically
  • Capsules globose, cartilaginous, lightly verrucose above
  • Seeds globose, flattened at chalazal end, hard and shiny, 1 or 2 per locule, smooth, surface laevigate, raphal vascular trace excluded
  • x = 10

Classification Notes:

  • Perhaps most closely allied to Crocosmia, Devia is distinctive in its longitudinally grooved, narrow leaves, pink perianth and rotated stamens
  • It differs in all these features, as well as in its base number of x = 10, from Crocosmia but has internal leaf anatomy and capsule and seed characters that are consistent with this genus and its allies, Chasmanthe and Tritonia

Nomenclature:

  • Devia Goldblatt & J.C.Manning
    • Goldblatt & Manning: 362 (1990)
    • Goldblatt: 149 (1999)

Distribution & Notes:

  • Southern Africa: Species 1, Roggeveld Escarpment in the western Karoo (Northern/Western Cape), on clay soils in mountain renosterveld; unusual in flowering in the summer in this area of low, predominantly winter rainfall

Additional Notes:

  • The inconspicuous flowers are visited and presumably pollinated by various long-tongued insects including flies in the family Bombyliidae and bees in the family Anthophoridae

References:

  • GOLDBLATT, P. 1999. Devia, Sparaxis. Flora of southern Africa 7,2, fascicle 1
  • GOLDBLATT, P. & MANNING, J.C. 1990. Devia xeromorpha, a new genus and species of Iridaceae-Ixioideae from the Cape Province, S. Africa. Annals of the Missouri Botanical Garden 77