e-Key <span id="jodit_selection_marker_1709028133860_5839477430848403" data-jodit_selection_marker="start" style="line-height: 0; display: none;"></span>v3 - Di<span id="jodit_selection_marker_1709028133860_9331787867073826" data-jodit_selection_marker="end" style="line-height: 0; display: none;"></span>ntera
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Interactive keys to the identification of seed plants of southern Africa using keys based on plant morphology.

Scrophulariaceae - Scrophularioideae - Gratioleae - Dintera Stapf

Description:

  • Dwarf, submerged, turf-forming, aquatic herbs; stems branching chiefly near base, broadly 4-winged
  • Leaves opposite, sessile, ovate, semi-amplexicaul, acute
  • Flowers cleistogamous, minute, leaf-axillary, solitary, sessile, ebracteate
  • Calyx deeply 5(6)-lobed, accrescent; lobes oblong, obtuse, much longer than tube
  • Corolla bilabiate, 5-lobed, ellipsoid, ± as long as calyx; tube sprinkled with sessile glands inside on anterior part, closed by minute lips; upper lip outside in bud, shortly 2-lobed; lower lip 3-lobed, somewhat shorter than upper
  • Stamens 2, anterior; filaments very short, glabrous, arising above middle of corolla tube, bithecate; thecae unequal, indehiscent or imperfectly dehiscent, connective between thecae distinct; staminodes 0
  • Ovary unilocular, ellipsoid-globose; ovules many; placentas parietal, bifurcate, shield-shaped; style very short; stigma somewhat thickened
  • Fruit an orbicular-obovate capsule, somewhat compressed on one side, septicidal at apex or bursting irregularly
  • Seeds many, oblong, ± compressed, pitted

Nomenclature:

  • Dintera Stapf
    • Stapf: 27, t. 1, A (1900)
    • Hemsley & Skan: 350 (1906)
    • Merxmüller & Roessler: 24 (1967)

Distribution & Notes:

  • Southern Africa: Monotypic, Dintera pterocaulis Stapf, Namibia (Waterberg plateau)

References:

  • HEMSLEY, W.B. & SKAN, S.A. 1906. Scrophulariaceae. Flora of tropical Africa 4
  • MERXMÜLLER, H. & ROESSLER, H. 1967. Scrophulariaceae. Prodromus einer Flora von Südwestafrika 126
  • STAPF, 0. 1900. Dintera. Mémoires de l'Herbier Boissier 20