e-Key <span id="jodit_selection_marker_1707808626650_25613878265516754" data-jodit_selection_marker="start" style="line-height: 0; display: none;"></span>v3 - Chaetaca<span id="jodit_selection_marker_1707808626651_5964208044354853" data-jodit_selection_marker="end" style="line-height: 0; display: none;"></span>nthus
SANBI Flora Keys Logo
Interactive keys to the identification of seed plants of southern Africa using keys based on plant morphology.

Acanthaceae - Acanthoideae - Ruellieae - Petalidiinae - Chaetacanthus Nees

Description:

  • Shrublets or herbs, with woody rootstock or stolons
  • Leaves entire
  • Inflorescence axillary, dichasial cymes; bracteoles 2, usually shorter than calyx
  • Calyx regular; lobes 5; tube longer than lobes
  • Corolla 2-lipped; upper lip 2-lobed, rugula indistinct; lower lip 3-lobed; lobes oblong, truncate or obtuse; aestivation contorted; tube longer than lobes, pubescent, campanulate above
  • Androecium: fertile stamens 2; filaments of stamens and staminodes didynamous, arising in pairs in corolla throat; slightly exserted, linear; anthers 2-thecous; thecae parallel, oblong or linear-oblong, muticous; staminodes 2 or 0
  • Pollen prolate, 3-colporate, with many pseudocolpi; pore lipped; surface pusticulate
  • Disc annular
  • Gynoecium: ovary oblong, with 2 ovules in each locule; style terete, slightly exserted, pubescent; style branch 1; ventral lobe cylindriform
  • Capsule lanceolate, estipitate, with inelastic placental bases
  • Seeds biconvex, with hygroscopic hairs over whole surface

Classification Notes:

  • Could probably be united with Dyschoriste Nees

Nomenclature:

  • Chaetacanthus Nees
    • Nees von Esenbeck: 444 (1836)
    • Clarke: 18 (1901)

Distribution & Notes:

  • Global: Species ± 3, southern Africa
  • Southern Africa: Widespread, mainly in eastern parts

References:

  • CLARKE, C.B. 1901. Acanthaceae. Flora capensis 5,1
  • NEES VON ESENBECK, C.G.D. 1836. Blepharacanthus, Chaetacanthus. In J. Lindley, A natural system of botany, edn 2. Longman, London

Copyright of the content hosted by this website remains with the South African National Biodiversity Institute (SANBI), unless stated otherwise.
Material from this site may be used in other media, provided that SANBI is acknowledged by the name South African National Biodiversity Institute (SANBI) or refer to the 'How to cite this resource' paragraph on the Home page.
Liability disclaimer: Visitors use this site at their own risk and SANBI is not liable for any of the consequences resulting therefrom.