e-Key <span id="jodit_selection_marker_1707808886479_8031853260803901" data-jodit_selection_marker="start" style="line-height: 0; display: none;"></span>v3 - Chaetob<span id="jodit_selection_marker_1707808886480_4774269502232924" data-jodit_selection_marker="end" style="line-height: 0; display: none;"></span>romus
SANBI Flora Keys Logo
Interactive keys to the identification of seed plants of southern Africa using keys based on plant morphology.

Poaceae - Arundinoideae - Arundineae - Chaetobromus Nees

Description:

  • Perennial, tufted to mat-forming, sometimes stoloniferous or rooting from lower nodes
  • Leaf blade linear to linear-lanceolate, flat or folded; ligule a fringe of hairs
  • Inflorescence a panicle, open to contracted, sometimes with only a few spikelets; spikelets solitary, pedicelled, pedicel articulated some distance below spikelet, long-hairy at articulation
  • Spikelet 9-18 mm long, laterally compressed, falling with glumes and disarticulating between florets; glumes ± equal, as long as to longer than spikelet, keeled, membranous, pubescent, scabrid especially on nerves, awnless; lower glume 5-11-nerved; upper glume narrower, prominently and closely 3-5-nerved
  • Florets 2-4; lower floret bisexual; upper floret reduced; lemmas decreasing in size upwards, lowest lemma 2.5-5.8 mm long, membranous, 7-9-nerved, glabrous or loosely hairy, 2-lobed, lobes with slender, usually long awns or lower lemma awnless, central awn arising between lobes, awn twisted in lower part, geniculate or straight; callus pungent, hairy; palea obscurely 2-nerved, hyaline
  • Lodicules 2, fleshy, cuneate, glabrous
  • Stamens 3
  • Ovary glabrous; styles plumose above
  • Caryopsis lorate, pale brown or yellow, surface smooth, dull
  • x = 6

Nomenclature:

  • Chaetobromus Nees
    • Nees ab Esenbeck: 449 (1836)
    • Stapf: 537 (1899)
    • Chippindall: 272 (1955)
    • Clayton & Renvoize: 173 (1986)
    • Gibbs Russell et al.: 81 (1990)
    • Watson & Dallwitz: 219 (1994)
    • Verboom & Linder: 57 (1998)

Distribution & Notes:

  • Southern Africa: Species 1, S Namibia, Northern and Western Cape

References:

  • CHIPPINDALL, L.K.A. 1955. A guide to the identification of grasses in South Africa. In D. Meredith, The grasses and pastures of South Africa. Central News Agency, Cape Town
  • CLAYTON, W.D. & RENVOIZE S.A. 1986. Genera graminum. Grasses of the world. Kew Bulletin. Additional series 13
  • GIBBS RUSSELL, G.E., WATSON, L., KOEKEMOER, M., SMOOK, L., BARKER, N.P., ANDERSON, H.M. & DALLWITZ. M.J. 1990. Grasses of southern Africa. Memoirs of the Botanical Survey of South Africa No. 58
  • NEES AB ESENBECK, C.G.D. 1836 In J. Lindley, A natural system of botany. Gramineae, edn 2. Longmans et al., London
  • STAPF, O. 1898-1900. Gramineae. Flora capensis 7
  • VERBOOM, G.A. & LINDER, H.P. 1998. A re-evaluation of species limits in Chaetobromus (Danthonieae: Poaceae). Nordic Journal of Botany 18
  • WATSON, L. & DALLWITZ, M.J. 1994. The grass genera of the world, revised edn. CAB International, Oxon