e-Key <span id="jodit_selection_marker_1709028033002_800055371711579" data-jodit_selection_marker="start" style="line-height: 0; display: none;"></span>v3 - Di<span id="jodit_selection_marker_1709028033002_8052448135868511" data-jodit_selection_marker="end" style="line-height: 0; display: none;"></span>nebra
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Interactive keys to the identification of seed plants of southern Africa using keys based on plant morphology.

Poaceae - Chloridoideae - Eragrostideae - Eleusininae - Dinebra Jacq.

Description:

  • Annual, tufted to decumbent
  • Leaf blade expanded, linear, glabrous; ligule a narrow fringed membrane
  • Inflorescence narrow with many dense, short, very compact spikes on a central axis, these becoming deflexed at maturity, lower spikelets of each spike often replaced by small deciduous branchlets, rachis of spikes flattened; spikelets solitary, sessile
  • Spikelet 5.7-9.0 mm long, laterally compressed, disarticulating above glumes and between florets, wedge-shaped; glumes ± equal, as long as to longer than spikelet, lanceolate, glabrous, long-acuminate, tapering into a short, straight awn, 1-nerved, keeled, scabrid on keels
  • Florets 1-3, bisexual but uppermost floret reduced; lemma less firm to similar in texture to glumes, membranous, lanceolate, acute, 3-nerved, keeled, glabrous or pilose around lower half of back and along lateral nerves, usually minutely 2-toothed and mucronate at apex; palea as long as lemma, bidentate, 2-keeled, membranous, pilose on flaps alongside keels
  • Lodicules 2
  • Stamens 3
  • Ovary glabrous; styles distinct, short, plumose
  • Caryopsis ellipsoid-oblong
  • x = 10

Nomenclature:

  • Dinebra Jacq.
    • Jacquin: 77 (1809)
    • Stent: 291 (1924)
    • Chippindall: 185 (1955)
    • Phillips: 411 (1973)
    • Phillips: 272 (1974)
    • Clayton & Renvoize: 214 (1986)
    • Gibbs Russell et al.: 116 (1990)
    • Watson & Dallwitz: 336 (1994)

Distribution & Notes:

  • Global: Species 3, Africa to India and Madagascar
  • Southern Africa: Species 1: Dinebra retroflexa (Vahl) Panz. var. condensata S.M.Phillips, Namibia, Botswana, northern provinces of South Africa

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
  • JACQUIN, N.J. Baron VON. 1809. Fragmenta botanica 6. Published by the author, Vienna
  • PHILLIPS, S.M. 1973. The genus Dinebra Jacq. (Gramineae). Kew Bulletin 28
  • PHILLIPS, S.M. 1974. Flora of tropical East Africa. Gramineae (Part 2)
  • STENT, S.M. 1924. South African Gramineae. Grasses of the Transvaal as represented in the National Herbarium. Bothalia 1
  • WATSON, L. & DALLWITZ, M.J. 1994. The grass genera of the world, revised edn. CAB International, Oxon