e-Key <span id="jodit_selection_marker_1705919592343_6106866421695076" data-jodit_selection_marker="start" style="line-height: 0; display: none;"></span>v3 - Alloter<span id="jodit_selection_marker_1705919592343_02033896227345222" data-jodit_selection_marker="end" style="line-height: 0; display: none;"></span>opsis
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Interactive keys to the identification of seed plants of southern Africa using keys based on plant morphology.

Poaceae - Panicoideae - Paniceae - Setariinae - Alloteropsis J.Presl

Description:

  • Annual or perennial, tufted or decumbent
  • Leaf blade expanded or ± convolute, linear to lanceolate, glabrous or hairy with tubercle-based hairs; ligule a fringed membrane or a fringe of hairs
  • Inflorescence of spike-like, 1-sided racemes, digitate or subdigitate, usually on a short central axis; spikelets 2- or 3-nate, rarely solitary or in clusters, unequally pedicelled
  • Spikelet falling with glumes, ovate to elliptic, dorsiventrally compressed; glumes unequal; lower glume shorter than spikelet, membranous, acute to acuminate, pubescent, 3-5-nerved, usually awnless; upper glume equalling lemma, elliptic, sometimes with broad auricled flaps, membranous to chartaceous, 5-nerved, hairy on margins
  • Florets 2; lower floret male or sterile, lemma resembling upper glume but not hairy, indurated, 3-5-nerved; palea shorter than lemma, deeply 2-lobed with marginal flaps, awnless; upper floret bisexual, lemma similar in texture to glumes, membranous to chartaceous, margins flat and exposed on palea, covering most of palea, 5-nerved, long attenuate into an awn or mucro, awn straight; palea as long as lemma, 2-keeled
  • Lodicules 2, broadly cuneate
  • Stamens 3
  • Ovary glabrous; styles plumose above
  • Caryopsis ellipsoid to oblong
  • x = 9 (polyploidy)

Nomenclature:

  • Alloteropsis J.Presl
    • Presl: 343 (1830)
    • Stapf: 482 (1919)
    • Chippindall: 423 (1955)
    • Butzin: 123 (1968)
    • Clayton & Renvoize: 615 (1982)
    • Clayton & Renvoize: 282 (1986)
    • Clayton: 58 (1989)
    • Gibbs Russell et al.: 36 (1990)
    • Watson & Dallwitz: 91 (1994)

Distribution & Notes:

  • Global: Species ± 8, Old World tropics
  • Southern Africa: Species 3, Namibia (Caprivi), northern provinces of South Africa, Swaziland, Free State, KwaZulu-Natal and Eastern Cape

References:

  • BUTZIN, F. 1968. Bemerkungen zum Umfang und zur Morphologie der Paniceengattung Alloteropsis. Willdenowia 5
  • 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. 1989. Gramineae. Flora zambesiaca 10, 3
  • CLAYTON, W.D. & RENVOIZE, S.A. 1982. Flora of tropical East Africa. Gramineae (Part 3)
  • 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
  • PRESL, J.S. 1830. Gramineae. In C. Presl, Reliquiae haenkeanae. J.G. Calve, Prague
  • STAPF, O. 1917-1920. Gramineae. Flora of tropical Africa 9
  • WATSON, L. & DALLWITZ, M.J. 1994. The grass genera of the world, revised edn. CAB International, Oxon