e-Key <span id="jodit_selection_marker_1707814098300_4510719905146423" data-jodit_selection_marker="start" style="line-height: 0; display: none;"></span>v3 - Centro<span id="jodit_selection_marker_1707814098300_859782387959485" data-jodit_selection_marker="end" style="line-height: 0; display: none;"></span>podia
SANBI Flora Keys Logo
Interactive keys to the identification of seed plants of southern Africa using keys based on plant morphology.

Poaceae - Arundinoideae - Arundineae - Centropodia Rchb.

Description:

  • Perennial or annual, tufted to decumbent, rhizomatous
  • Leaf blade linear or setaceous, somewhat rigid, flat or rolled and pungent; ligule a fringe of hairs
  • Inflorescence a panicle, dense and contracted; spikelets solitary, pedicelled or subsessile
  • Spikelet 7.5-24.0 mm long, lanceolate, laterally compressed, disarticulating above glumes and ± between florets; glumes ± equal, as long as to longer than spikelet, similar, firm, with hyaline margin, prominently 5-11-nerved, separated by an internode, awnless; upper glume somewhat narrower than lower, usually acuminate
  • Florets 3-6, bisexual or sometimes upper floret male, sterile and reduced to a small scale; lemma similar in texture to glumes, membranous, prominently 7-11-nerved, densely and shortly hairy between nerves and with tufts of hairs at point of insertion of median awn, 2-lobed, lobes narrow, hyaline and tapering into short straight lateral awns, central awn arising from sinus, geniculate; callus obliquely pungent, hairy; palea membranous, obtuse or 2-lobed, 2-keeled, keels winged
  • Lodicules 2, glabrous, cuneate, fleshy
  • Stamens 3
  • Ovary glabrous; styles long, densely plumose
  • x = 6 (high polyploidy)

Nomenclature:

  • Centropodia Rchb.
    • Reichenbach: 212a (1828)
    • Chippindall: 246 (1955) under Danthonia Stapf
    • Conert: 239 (1962) under Asthenatherum Nevski
    • Hubbard: 122 (1970) under Asthenatherum Nevski
    • Cope: 657 (1982)
    • Clayton & Renvoize: 177 (1986)
    • Gibbs Russell et al.: 80 (1990)
    • Watson & Dallwitz: 214 (1994)
  • Asthenatherum Nevski
    • Nevski: 8 (1934)

Distribution & Notes:

  • Global: Species 4, North Africa through Middle East to India
  • Southern Africa: Species 2, Namibia, Botswana to Northern 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
  • CONERT, H.J. 1962. Über die Gramineen-Gattung Asthenatherum Nevski. Senckenbergiana Biologica 43
  • COPE, T.A. 1982. Centropodia: an earlier name for Asthenatherum (Gramineae). Kew Bulletin 37
  • 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
  • HUBBARD, C.E. 1970. Flora of tropical East Africa. Gramineae (Part 1)
  • NEVSKI, S.A. 1934. Asthenatherum. Trudy Sredne-Azialskogo universiteta Kazahstanskaja serija 8b, 17
  • REICHENBACH, H.G.L. 1828. Conspectus regni vegetabilis. C. Cnobloch, Leipzig
  • WATSON, L. & DALLWITZ, M.J. 1994. The grass genera of the world, revised edn. CAB International, Oxon