e-Key <span id="jodit_selection_marker_1709286149894_9009592639064625" data-jodit_selection_marker="start" style="line-height: 0; display: none;"></span>v3 - Ehr<span id="jodit_selection_marker_1709286149895_6753209031584944" data-jodit_selection_marker="end" style="line-height: 0; display: none;"></span>harta
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Interactive keys to the identification of seed plants of southern Africa using keys based on plant morphology.

Poaceae - Bambusoideae - Ehrharteae - Ehrharta Thunb.

Description:

  • Annual or perennial, sometimes dwarf shrubs, rhizomatous or stoloniferous, sometimes with a bulb or corm, tufted or decumbent
  • Leaf blade linear to linear-lanceolate, expanded, folded or rolled, rarely much reduced; ligule a fringed or unfringed membrane, or a fringe of hairs
  • Inflorescence a panicle or reduced to a raceme with a few spikelets, or to a single spikelet, open or contracted, sometimes spike-like, rarely secund; spikelets solitary or sometimes clustered, pedicelled
  • Spikelet laterally to not noticeably compressed, disarticulating above glumes; glumes ± equal to unequal, shorter to longer than spikelet, membranous, similar, lanceolate or ovate-lanceolate, hairy or glabrous, 5-nerved, sometimes shortly mucronate, awnless
  • Florets 3; lower 2 florets sterile, reduced to lemmas, usually of similar size and differing from smaller bisexual lemma, occasionally first sterile lemma short and glume-like and second sterile lemma resembling bisexual lemma; sterile lemmas stiffly membranous, usually scabrid, one or both transversely rugose, tuberculate or smooth, hairy or glabrous, awnless or mucronate or awned from back or tapering into awn; awn longer or shorter than lemma body, sometimes bases of second sterile lemma and bisexual lemma coming together in a hinge-like joint resembling an earlobe, which may have a membranous appendage; uppermost floret bisexual; lemma firmer than glumes, smaller and more laterally compressed than sterile lemmas, 5-7-nerved, usually glabrous, rarely long-villous, sometimes mucronate, awnless; callus 0; palea linear or boat-shaped, almost as long as lemma, keeled, finely 2-nerved
  • Lodicules 2, large and flat, usually ovate or 2-lobed
  • Stamens 6 (5, 4, 3 or 1)
  • Ovary obovoid; styles free, plumose or brush-like above
  • Caryopsis ellipsoid
  • x = 12 (polyploidy)

Nomenclature:

  • Ehrharta Thunb.
    • Thunberg: 217 (1779) name conserved
    • Stapf: 660 (1900)
    • Stent: 275 (1924)
    • Chippindall: 34 (1955)
    • Clayton: 38 (1970)
    • Launert: 39 (1971)
    • Clayton & Renvoize: 76 (1986)
    • Gibbs Russell: 67 (1987)
    • Gibbs Russell & Ellis: 51 (1987)
    • Gibbs Russell et al.: 121 (1990)
    • Watson & Dallwitz: 361 (1994)

Distribution & Notes:

  • Global: Species ± 35, southern Africa to Ethiopia, Indonesia to New Zealand
  • Southern Africa: Species 22, mainly southern and western areas of the Cape region, a few widespread

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. 1970. Flora of tropical East Africa. Gramineae (Part 1)
  • CLAYTON, W.D. & RENVOIZE S.A. 1986. Genera graminum. Grasses of the world. Kew Bulletin. Additional series 13
  • GIBBS RUSSELL, G.E. 1987. Taxonomy of the genus Ehrharta (Poaceae) in southern Africa. Bothalia 17
  • GIBBS RUSSELL, G.E. & ELLIS, R.P. 1987. Species groups in the genus Ehrharta (Poaceae) in southern Africa. Bothalia 17
  • 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
  • LAUNERT, E. 1971. Gramineae. Flora zambesiaca 10, 1
  • STAPF, O. 1898-1900. Gramineae. Flora capensis 7
  • STENT, S.M. 1924. South African Gramineae. Grasses of the Transvaal as represented in the National Herbarium. Bothalia 1
  • THUNBERG, C.P. 1779. Ehrharta. Kongl. Vetenskaps academiens handlingar 40
  • WATSON, L. & DALLWITZ, M.J. 1994. The grass genera of the world, revised edn. CAB International, Oxon