e-Key <span id="jodit_selection_marker_1709024679808_4303164125894443" data-jodit_selection_marker="start" style="line-height: 0; display: none;"></span>v3 - Danthoni<span id="jodit_selection_marker_1709024679808_7152155347903162" 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 - Arundinelleae - Danthoniopsis Stapf

Description:

  • Perennial, rarely annual, tufted
  • Leaf blade linear or lanceolate-linear, expanded; ligule a fringe of hairs
  • Inflorescence an open or contracted panicle; spikelets paired, rarely in threes or solitary, pedicelled, pedicels free
  • Spikelet 4-20 mm long, laterally compressed, disarticulating above glumes; glumes very unequal, scarious-membranous to chartaceous, rarely thinly coriaceous, 3-5-nerved, glabrous, dissimilar; lower glume not more than half the length of upper; upper glume lanceolate, ovate, oblong
  • Florets 2; lower floret male with lemma similar to upper glume, as long as or slightly shorter than spikelet, (3)5-9-nerved, awnless; palea membranous, narrow, 2-keeled with keels very narrowly winged; upper floret bisexual, lemma 7-9-nerved, similar in texture to glumes, hairy, hairs in 2-8 distinct tufts or fringes or tufts mixed with dispersed hairs, deeply 2-lobed, lobes acute, sometimes produced into fine scaberulous awns, awned from between lobes; awn geniculate, twisted below bend; callus short, square to oblong, obtuse; palea similar to that of lower floret but keels firmer and usually with wider wings; wings expanded into ± triangular or clavate appendages
  • Lodicules 2, cuneate, fleshy
  • Stamens 3
  • Ovary glabrous; styles distinct, plumose above
  • x = 12 (1 report, polyploidy)

Nomenclature:

  • Danthoniopsis Stapf
    • Stapf: t. 3075 (1916)
    • Chippindall: 285 (1955)
    • Conert: 317 (1957)
    • Clayton & Renvoize: 317 (1986)
    • Clayton: 199 (1989)
    • Gibbs Russell et al.: 101 (1990)
    • Watson & Dallwitz: 298 (1994)

Distribution & Notes:

  • Global: Species ± 20, Africa, Arabian Peninsula
  • Southern Africa: Species 6, Namibia into Northern Cape, Northern Province, Mpumalanga and KwaZulu-Natal

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
  • CLAYTON, W.D. 1989. Gramineae. Flora zambesiaca 10, 3
  • CONERT, H.J. 1957. Beiträge zur Monographie der Arundinelleae. Botanische Jahrbücher 77
  • 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
  • STAPF, O. 1916. Danthoniopsis gossweileri Stapf. Hooker's Icones Plantarum 31
  • WATSON, L. & DALLWITZ, M.J. 1994. The grass genera of the world, revised edn. CAB International, Oxon