e-Key <span id="jodit_selection_marker_1708423281305_6432791953994179" data-jodit_selection_marker="start" style="line-height: 0; display: none;"></span>v3 - Chryso<span id="jodit_selection_marker_1708423281305_2850325830605398" data-jodit_selection_marker="end" style="line-height: 0; display: none;"></span>pogon
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Interactive keys to the identification of seed plants of southern Africa using keys based on plant morphology.

Poaceae - Panicoideae - Andropogoneae - Sorghinae - Chrysopogon Trin.

Description:

  • Perennial, tufted, often rhizomatous
  • Leaf blade linear, basal sheaths strongly compressed; ligule a fringed membrane or fringe of hairs
  • Inflorescence a terminal panicle consisting of many whorled branches on central axis, internodes filiform; spikelets dissimilar, in groups of 3, in long-short combinations: central spikelet sessile, two laterals pedicelled (rarely spikelets paired, one sessile, the other pedicelled), pedicels free from rachis, tops of pedicels long-hairy
  • Sessile spikelet ± laterally compressed, falling with glumes, joint and pedicel, awned or awnless; glumes ± equal; lower glume laterally compressed, indurated, rounded on back, often with spines on margins; upper glume thinner, keeled, shortly 2-lobed, sometimes awned from between lobes
  • Florets 2; lower floret sterile, reduced to a hyaline lemma, awnless; upper floret bisexual, lemma less firm than glumes, hyaline, glabrous, not keeled, 1-3-nerved, entire or minutely 2-lobed, awned from between lobes, awn geniculate; callus pungent, hairy, hairs long, commonly pallid or deep fulvous; palea small, hyaline or 0
  • Lodicules 2, glabrous
  • Stamens 3
  • Ovary ellipsoid; styles plumose above
  • Caryopsis narrowly ellipsoid
  • Pedicelled spikelet well developed to rudimentary, dorsally compressed, usually purple, sometimes pallid, male or sterile, awned or awnless
  • x = 10 (polyploidy)

Nomenclature:

  • Chrysopogon Trin.
    • Trinius: 187 (1820) name conserved
    • Stapf: 349 (1898) under Andropogon L.
    • Stapf: 159 (1917)
    • Chippindall: 468 (1955)
    • Clayton & Renvoize: 736 (1982)
    • Clayton & Renvoize: 342 (1986)
    • Gibbs Russell et al.: 85 (1990)
    • Watson & Dallwitz: 240 (1994)

Distribution & Notes:

  • Global: Species ± 26, mostly warm regions of both hemispheres
  • Southern Africa: Species 1: Chrysopogon serrulatus Trin., N Botswana, Northern Province and mainly North-West

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. 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
  • STAPF, O. 1898-1900. Gramineae. Flora capensis 7
  • STAPF, O. 1917-1920. Gramineae. Flora of tropical Africa 9
  • TRINIUS, C.B. 1820. Fundamenta agrostographiae. Heuber, Vienna
  • WATSON, L. & DALLWITZ, M.J. 1994. The grass genera of the world, revised edn. CAB International, Oxon