e-Key <span id="jodit_selection_marker_1709293494839_9671917900563796" data-jodit_selection_marker="start" style="line-height: 0; display: none;"></span>v3 - Erioch<span id="jodit_selection_marker_1709293494839_18280605176840448" data-jodit_selection_marker="end" style="line-height: 0; display: none;"></span>rysis
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Interactive keys to the identification of seed plants of southern Africa using keys based on plant morphology.

Poaceae - Panicoideae - Andropogoneae - Saccharinae - Eriochrysis P.Beauv.

Description:

  • Perennial, tufted
  • Leaf blade narrow, usually expanded; ligule a long-fringed membrane or fringe of hairs
  • Inflorescence contracted, fulvous or rufous, of several short, spike-like racemes ± appressed along elongated central axis; rachis fragile, internodes and pedicels linear to clavate; spikelets paired, in long-short combinations: one sessile, the other pedicelled, pedicels free
  • Sessile spikelet deciduous with contiguous joint of rachis and pedicel, dorsiventrally compressed, falling with glumes, elliptic; glumes ± equal, hairy, dissimilar; lower glume indurated, broadly rounded on back, ± 2-keeled with inflexed margins, nerves generally indistinct; upper glume thinner, not 2-keeled, 1-3-nerved
  • Florets 2; lower floret reduced to a hyaline, lanceolate lemma, awnless; upper floret bisexual; lemma less firm than glumes, hyaline, muticous or mucronate; callus short, truncate, hairy, hairs usually tawny, half as long as to longer than spikelet; palea small, hyaline, nerveless
  • Lodicules 2, cuneate
  • Stamens 3
  • Ovary glabrous; styles 2, plumose
  • Caryopsis ellipsoid
  • Pedicelled spikelet slightly smaller than sessile one, deciduous with pedicel, female; palea small
  • x = 10

Nomenclature:

  • Eriochrysis P.Beauv.
    • Palisot de Beauvois: 8 (1812)
    • Stapf: 321 (1898) under Saccharum L.
    • Stapf: 91 (1917)
    • Chippindall: 475 (1955)
    • Clayton & Renvoize: 706 (1982)
    • Clayton & Renvoize: 331 (1986)
    • Gibbs Russell et al.: 165 (1990)
    • Watson & Dallwitz: 395 (1994)

Distribution & Notes:

  • Global: Species 7, Africa and tropical America, 1 species in India
  • Southern Africa: Species 2, N Botswana, northern provinces of South Africa, Swaziland, KwaZulu-Natal and 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. 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
  • PALISOT DE BEAUVOIS, A.M.F.J. 1812. Essai d'une nouvelle agrostographie. Fain, Paris
  • STAPF, O. 1898-1900. Gramineae. Flora capensis 7
  • 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