e-Key <span id="jodit_selection_marker_1707212580065_4040655394809476" data-jodit_selection_marker="start" style="line-height: 0; display: none;"></span>v3 - Bothrio<span id="jodit_selection_marker_1707212580065_53060999404185" data-jodit_selection_marker="end" style="line-height: 0; display: none;"></span>chloa
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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 - Bothriochloa Kuntze

Description:

  • Perennial, tufted, sometimes decumbent or stoloniferous
  • Leaf blade linear, usually expanded; ligule an unfringed to a fringed membrane, often bearded at collar
  • Inflorescence of racemes, digitate, or subdigitate, or a panicle with a long central axis, or a spatheate, leafy false panicle (this may not be easily discernible), pedicels and internodes linear, longitudinally grooved with a translucent median line; spikelets usually paired, secund, in long-short combinations: one sessile, the other pedicelled, pedicels free from rachis
  • Sessile spikelet 3-4 mm long, dorsiventrally compressed, falling with glumes; glumes ± equal, dissimilar, firm to membranous; lower glume flattened on back, 2-keeled, sometimes with 1-3 pits in middle, hairy or glabrous, acute to subacute; upper glume distinctly keeled
  • Florets 2; lower floret sterile, reduced to hyaline lemma, awnless; upper floret bisexual, lemma less firm in texture than glumes, reduced to a hyaline stipe, glabrous, entire, awned, awn glabrous, geniculate, longer than body of lemma; callus short, rounded, hairy; palea reduced or 0
  • Lodicules 2
  • Stamens 3
  • Ovary ellipsoid, glabrous; styles plumose above
  • Caryopsis oblong, slightly dorsiventrally compressed
  • Pedicelled spikelet symmetrical, same size or smaller than sessile spikelet, glabrous, sterile or male, awnless.
  • x = 10 (high polyploidy)

Nomenclature:

  • Bothriochloa Kuntze
    • Kuntze: 762 (1891)
    • Stapf: 344 (1898)
    • Chippindall: 482 (1955)
    • Clayton & Renvoize: 719 (1982)
    • Clayton & Renvoize: 344 (1986)
    • Gibbs Russell et al.: 62 (1990)
    • Watson & Dallwitz: 175 (1994)

Distribution & Notes:

  • Global: Species ± 35, throughout the tropics
  • Southern Africa: Species 3, widespread but not in the Western 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
  • KUNTZE, C.E.O. 1891. Revisio generum plantarum vascularium omnium 2. A. Felix, Leipzig
  • STAPF, O. 1898-1900. Gramineae. Flora capensis 7
  • WATSON, L. & DALLWITZ, M.J. 1994. The grass genera of the world, revised edn. CAB International, Oxon