e-Key v3 - *Deschampsia
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Interactive keys to the identification of seed plants of southern Africa using keys based on plant morphology.

Poaceae - Pooideae - Aveneae - Aveninae - *Deschampsia P.Beauv.

Description :

  • Perennial, rarely annual, tufted
  • Leaf blade filiform to linear, flat or folded; ligule an unfringed membrane, often elongated
  • Inflorescence a panicle, lax and open, rarely contracted; spikelets pedicelled
  • Spikelet small, 3-6 mm long, shining, laterally compressed, disarticulating above glumes and between florets, rachilla pilose or rarely glabrous, distinctly elongated between florets, produced as a fine bristle; glumes ± equal, shorter to longer than spikelet, similar, subscarious to membranous with thin shining margins, keeled, mostly acute; lower glume 1-nerved; upper glume 1-3-nerved
  • Florets usually 2, bisexual, rarely uppermost floret reduced; lemma similar in texture to firmer than glumes, lanceolate, rounded on back, obscurely 4-7-nerved, 2-4-lobed or lacerate-truncate at apex, awned from back near base; awn straight or geniculate, as long as to longer than body of lemma; callus minute, obtuse, usually hairy; palea ± as long as lemma, 2-keeled
  • Stamens 3
  • Ovary ellipsoid, glabrous; styles plumose above
  • Caryopsis ellipsoid, glabrous
  • x = 7, 13 (aneuploids, high polyploidy, B-chromosomes)

Nomenclature:

  • *Deschampsia P.Beauv.
    • Palisot de Beauvois: 91 (1812)
    • Chippindall: 84 (1955)
    • Clayton: 91 (1970)
    • Clayton & Renvoize: 129 (1986)
    • Gibbs Russell et al.: 103 (1990)
    • Watson & Dallwitz: 307 (1994)

Distribution & Notes:

  • Global : Species ± 40, temperate regions throughout the world and high-altitude tropics
  • Southern Africa : Species 2, naturalised, Free State, Lesotho, Eastern Cape region bordering Lesotho and 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. 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., 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
  • WATSON, L. & DALLWITZ, M.J. 1994. The grass genera of the world , revised edn. CAB International, Oxon