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

Poaceae - Pooideae - Triticeae - Thinopyrum Á.Löve

Description :

  • Perennial, erect and rigid or creeping and rooting at nodes, stoloniferous
  • Leaf blade linear, expanded or rolled, rigid; ligule an unfringed membrane
  • Inflorescence a single true spike; spikelets solitary, sessile to subsessile, appressed to rachis, rachis disarticulating and spikelets falling with internode below
  • Spikelet (15)28-40 mm long, laterally compressed, falling with glumes; glumes ± equal, shorter than spikelet, similar, many-nerved, awnless
  • Florets 5-11, bisexual, uppermost floret reduced; lemma similar in texture to glumes, glabrous, 5-nerved, usually 3-toothed, awned, awn minute, straight; palea present, keels winged
  • Lodicules 2, membranous, ciliate
  • Stamens 3
  • Ovary hairy
  • x = 7 (polyploidy)

Nomenclature:

  • Thinopyrum Á.Löve
    • Löve: 351 (1980)
    • Chippindall: 69 (1955) under Agropyron Gaertn.
    • Löve: 475 (1984)
    • Clayton & Renvoize: 150 (1986) included in Elymus L.
    • Gibbs Russell et al.: 336 (1990)
    • Watson & Dallwitz: 942 (1994)

Distribution & Notes:

  • Global : Species ± 5, coasts of Europe
  • Southern Africa : Species 1: Thinopyrum distichum (Thunb.) A.Löve, Western and Eastern 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. 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
  • LÖVE, Á. 1980. Chromosome number reports LCVII. Taxon 29
  • LÖVE, Á. 1984. Conspectus of the Triticeae . Feddes Repertorium 95
  • WATSON, L. & DALLWITZ, M.J. 1994. The grass genera of the world , revised edn. CAB International, Oxon