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

Poaceae - Arundinoideae - Aristideae - Stipagrostis Nees

Description :

  • Perennial (sometimes short-lived) or annual, densely tufted, sometimes shrubs or dwarf shrubs, erect to geniculate, often with a well developed knotty rhizomatous base
  • Leaf blade usually long and narrow; ligule a dense fringe of hairs
  • Inflorescence a narrow or open panicle, sometimes spike-like, often interrupted; spikelets solitary or in fascicles, pedicelled
  • Spikelet disarticulating above glumes; glumes ± equal or unequal, narrow, as long as to longer than spikelet, 3-11-nerved, glabrous or hairy, obtuse to acuminate, awnless; lower glume usually 3-nerved
  • Floret 1, bisexual; lemma narrow, cylindrical, firmer than glumes, ventrally grooved or margins involute, indurated at maturity, 3-awned, appearing as 1 awn with 3 branches due to fusion, rarely solitary as laterals reduced; awns with or without a column, all, or only central awn plumose or with a pencil of hairs at apex of column, articulation present at or above middle of lemma or between base of column and body of lemma, or 0; callus well developed, pungent or minutely bifid, usually oblique, bearded or glabrous; palea usually much less than half as long as lemma, indurated, 2-nerved, glabrous
  • Lodicules usually 2, or 0, obtuse
  • Stamens 3
  • Ovary glabrous; styles free, plumose above
  • x = 11 (polyploidy)

Nomenclature:

  • Stipagrostis Nees
    • Nees ab Esenbeck: 290 (1832)
    • Stapf: 551 (1899)
    • Henrard: 1 (1926-1933) under Aristida L.
    • Henrard: 45 (1929-1933) under Aristida L.
    • Chippindall: 291 (1955) under Aristida L.
    • Pilger: 123 (1956)
    • De Winter: 307 (1965)
    • Clayton: 137 (1970)
    • Launert: 187 (1970)
    • Melderis: 131 (1971)
    • Clayton & Renvoize: 185 (1986)
    • Gibbs Russell et al.: 318 (1990)
    • Watson & Dallwitz: 910 (1994)

Distribution & Notes:

  • Global : Species ± 50, Africa, NW India and SW Asia
  • Southern Africa : Species 29, widespread

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
  • DE WINTER, B 1965. The South African Stipeae and Aristideae ( Gramineae ). (An anatomical, cytological and taxonomic study). Bothalia 8
  • 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
  • HENRARD, J.T.H. 1926-1933. A critical revision of the genus Aristida . Mededeelingen van's Rijksherbarium te Leiden 54 (1926), 54A (1927), 54B (1928) & 54C (1933)
  • HENRARD, J.T.H. 1929-1933. A monograph of the genus Aristida . Mededeelingen van's Rijksherbarium te Leiden 58 (1929), 58A (1932), 58B (1933)
  • LAUNERT, E. 1970. Gramineae . Prodromus einer Flora von Südwestafrika 160
  • MELDERIS, A. 1971. Flora zambesiaca 10, 1
  • NEES AB ESENBECK, C.G.D. 1832. Plantae Ecklonianae . Gramineae . Linnaea 7
  • PILGER, R.K.F. 1956. Gramineae II. Die natürlichen Pflanzenfamilien , edn 2, 14d
  • 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