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

Poaceae - Chloridoideae - Eragrostideae - Eleusininae - Pogonarthria Stapf

Description :

  • Annual or perennial, tufted, sometimes rhizomatous
  • Leaf blade linear, expanded or rolled; ligule a fringe of hairs
  • Inflorescence of many 1-sided, spike-like racemes on a long central axis; racemes solitary or whorled, sometimes stiff, spreading, straight or curved like a herringbone; spikelets solitary, shortly pedicelled
  • Spikelet 3-10 mm long, laterally compressed, disarticulating above glumes and variously between florets; glumes very unequal, similar, shorter than spikelet, coriaceous, acute or acuminate, keeled, 1-nerved, awnless; lower glume ± half as long as upper
  • Florets 4-11, bisexual, sometimes uppermost reduced, decreasing in size upwards; lemma similar in texture to glumes, membranous, lanceolate or ovate-lanceolate, 3-nerved, glabrous, entire, acute, acuminate or minutely awned; callus 0; palea shorter than lemmas, acute, 2-keeled, similar in texture to lemma
  • Lodicules 2, minute, delicate, glabrous
  • Stamens 3
  • Ovary glabrous; styles distinct, plumose
  • Caryopsis ellipsoid to fusiform
  • x = 10 (7) (polyploidy)

Nomenclature:

  • Pogonarthria Stapf
    • Stapf: 316 (1898)
    • Stent: 295 (1924)
    • Chippindall: 184 (1955)
    • Launert: 303 (1966)
    • Launert: 152 (1970)
    • Phillips: 267 (1974)
    • Clayton & Renvoize: 220 (1986)
    • Gibbs Russell et al.: 272 (1990)
    • Watson & Dallwitz: 756 (1994)

Distribution & Notes:

  • Global : Species 4, Africa
  • Southern Africa : Species 3, widespread, not recorded from 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. 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
  • LAUNERT, E. 1966. A brief survey of the genus Pogonarthria ( Gramineae , Eragrosteae , Eragrostineae ). Senckenbergiana Biologica 47
  • LAUNERT, E. 1970. Gramineae . Prodromus einer Flora von Südwestafrika 160
  • PHILLIPS, S.M. 1974. Flora of tropical East Africa . Gramineae (Part 2)
  • STAPF, O. 1898-1900. Gramineae . Flora capensis 7
  • STENT, S.M. 1924. South African Gramineae . Grasses of the Transvaal as represented in the National Herbarium. Bothalia 1
  • WATSON, L. & DALLWITZ, M.J. 1994. The grass genera of the world , revised edn. CAB International, Oxon