e-Key v3 - Bulbostylis
SANBI Flora Keys Logo
Interactive keys to the identification of seed plants of southern Africa using keys based on plant morphology.

Cyperaceae - Cyperoideae - Abildgaardieae - Bulbostylis Kunth

Description :

  • Annuals or perennials, mainly tufted
  • Culms with basal nodes
  • Leaves basal, ligulate or eligulate, slender, often pubescent; sheath with adaxial apex truncate, usually ciliate; blade usually setaceous, sometimes linear, flat, often very short or 0, without keeled midrib, profile thickly crescentiform
  • Inflorescence a single spikelet or capitate, or a simple or compound anthela
  • Spikelets of many spirally imbricate glumes, lowest 1 or 2 glumes empty, many above fertile, bisexual, uppermost with male florets or empty, nearly always pubescent on the back
  • Perianth 0
  • Stamens 2 or 3
  • Style linear, with swollen base, (2)3-branched, deciduous, leaving enlarged base as a small button on nut
  • Nutlet obovoid, 3-angled, trabeculate, rugose, warty, papillose or smooth
  • x = 5 (polyploidy)

Classification Notes:

  • The problem of the interrelationship between the generic concepts of Fimbristylis , Abildgaardia and Bulbostylis is discussed by Lye: 539 (1971) and Gordon-Gray: 549 (1971) respectively
  • Lye took positive action by making transfers from Bulbostylis to Abildgaardia , whereas Gordon-Gray expressed reservations
  • Gordon-Gray (1995) has accepted the genus as here defined
  • Recently Lye: 108 (1995) has again accepted the genus Bulbostylis ; the differences between Abildgaardia and Bulbostylis are summarised by Lye: 595 (1996)

Nomenclature:

  • Bulbostylis Kunth
    • Kunth: 205 (1837) name conserved
    • Clarke: 204 (1898)
    • Clarke: 427 (1902)
    • Schonland: 35 (1922)
    • Podlech: 4 (1967)
    • Gordon-Gray: 549 (1971)
    • Gordon-Gray: 110 (1972)
    • Compton: 72 (1976)
    • Bond & Goldblatt: 38 (1984)
    • Forbes: 35 (1987)
    • Gordon-Gray: 25 (1995)

Distribution & Notes:

  • Global : Species ± 100, mainly tropical Africa and tropical America
  • Southern Africa : Species ± 15, Namibia, Botswana, Northern Province, North-West, Gauteng, Mpumalanga, Free State, Swaziland, KwaZulu-Natal, Lesotho, Northern and Eastern Cape with 1 reaching the Cape Peninsula

References:

  • BOND, P. & GOLDBLATT, P. 1984. Plants of the Cape Flora: A descriptive catalogue. Journal of South African Botany Suppl . Vol. 13
  • CLARKE, C.B. 1898. Cyperaceae . Flora capensis 7
  • CLARKE, C.B. 1902. Cyperaceae . Flora of tropical Africa 8
  • COMPTON, R.H. 1976. Cyperaceae . Flora of Swaziland. Journal of South African Botany Suppl. Vol. 11
  • FORBES, P.L. 1987. Cyperaceae . In T.K. Lowrey & S. Wright, The Flora of the Witwatersrand Vol. 1: The Monocotyledonae. Witwatersrand University Press, Johannesburg
  • GORDON-GRAY, K.D. 1971. Fimbristylis and Bulbostylis : Generic limits as seen by a student of southern African species. AETFAT Proceedings. Mitteilungen der Botanischen Staatssammlung München 10
  • GORDON-GRAY, K.D. 1972. Cyperaceae . In J.H. Ross, The Flora of Natal. Memoirs of the Botanical Survey of South Africa No. 39
  • GORDON-GRAY, K.D. 1995. Cyperaceae in Natal. Strelitzia 2
  • KUNTH, C.S. 1837. Enumeratio plantarum 2. J.G. Cotta, Stuttgart & Tübingen
  • LYE, K.A. 1971. The generic concept of Bulbostylis Kunth ex C.B.Cl. AETFAT Proceedings. Mitteilungen der Botanischen Staatssammlung München 10
  • LYE, K.A. 1995. Cyperaceae . Flora of Somalia 4
  • LYE, K.A. 1996. A new subspecies of Bulbostylis hispidula ( Cyperaceae ) from Somalia. Willdenowia 25
  • PODLECH, D. 1967. Cyperaceae . Prodromus einer Flora von Südwestafrika 165
  • SCHONLAND, S. 1922. Introduction to South African Cyperaceae . Memoirs of the Botanical Survey of South Africa No. 3