e-Key <span id="jodit_selection_marker_1707208999466_311062790995996" data-jodit_selection_marker="start" style="line-height: 0; display: none;"></span>v3 - Blainv<span id="jodit_selection_marker_1707208999466_19653469826635783" data-jodit_selection_marker="end" style="line-height: 0; display: none;"></span>illea
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Interactive keys to the identification of seed plants of southern Africa using keys based on plant morphology.

Asteraceae - Heliantheae - Blainvillea Cass.

Description:

  • Perennial herbs with striate, glabrescent branches
  • Leaves opposite, shortly petiolate, elliptic to lanceolate, entire or remotely toothed, scantily pubescent
  • Capitula radiate or almost disciform, few-flowered, in lax cymose panicles, often solitary in forks of inflorescence branches
  • Involucre campanulate or subglobse; bracts in 2-5 rows
  • Receptacle somewhat convex, paleate; paleae as long as florets, membranous, irregularly toothed above
  • Ray florets female, fertile; corolla white; tube cylindric with short, obovate, shortly bifid lamina
  • Style terete; branches linear, obtuse
  • Cypselas 2- or 3-angled, dorsiventrally compressed
  • Pappus of 3 barbellate awns
  • Disc florets bisexual, fertile; corolla white; tube cylindric, campanulate above, shortly 5-lobed
  • Anthers faintly eared at base; apical appendage ovate
  • Style terete, base swollen; branches linear, obtuse
  • Cypselas oblong 2-4-angled, usually laterally compressed
  • Pappus of 2 barbellate awns or unequal, shortly connate scales
  • x = 17 (8, 9) (polyploidy)

Nomenclature:

  • Blainvillea Cass.
    • Cassini: 493 (1823)
    • Candolle: 492 (1836)
    • Bentham: 369 (1873)
    • Oliver & Hiern: 374 (1877)
    • Phillips: 815 (1951)
    • Wild: 38 (1967)
    • Karis & Ryding: 589 (1994)

Distribution & Notes:

  • Global: Species 10, pantropical
  • Southern Africa: Species 1: Blainvillea gayana Cass., N Botswana and Northern Province

References:

  • BENTHAM, G. 1873. Compositae. In G. Bentham & J.D. Hooker, Genera Plantarum 2. Lovell Reeve & Co., London
  • CANDOLLE, A.P. DE. 1836. Compositae. Prodromus 5. Treuttel & Würtz, Paris
  • CASSINI. A.H.G. DE. 1823. Dictionnaire des sciences naturelles 29. Ed. F. Cuvier. edn 2. Le Normant, Paris
  • KARIS, P.O. & RYDING, O. 1994. Tribes Helenieae and Heliantheae. In K. Bremer, Asteraceae, cladistics and classification. Timber Press, Portland, Oregon
  • OLIVER, D & HIERN, W.P. 1877. Compositae. Flora of tropical Africa 3
  • PHILLIPS, E.P. 1951. The genera of South African flowering plants, edn 2. Memoirs of the Botanical Survey of South Africa No. 25
  • WILD, H. 1967. The Compositae of the Flora zambesiaca area, 1. Kirkia 6

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