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

Asteraceae - Helenieae - *Schkuhria Roth

Description :

  • Annual herbs, much branched, usually sparsely glandular-pubescent
  • Leaves alternate or opposite below, sessile, dissected or rarely simple, segments narrow, margin entire
  • Capitula radiate or discoid, several-flowered, on long peduncles, terminal and axillary, often corymbosely arranged
  • Involucre turbinate or campanulate; bracts in 1-3 rows
  • Receptacle epaleate
  • Ray florets , when present, female, fertile; corolla yellow, strap-shaped
  • Style branches linear, obtuse
  • Disc florets bisexual, fertile; corolla yellow or tinged reddish, tubular below, campanulate above, 5-toothed
  • Anthers with bases and apical appendage both obtuse
  • Style branches linear, apex rotundate-truncate or shortly appendaged, papillose outside, at least near tips
  • Cypselas narrowly obpyramidal, usually 4-angled, glabrous or pubescent
  • Pappus of 8-10 scales, with prominent midrib sometimes excurrent as awn
  • x = 10 (8, 11, 12) (polyploidy, B-chromosomes - 1 report)

Nomenclature:

  • *Schkuhria Roth
    • Roth: 116 (1797)
    • Heiser: 267 (1945)
    • Phillips: 820 (1951)
    • Hilliard: 326 (1977)
    • Karis & Ryding: 540 (1994)

Distribution & Notes:

  • Global : Species 6, North and South America
  • Southern Africa : Species 1: * Schkuhria pinnata (Lam.) Thell., naturalised and a widespread weed of disturbed areas

References:

  • HEISER, C.B. 1945. A revision of the genus Schkuhria . Annals of the Missouri Botanical Garden 32
  • HILLIARD, O.M. 1977. Compositae in Natal . University of Natal Press, Pietermaritzburg
  • KARIS, P.O. & RYDING, O. 1994. Tribes Helenieae and Heliantheae . In K. Bremer, Asteraceae , cladistics and classification . Timber Press, Portland, Oregon
  • PHILLIPS, E.P. 1951. The genera of South African flowering plants, edn 2. Memoirs of the Botanical Survey of South Africa No. 25
  • ROTH, A.W. 1797. Catalecta botanica 1. I.G. Müller, Leipzig

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