Acmella decumbens (Sm.) R.K.Jansen
  • Syst. Bot. Monogr. 8


Cite taxon page as 'WFO (2021): Acmella decumbens (Sm.) R.K.Jansen. Published on the Internet;http://www.worldfloraonline.org/taxon/wfo-0000022226. Accessed on: 23 Oct 2021'

Morphology

Annual herb branching from the base, stems decumbent, rooting at the nodes, then erect, up to c. 0.5 m, leafy. Leaves opposite, nearly or quite glabrous, up to 5 x 0.8 cm, often much narrower, linear to lanceolate, tapering at the base into a petiole up to 1 cm long, margins entire or subserrate. Heads terminal, solitary, on peduncles up to 20 cm long. Involucral bracts in 2 series, ovate, c. 4 mm long, sub-equal. Receptacle conical, c. 0.8 cm across the base, 1 cm high in fruit. Rays c. 8, limb narrow, up to c. 1 cm long, yellow, disc yellow. Disc achenes 3 mm long, elliptic in outline, compressed, apex truncate with 2 minute raised shoulders each crowned with a short pappus bristle, margins silky-ciliate; ray achenes mostly trigonous with 3 pappus bristles, otherwise similar to the disc.

  • Provided by: [C].e-Flora of South Africa
    • Source: [
    • 1
    • ]. 

    Habitat

    In Natal, forms extensive colonies on roadsides in the Midlands and parts of Zululand.

  • Provided by: [C].e-Flora of South Africa
    • Source: [
    • 1
    • ]. 

    Distribution

    A native of Uruguay, adventive in South Africa, where it was first recorded at East London in 1926, then in Natal (Pietermaritzburg) in 1947.

  • Provided by: [C].e-Flora of South Africa
    • Source: [
    • 1
    • ]. 

    Distribution Map

     
    • Native distribution
    Found in
    • Southern America Brazil Rio Grande do Norte
    • Paraní
    • Rio Grande do Sul
    • Santa Catarina
    • Minas Gerais
    • São Paulo
    • Mato Grosso do Sul

      Bibliography

    • 1 Hilliard, OM. 1977. Compositae in Natal. Univ. Natal, Pietermaritzburg.
    • 2 Syst. Bot. Monogr. 8

     Information From

    Brazilian Flora 2020 project - Projeto Flora do Brasil 2020
    http://floradobrasil.jbrj.gov.br
    Brazil Flora G (2014): Brazilian Flora 2020 project - Projeto Flora do Brasil 2020. v393.147. Instituto de Pesquisas Jardim Botanico do Rio de Janeiro. Dataset/Checklist. doi:10.15468/1mtkaw
    • A Group Brazil Flora, REFLORA Program
    Compositae
    CC0 1.0 Universal (CC0 1.0). https://creativecommons.org/publicdomain/zero/1.0
    • B CC0 1.0 Universal (CC0 1.0).
    e-Flora of South Africa
    e-Flora of South Africa. v1.21. 2018. South African National Biodiversity Institute. http://ipt.sanbi.org.za/iptsanbi/resource?r=flora_descriptions&v=1.21
    • C All Rights Reserved
    World Flora Online consortium
    http://www.worldfloraonline.org/organisation/WFO
    World Flora Online Data. 2018.
    • D CC0 1.0 Universal (CC0 1.0).