Guynesomia is a genus of Chilean flowering plants in the tribe Astereae within the family Asteraceae.Bonifacino, Mauricio & Sancho, Gisela. 2004. Taxon 53(3): 675–678, figures 1–3, 4 [map].Tropicos, Guynesomia Bonif. & G. Sancho

The genus is named in honor of US botanist Guy L. Nesom.

SpeciesThe Plant List, Guynesomia scoparia (Phil.) Bonif. & G.Sancho The only known species is Guynesomia scoparia, native to the Coquimbo Region in Chile.Zuloaga, F. O., O. Morrone, M. J. Belgrano, C. Marticorena & E. Marchesi. (eds.) 2008. Catálogo de las plantas vasculares del Cono Sur. Monographs in systematic botany from the Missouri Botanical Garden 107(1–3): i–xcvi, 1–3348

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