Oriastrum is a genus of plants in the family Asteraceae, found in western South America (northwest Argentina, Bolivia, Chile, and Peru).Poeppig, Eduard Friedrich. 1843. Nova genera ac species plantarum, quas in regno Chilensi Peruviano et in terra Amazonica 3: 50-51 in LatinPoeppig, Eduard Friedrich. 1843. Nova genera ac species plantarum, quas in regno Chilensi Peruviano et in terra Amazonica 3: plate CCLVII (257) color illustration and line drawingsTropicos, Oriastrum Poepp. It is placed in the tribe Mutisieae.
Species , Plants of the World Online accepted the following species: Oriastrum acerosum (J.Rémy) Phil. Oriastrum achenohirsutum (Tombesi) A.M.R.Davies Oriastrum apiculatum (J.Rémy) A.M.R.Davies Oriastrum dioicum (J.Rémy) Phil. Oriastrum famatinae A.M.R.Davies Oriastrum gnaphalioides Wedd. Oriastrum lycopodioides Wedd. Oriastrum minutum (Phil.) Nicola, S.E.Freire & Ariza Oriastrum pentacaenoides Phil. Oriastrum polymallum Phil. Oriastrum pulvinatum Phil. Oriastrum pusillum Poepp. Oriastrum revolutum (Phil.) A.M.R.Davies Oriastrum stuebelii (Hieron.) A.M.R.Davies Oriastrum tarapacensis A.M.R.Davies Oriastrum tontalensis A.M.R.Davies Oriastrum werdermannii A.M.R.Davies
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