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Nota sobre a presen a de uma espécie adventícia de Senecio (Asteraceae) no Rio Grande do Sul, BrasilKeywords: Asteraceae , Senecio , adventitious species , flora of Rio Grande do Sul Abstract: Senecio madagascariensis Poir. is reported for the first time as an adventitious species in the process of getting naturalized in the Rio Grande do Sul state, Brazil. Description, illustrations and observations about this species are presented.
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