Baccharis sect. caulopterae (asteraceae, astereae) in rio grande do sul state, Brazil

Abstract

A study of the taxonomic diversity of Baccharis sect. Caulopterae DC. in Rio Grande do Sul State, Brazil, is presented. Three lectotypes were chosen and seven new synonyms were proposed. Twenty two species within the section were recognized, two of them are new records to the state flora. Key and morphological descriptions of the species are presented. Additionally, illustrations and data concerning to geographic distribution and ecological observations of the species in Rio Grande do Sul are discussed, including comments about morphological and taxonomic similarities.