Asteraceae no Município de Mucugê, Chapada Diamantina, Bahia, Brasil

Resumo Levantamentos floristicos de Asteraceae na Cadeia do Espinhaco tem confirmado uma significante riqueza de especies e de endemismos dessa familia para as vegetacoes campestres. O presente trabalho tem como objetivo realizar um inventario floristico de Asteraceae no municipio de Mucuge, Bahia, oferecendo subsidios para o reconhecimento da familia na regiao. As coletas tem sido realizadas na regiao ha pelo menos uma decada e meia cobrindo grande parte da area do Municipio. Foram estudados tambem os materiais provenientes dos herbarios ALCB, CEPEC, HRB, HUEFS, MBM, NYBG, RB, SP, SPF e UB. A familia Asteraceae esta representada em Mucuge por 18 tribos, 78 generos e 167 especies. As tribos com maior numero de especies sao Eupatorieae (49 spp.), Vernonieae (46 spp.), Astereae (18 spp.) e Heliantheae (11 spp.). Dos generos registrados, cinco sao monoespecificos (Pseudostifftia, Platypodanthera, Bahianthus, Conocliniopsis e Prolobus) e cinco sao endemicos da Bahia (Pseudostifftia, Stylotrichium, Lasiolaena e Semiria). Dentre os generos com maior riqueza, destacam-se Baccharis (17 spp.), Lychnophora (11 spp.), Mikania (10 spp.), Lepidaploa e Lessingianthus (7 spp.) cada. Sao apresentadas chaves de identificacao para as tribos, generos e especies, comentarios taxonomicos e distribuicao geografica para cada taxon, alem de ilustracoes e fotos. Palavras-chave: Cadeia do Espinhaco, campo rupestre, floristica, endemismo. Abstract Floristic surveys of the Asteraceae in the Espinhaco Range have showed a significant species richness and endemisms in this family for the grassland vegetation. Thus, this study aims to survey the floristic inventory of the Asteraceae in the municipality of Mucuge, Bahia, providing subsidies for an updated taxonomic recognition of the family in the region. Field collections have been conducted for at least a decade and a half covering much of the area. We also analyzed the material from the herbaria ALCB, CEPEC, HRB, HUEFS, MBM, NYBG, RB, SP, SPF and UB. Asteraceae is represented in Mucuge by 18 tribes, 78 genera and 167 species. The tribes with the greatest number of species are Eupatorieae (49 spp.), Vernonieae (46 spp.), Astereae (18 spp.) and Heliantheae (11 spp.). Five of the genera are monospecific (Pseudostifftia, Platypodanthera, Bahianthus, Conocliniopsis e Prolobus) and five are endemic to Bahia (Pseudostifftia, Stylotrichium, Lasiolaena and Semiria). The genera with highest number of species are Baccharis (17 spp.), Lychnophora (11 spp.), Mikania (10 spp.), Lepidaploa and Lessingianthus (7 spp.) each. Identification keys to the tribes, genera and species, followed by taxonomic comments and geographic distribution for each taxon, and illustrations and images are presented. Key words: Espinhaco Range, rocky field, floristic, endemism.