The tribe Dalbergieae s.l. (Leguminosae-Papilionoideae) in the municipality of Caetité, Bahia, Brazil

Abstract Dalbergieae s.l. owns 49 genera and 1,324 species distributed mainly in Neotropics. In Brazil is represented by approximately 380 species and 18 genera. Studies floristic/taxonomic about the Dalbergieae in Brazil are punctual, the knowledge about their diversity is still fragmented or is out-of-date. With respect to the Caetité, these studies are still non-existent. This work had as objective to carry out a study of the taxonomic species of Dalbergieae occurring in Caetité, giving identification key, descriptions, illustrations for most of them and comments on the distribution geographical and affinities taxonomic of the species. Have been recorded 30 species distributed in 12 genera. Stylosanthes (6 spp.), Dalbergia (5) e Machaerium (5) were the genera most representative. Nissolia tomentosa is being registered for the first time to Bahia in this study. Pterocarpus zehntneri, considered to be a kind of distribution that is uncertain in the state of Bahia, was recoletada after 105 years. The taxa have been observed in all types vegetational, having prevalence greater in areas of the shrubby Caatinga and of the Cerrado s.s. Characteristics of the leaves, inflorescence, color of petals, and type of fruit were the characters most relevant to the identification of the taxa.摘要：广义黄檀族（Dalbergieae s.l.）包含49个属、1324个物种，主要分布于新热带区（Neotropics）。该族在巴西约有380种、18个属。针对巴西广义黄檀族的区系与分类学研究仍较为零星，学界对其物种多样性的认知仍较为碎片化且部分内容过时；而针对卡埃蒂特（Caetité）地区的相关研究则完全空白。本研究旨在对卡埃蒂特地区分布的广义黄檀族物种开展分类学研究，为多数类群提供分种检索表、形态描述与插图，并探讨各物种的地理分布及分类亲缘关系。本研究共记录到12个属的30个物种，其中柱花草属（Stylosanthes，6种）、黄檀属（Dalbergia，5种）与剑叶豆属（Machaerium，5种）为该区域物种组成最丰富的三个属。本研究首次将绒毛尼索利亚（Nissolia tomentosa）记录于巴伊亚州（Bahia）；曾被认为在巴伊亚州分布不确定的曾氏紫檀（Pterocarpus zehntneri）在时隔105年后被重新采集到。该族类群分布于所有植被类型中，其中以灌丛状卡廷加（Caatinga）植被与狭义塞拉多（Cerrado s.s.）植被区域的占比最高。叶片特征、花序结构、花瓣颜色以及果实类型是该类群鉴定中最具参考价值的形态指标。