Lüdtke, R.; Aguiar, A. C. A. A note about the occurrence of reduced petals in species of Polygala L. subgenus Hebeclada (Chodat) Blake (Polygalaceae) from southern Brazil. Biota Neotrop., vol 8, no. 1, Jan./Mar. 2008. Available from:
This study used pollen morphology to address taxonomic controversies related to several species belonging to subgenus Hebeclada of the genus Polygala (Polygalaceae). According to the last traditionally accepted revision of this subgenus, it comprises 40 species. Nevertheless, a recent taxonomic treatment applying more comprehensive criteria reduced this number to only nine species. Our work focused on 15 traditionally accepted species that occur in Brazil, fourteen of which have been considered as only six species in this recent taxonomic study. Pollen grains from floral buds at pre-anthesis were collected from herbarium specimens and analysed using both visible light and scanning electron microscopy. Most of the traditionally accepted species were distinguished by different combinations of several pollen-related features, in particular colpi number (13 or 15), pollen size and shape, and endoaperture type (endocingulate or not) and arrangement (parallel or sinuous). The species accepted in the recent taxonomic treatment could not be discriminated by pollen characters.
RESUMO(Polygala fontellana Marques & Aguiar (Polygalaceae), uma nova espécie para o Brasil) Uma nova espécie de Polygalaceae é descrita para os estados da Bahia e Minas Gerais, até o momento endêmica da Cadeia do Espinhaço. Polygala fontellana Marques & Aguiar pertence ao subgênero Polygala por apresentar carena cristada. São fornecidos descrição, diagnose, ilustração e comentários sobre a sua distribuição geográfica, floração e frutificação. Palavras chave: taxonomia, campo rupestre, flora. ABSTRACT(Polygala fontellana Marques & Aguiar (Polygalaceae), a new species in Brazil) A new species of Polygalaceae is described from Bahia and Minas Gerais State, currently endemic to Cadeia do Espinhaço. Polygala fontellana Marques & Aguiar belongs to subgenus Polygala by keel cristate. Description, diagnoses, illustrations and comments about the geographic distribution, phenology are provided.
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