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Centrosema montanum, a new species of Papilionoideae (Leguminosae) restricted to the Brazilian Atlantic Forest, is described, illustrated and compared to C. angustifolium, C. dasyanthum and C. pascuorum. The new species can be recognized by its pinnate leaves and lanceolate leaflets. The large flowers present pubescent calyx with linear lobes and emarginate stigmas. Additional comments about the geographic distribution, phenology, etymology, and taxonomy of C. montanum are provided. Due to its restricted area of occurrence which encompasses a fragmented landscape and poor habitat environmental quality, this species must be considered as Critically Endangered according to IUCN criteria.
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Pereira et al. (2026) studied this question.
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