What are the evolutionary connections between the montane vegetation of the campos rupestres and its surrounding lowland biomes, and which environmental factors drive this connectivity?

What are the patterns of pollen disparity in the Mimosa and Stryphnodendron clades, and are these patterns similar between lineages that occur in the same biomes?

What is the phylogenetic distribution of pollen characters in the Stryphnodendron clade, and does this distribution support the recent taxonomic rearrangements of its members?

Does our expanded sampling improve the current understanding of pollen disparity within the genus Mimosa, and clarify how morphological diversity is distributed across its phylogeny?