 Within the families Velloziaceae and Eriocaulaceae around 70% of all species are endemic to the "campo rupestre"; a number that possibly has grown over the past 20 years since it was last investigated.High levels of endemism can also be identified by beta diversity analyses, which measure differentiation levels between two areas.A study conducted across three different ironstone sites (itabirite) in the "campo rupestre" identified the proportion of shared lineages as less than 5%, demonstrating a high level of beta diversity among the sites.