Data set 2.

Column label	Column description
Family	The full scientific name of the family in which the taxon is classified
Species	The full scientific name
Author	Authorship of the scientific name
Origin	If the species is native or non-native, followed Flora do Brasil 2020 (under construction; http://floradobrasil.jbrj.gov.br)
Threatened category	Followed Centro Nacional de Conservação da Flora (http://www.cncflora.jbrj.gov.br/portal); DD = Data deficient, NT = Near Threatened, VU = Vulnerable, CR = Critically Endangered, EN = Endangered, LC = Least Concern, NE = Not evaluated
Life form	Followed Flora do Brasil 2020 (under construction; http://floradobrasil.jbrj.gov.br); life forms are classified into six categories: herbs, lianas/vines, palm trees, shrubs, sub-shrubs and trees
Source	Indicates where we achieved the information that the species is occurring on lowland inselbergs
Habitat	Indicates if the species occurred in vegetation islands (VI; ellipsoid vegetation patches surrounded by bare rock) and scrub (S; arboreal-shrub vegetation bordering inselberg)
Reference or voucher	Indicates vouchers (collector and number) with the respective acronym of the herbarium according to Thiers (http://sweetgum.nybg.org/ih/, continuously updated) when the source is C or EC; in case the source is A, it was provided by the reference of the article (see references at the end of the table)
Link for the voucher	Provides the link for the online image of the respective voucher; links are from JABOT-JBRJ and Reflora-Herbário Virtual