The NSR evaluates a species native status with the political unit of observation based on the following sources:

Source	Source name	Source URL or contact	Date accessed
conosur	Catálogo de las plantas vasculares del Cono Sur (Argentina, Sur de Brasil, Chile, Paraguay y Uruguay)	http://www.darwin.edu.ar/Proyectos/FloraArgentina/fa.htm	2017-09-12
enquist	Miscellaneous Old World endemic families, genera and species	Brian Enquist (benquist@email.arizona.edu)	2014-07-30
flbr	Brazilian Flora 2020 project	http://ipt.jbrj.gov.br/jbrj/resource?r=lista_especies_flora_brasil#downloads	2017-11-27
fwi	Flora of the West Indies	http://botany.si.edu/antilles/westindies/	2015-09-16
ipane	Invasive Plant Atlas of New England	http://www.eddmaps.org/ipane/index.html	2014-03-10
mab	Endemic genera and families from Mabberley		2017-09-05
mexico	Checklist of the native vascular plants of Mexico	http://www.sciencedirect.com/science/article/pii/S1870345316300707	2017-08-28
tropicos	Missouri Botanical Gardens country checklists	www.http://services.tropicos.org/	2014-03-10
usda	USDA Plants Database	http://plants.usda.gov/adv_search.html	2014-03-10
vascan	Database of Vascular Plants of Canada	http://www.canadensys.net/activities/development/vascan	2014-03-10
weakley	Exotics from Alan Weakley Flora of E. North America	http://www.herbarium.unc.edu/flora.htm	2014-07-30