Simkin et al. 2016 PNAS data on herbaceous species richness and associated plot and covariate information
This dataset includes the geographic location (lat/lon) for 15,136 plots, as well as the herbaceous species richness, climate, soil pH, and other variables related to the plots. 

This dataset is associated with the following publication:
Simkin, S., C. Clark , W. Bowman, E. Allen, J. Belnap, and L. Pardo. Conditional …