Michalet & al. Rainfall continentality, via the winter GAMS angle, provides a new dimension to biogeographical distributions in the Western United States Dataset 1 : VEG.csv is a floristic table including 467 sites x 132 species and contains presence/absence data. Dataset 2 : ENV.csv is an environmental table including 467 sites x 5 variables. GAMSw2 is the winter (December, January and February) GAMS angle PRECw is winter (December, January and February) precipitation TMIN is the minimum temperature of the coldest month GSL5 is the number of days with a mean temperature above 5°C ARIs is the ratio between the precipitation and the mean of maximum temperatures of the three summer mmonths (June, July and August) Dataset 3 : PLOTS.csv is a table of metadata for the 467 sites including state, latitude (in decimal degree, WGS84), longitude (in decimal degree, WGS84) and elevation (in m)