This file includes all original data related to the analysis published by the American Journal of Botany including: 1) The original radomized block design, 2) the rearranged split-plot block design, 3) the population code as it appears in the manuscript, 4) a genotype number, 5) the watering treatment (D=dry; W = wet), 6) Biome (P=prairie, F=forest), 7) latitude and longitude of wild population, 8) flow cytometry peaks and pg DNA calculation, 9) original rhizome weight at planting, and for each year 2007-2010 when measured, 10) date of first flower, 11) leaf number, 12) height, 13) basal stem diameter, 14) abaxial and adaxial stomatal counts and their ratio, 15) clone number, 16) branch number 17) dried biomass. Herbivory (yes/no) for 2008 is also included.