This file describes the contents of seven files related to the data and analysis of flowering phenology, spatial location, and seed set information taken on individual Echinacea angustifolia plants flowering an an experimental plot in Douglas County, Minnesota, USA during 2005 - 2007: flPhenology.xy.C1.2005.csv flPhenology.xy.C1.2006.csv flPhenology.xy.C1.2007.csv flPhenology.xy.C1.2005.r flPhenology.xy.C1.2006.r flPhenology.xy.C1.2007.r flPhenology.xy.C1.makeSixPanelFig.r The three data files are named flPhenology.xy.C1.2005.csv, flPhenology.xy.C1.2006.csv, and flPhenology.xy.C1.2007.csv. Each file contains information on all plants that flowered in the Echinacea Project main common garden experimental plot (C1) during the summers of 2005, 2006, and 2007, respectively. Each row corresponds to one flowering plant. Columns are separated by commas. Column Descriptions plt_id: Unique identifier for each flowering plant. x: X coordinate for plant in the plot (units = meters); corresponds to row or Easting coordinate. y: Y coordinate for plant in the plot (units = meters); corresponds to position or Northing coordinate. empty: Total number of achenes the plant produced that were not fertilized. Details about how this was estimated in each year are provided in the associated journal article. full: Total number of achenes the plant produced that were fertilized. Details about how this was estimated in each year are provided in the associated journal article. sd: First day the plant shed pollen (in day of year, January 1 = 1). ed: Last day the plant shed pollen (in day of year, January 1 = 1). avpeak_jd: Peak flowering date for the plant calculated as the mean date of flowering weighted by the number of florets with anthers shedding pollen on each flowering day (in day of year, January 1 = 1). mar_sync: Flowering synchrony of the plant compared to all flowering plants in the plot calculated using the equation in Table SI in Supporting Information. hd_ct: Count of flowering heads per plant. This information is only present in the 2005 dataset. NA is used to indicate missing data. Field data were collected by the authors and other members of Team Echinacea during each summer. Volunteers and interns at the Chicago Botanic Garden contributed to cleaning heads and assessing seed set in achenes. Analyses of these datasets were conducted using R. The script files are named flPhenology.xy.C1.2005.r, flPhenology.xy.C1.2006.r, and flPhenology.xy.C1.2007.r The six-panel figures in the associated journal article were generated using the R script file "flPhenology.xy.C1.makeSixPanelFig.r" which reads output from each of the three scripts above. Associated datasets and further information about this common garden experiment are available on the Echinacea Project website: http://echinaceaproject.org/ Contact Stuart Wagenius or Jennifer Ison with questions about this dataset: stuart.wagenius@gmail.com or echinaceaproject@gmail.com