This spreadsheet contains data on the phenology (timing) and abundance of flowering by wildflowers in 30 2x2m plots at the Rocky Mountain Biological Laboratory, from an NSF-funded research project conducted by Dr. David W. Inouye and collaborators. Metadata for this project are also available on DRUM. NOTE ADDED APRIL 2017: There is now a (slightly) corrected version of this dataset, which also includes data through 2016, assembled primarily by Dr. Jane Ogilvie and Dr. Amy Iler, through support from the National Science Foundation's program "Long-term Research in Environmental Biology". It is archived on the Open Science Framework, at https://osf.io/jt4n5/. The site includes a link to a data use policy document, which we ask users to fill out and submit so we can track use of the data and help to prevent duplication of analyses.