Cotton flower, Charles T. Bryson*, IPM Images; Soybean flower, Glen Hartman, National Soybean Research Laboratory; Corn ear, ISU Photo Service, Iowa State University of Science and Technology, © 1992; Arabidopsis thaliana flower, Elliot Meyerowitz, California Institute of Technology; Wheat ear (antithesis stage), Wikipedia; Rice flower, Nori Kurata, National Institute of Genetics (Japan), Oryzabase; Poplar flower, Virginia Tech Forestry Department © 2003, Wheat spiklet, Wikipedia; Poplar flower, Bill Cook, Forestry Images; Arabidopsis thaliana flower, Peggy Greb*; Sunflowers, Edward McCain*; Foxtail Barley flower, Klen Gray, Oregon State University photo collection; Potato flower, Keith Weller*; Flowering alfalfa, Keith Weller*

*USDA/ARS