Holiday Leaves -- Image credit: Bi-Huei Hou, Carnegie Institution for Science, Department of Plant Biology

This image was selected as our holiday card for 2013. The “Holiday Leaves” are images of lavender leaves excited by ultraviolet or white light and observed through different colored filters. The “dots” are oil glands whose contents are made especially visible by their fluorescence. The images were taken during the Fascination of Plants Day, a program that celebrates plant science and is designed for 7th and 8th graders. It was held by the Carnegie Institution’s Department of Plant Biology in the summer of 2013.