This is so cool. Years ago, I heard about a couple of artists who were using grass as a canvas, shining lights on them through negatives. Now, here they are:

"We are exploring the capacity of grass to record complex photographic images through the production of chlorophyll. The equivalent of the tonal range in a black-and-white photograph is produced in the yellow and green shades of living grass. Although these organic "photographs" are exhibited in a fresh state for a short time, excessive light or lack of it eventually corrupts the visibility of the image."

Very cool, neo-biological in a whole new way.

Perhaps best viewed while listening to tunes on your flower speakers.