News Plants City life changes style of weed seeds By Susan Milius March 10, 2008 at 2:29 pm - More than 2 years ago Share this:Share Share via email (Opens in new window) Email Click to share on Facebook (Opens in new window) Facebook Click to share on Reddit (Opens in new window) Reddit Click to share on X (Opens in new window) X Click to print (Opens in new window) Print Urban living quickly drives a species of little yellow flower to make seeds that end up living with mom, say researchers in France. URBANITE. Crepis sancta flowers pop up along urban sidewalks in Europe, where the pressures of city living bring rapid changes in seed formation. G.