You can paint, draw, photograph or just observe artists as they interpret the beauty of flowers through art during Plein Air Day from 10 a.m. to 4 p.m. Saturday, July 9 at Mischler’s Florist and Greenhouses, 118 South Forest Rd., Williamsville. The event is free and no registration is necessary. “En plein air” is a French expression that means “in the open air” and is used to describe the act of painting outdoors. Artists can set up their easels and…