Many of us are very reluctant to put together a flower arrangement. We see photos of complicated bouquets accompanied by complicated descriptions of color and texture and know we could never aspire to making such a thing. In her book Windowsill Art: Creating one-of-a-kind natural arrangements to celebrate the seasons (St. Lynn’s Press $18.95) Nancy Ross Hugo, shows us a way to make arrangements that are beautiful in their simplicity. I am a person who is known for…