While the woodland wildflowers of Spring tend to attract more attention, the summer prairie wildflowers are much showier. Butterfly Milkweed (Asclepias tuberosa) is one of my favorites. Its striking orange flowers stand out among the numerous yellow blooms of the tallgrass prairie. It blooms for weeks and, as its name suggests, attracts butterflies. While the nectar feeds the adult butterflies, the plant itself is a good food source for Monarch caterpillars.
I teach economics at Kalamazoo College. My wife is also an economist. We were on sabbatical in Europe for the 2014-15 academic year. (Salamanca, Spain, followed by Oxford, UK.) We were in Uruguay for the 2006-7 academic year.