Mid-summer is peak time for prairie flowers and Cup Plant (Silphium perfoliatum) is one of the most impressive. Clusters of large yellow flowers top stems that can be over 6 feet tall. The height and its unusual leaves distinguish it from other tallgrass wildflowers. The opposite leaves meet at the stem, forming a cup. This morning there was enough dew to fill it.
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.