Rattlesnake Master (Eryngium yuccifolium) is a striking plant of tallgrass prairie. The spiky flowerheads hold their distinct shape after the blossoms dry. In Michigan, it is protected as a threatened species.
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.