Items from the U-M Museum of Art's (UMMA) "Nature Transformed: Wood Art from the Bohlen Collection" exhibit: 'A Tree Runs Through It' by Ronald Gerton (above left), and an unit led work by Ray Allen made of mesquite, satinwood and bloodwood. The collection, showing through Oct. 3 in the museum's Twentieth-Century Gallery, contains more than 70 wood pieces donated to UMMA in 2002 by Robert Bohlen and Lillian Montalto Bohlen. (Courtesy Museum of Art)