“Martha Rosler: Passionate Signals”: Photographs and videos of flowers and gardens are not what one expects of Rosler, whose collages of war scenes spliced into tidy American kitchens were some of the most searing of the Vietnam era. But Rosler is never not being critical, she just has a better knack than most for seeing through the veneer of our comfort and beauty. Sept. 17-Jan. 31, Neubauer Collegium for Culture and Society, 5701 S. Woodlawn Ave., 773-702-6030, neubauercollegium.uchicago.edu/exhibitions