A cob of dizzyingly technicolored corn shoots to the top of Felice Rix-Ueno’s textile design Feldfruchte: Steel with Indigo and Brown.  Sheaves of wheat and grains float around the bright maize.  As summer draws to a close, few foods resonate more than corn, sweet and sun-ripened in the hazy days of August. Rix-Ueno’s title draws...