Leaves of Bluegrass,” the Chester River Chorale’s 19th annual spring concert, salutes American poets like Walt Whitman and Langston Hughes and presents the Eastern Shore premier of Mortals and Angels, a cantata-length Te Deum written in bluegrass style and backed by the High and Wides string bluegrass band. The performances by the 95-voice chorus are at 7:30 p.m. Thursday and Friday, April 12th and 13th, at the Chestertown Baptist Church on Morgnec Road. http://chesterriverchorale.org