Thursday night, at Christ and St. Stephen’s Church, an under-appreciated American composer gets his due with a tribute concert from the Bay Area’s formidable Cypress String Quartet. Recently deceased in 2010, Benjamin Lees was raised in San Francisco and wrote extensively in the ‘50s and ‘60s. He rejected the compositional fashions of the day, eschewing atonalism and Aaron Copland’s Americana for an expressive style sometimes compared to Bartok. The Cypress Quartet has long been a champion of Lees’ work, recording three of his string quartets in 2009 for Naxos. This fourth movement of his String Quartet #5, “Explosive,” earns its name with a non-stop barrage of rapid-fire notes in the exposition, serving as a perfect vehicle for showing off the Cypress String Quartet’s technical dexterity. Thursday’s program includes two of Lees’ String Quartets in full, as well as a number of solo piano and violin pieces.