When asked to describe her music, Portland’s Anne Weiss has one word: diverse. Weiss cites blues as one of her influences, along with contemporary folk, gospel, funk and rhythm and blues. She will join another Portland-based blues performer, Mary Flower, in a concert featuring a jumble of styles Saturday night at First Presbyterian Church in Roseburg. The show starts at 7:30 p.m. at 823 S.E. Lane Ave. Music took hold of Weiss early, she said, and she hasn’t stopped exploring the art since. “I was standing in my parents’ kitchen as a young kid, the radio was on, and I …