Stacy Rowles, a jazz trumpeter, fluegelhorn player and singer who had been active on the Los Angeles jazz scene since the 1980s, died on Oct. 27 at her home in Burbank, Calif. She was 54.

The cause was complications from a car accident on Oct. 13, said her sister, Stephanie Rowles.

The daughter of the jazz pianist and composer Jimmy Rowles, Ms. Rowles was perpetually under-discovered: better known in Europe than in America, and much better known on the West Coast than around New York. She played restful, melodic solos with a warm tone and sang in a wise, honest voice, shy but swinging.