Miriam Gordon Landrum, pianist, was born in Waco on November 25, 1893. She was the daughter of Sam Houston and Mary Cutler (Dickey) Landrum and sister of Lynn Landrum. Both of Miriam's parents were painters. She attended public schools in Altus, Oklahoma, received a diploma from Kingfisher College in 1915, and attended the University of Texas in 1916–17. She studied piano with Gertrude Concannon, Charles Haubiel, Rudolph Ganz, and Frederic Emerson Farrar. In addition, she studied with Isidore Philippe in Paris and with Robert Casadesus at the American Conservatory at Fontainebleau, France. She also coached with Edwin Hughes and E. Robert Schmitt.
Landrum taught piano at Kingfisher College, at Radnor College in Nashville, Tennessee (1911–12), and at the University of Texas (1922–25). She cofounded the Austin chapter of the Music Teachers' Association in 1930 and helped to establish the Texas School of Fine Arts, which she jointly directed with Anita Gaedke. In 1942 she became sole owner and director of the school, a position she held until her death. She was a charter member of the National Guild of Piano Teachers and served as a member of its board of trustees. She wrote numerous educational articles and gave lecture recitals on piano literature and technique. She was active in many religious and cultural activities, including the founding of the Austin Symphony Orchestra.
Her skill as a teacher was reflected in the success of her pupils, many of whom won high ratings and first places in auditions sponsored by the National Guild of Piano Teachers. Landrum was elected Music Teacher of the Year by the Austin District Music Teachers' Association in 1962. She was a faculty member of the American College of Musicians and a member of the Austin and Texas chapters of the Music Teachers' Association, the National Guild of Piano Teachers, and the Mu Phi Epsilon, Delta Kappa Gamma, and Delta Zeta sororities. She was also a member of the Daughters of the American Revolution and the Albert Sidney Johnston chapter of the United Daughters of the Confederacy. Her hobbies included Bible archeology and genealogy. She died in Austin on January 2, 1967, and was buried in Whitewright, Texas.