Myra Morris was born in Boort in the Victorian Mallee country, one of a large family, and was educated at the Brigidine Convent, Rochester. She spent most of her life in small Victorian country towns, and these form the backdrop to much of her fiction. She began publishing poetry during WWI, and produced England and Other Verses in 1918. Her early work tended towards the patriotic and pastoral. A prolific author, she contributed poetry, serials and short stories, including children's fiction, to many Australian publications, notably The Bulletin and The Australian Woman's Mirror. Her own publications included volumes of verse, novels, and short stories. Her work is included in the anthologies, At Home and Next Door: Australian and New Zealand Stories (1955) and The Little Track and Other Verses (1922), and some of her poems have been set to music. A selection of her prose appeared in The Township (1947). She wrote the introduction to Selected Poems of Capel Boake (1949); Capel Boake was the pseudonym of Morris' best friend Doris Kerr.
Myra Morris also wrote Australian Landscape (1944). She studied art for two years under Alexander Colquhoun and was a gifted woodcarver.