Alma Thomas
(1891 - 1978)
 

Alma Woodsey Thomas was an African-American artist and teacher who lived and worked in Washington, D.C., and is now recognized as a major American painter of the 20th century. Thomas is best known for the "exuberant", colorful, abstract paintings that she created after her retirement from a 35-year career teaching art at Washington's Shaw Junior High School.

https://en.wikipedia.org/wiki/Alma_Thomas

Red Rose Cantata
1973
acrylic on canvas
175.3 x 127 cm
National Gallery of Art, Washington
https://www.nga.gov/collection/art-object-page.55740.html