Florine Stettheimer (August 19, 1871-May 11, 1944) was an American modernist painter, feminist, theatrical designer, poet, and salonnière.
Biography on Wikipedia: https://en.wikipedia.org/wiki/Florine_Stettheimer
Portrait of Alfred Stieglitz by Florine Stettheimer
1928 / Oil on canvas / 38″ 26-1/4″ / Alfred Stieglitz Collection, Co-owned by Fisk University, Nashville, Tennessee, and Crystal Bridges Museum of American Art, Bentonville, Arkansas
Florine Stettheimer on MoMA: https://mo.ma/3k2b6n3