What was Georgia O'Keeffe's 1916 painting of an abstract red-and-black form called?

Georgia O'Keeffe's 1916 abstract red-and-black painting was called No. 20—Special.

The work belongs to the group of radical charcoal and watercolor abstractions O'Keeffe made during 1915 and 1916. These images reduced natural forms to sweeping lines, curves, and concentrated areas of color.

Alfred Stieglitz exhibited several of the 1915 abstractions at his New York gallery, 291, without O'Keeffe's prior knowledge. That exhibition helped bring her work to the attention of the New York art world and established her as an important American modernist.

No. 20—Special is often confused with her later flower paintings because both rely on enlarged, simplified forms. Its title and date place it among her early nonrepresentational experiments.