What subject dominates Georgia O'Keeffe's 1915 series of charcoal drawings?

Abstract forms dominate Georgia O'Keeffe’s 1915 series of charcoal drawings. These works marked a decisive break from the academic realism she had been taught and helped establish her as an important early American abstractionist.

O'Keeffe made the drawings while teaching in South Carolina and later sent them to her friend Anita Pollitzer. Pollitzer showed them to Alfred Stieglitz, who exhibited some at his New York gallery in 1916. The drawings used sweeping lines and simplified shapes rather than recognizable scenes.

O'Keeffe did not usually treat abstraction as a puzzle with one fixed meaning. She wanted visual forms to communicate directly, and she later returned to recognizable flowers, landscapes, bones, and buildings while retaining an abstracting approach. This is why calling her only a flower painter misses a crucial part of her career.