Georgia O'keeffe (Sun Prairie, 1887 - Santa Fe, 1986) was an american artist, most known for her floral paintings.
Explanation:
Her common themes are flowers and nature. Many times her work was interpreted to have a sexual connotation, since the flowers she painted were similiar to women genitals, but she has denied this in several ocations. Her husband Alfred Stieglitz was and art dealer and photographer, who took explicit and sensual photos of her which were thought to be the inspiration for her works as well. She also painted New York skyscrapers, and New Mexico landscapes.
The particular piece of music is the third piece in the composers 20th collection of works. That can included all kinds of things like symphony's operas among others.