The artist wanted people to take more time in appreciating beautiful natural sights, such as the White Rose found here. A more abstract approach was typical of Georgia O'Keeffe's modernist principles. White flowers were also a frequent choice for her and photography will have taught her of the merits of reducing a colour pallette, as the likes of Ansel Adams had discovered.
It took so time for Georgia to build the confidence and backing to work on huge mural-sized depictions, and White Rose Abstraction was one of the first of these. The larger formats were ideal for maximising the detail of the flower that the artist could communicate to the viewer.