Did Georgia O'Keeffe paint abstract

I assume you know what abstract means. It means having no subject. Georgia O'Keeffe painted very many close-ups of flowers. The effect was often close to abstract, but still depicting a flower in an unusual perspective. Her pictures usually have titles telling you the subject. Then they cannot be abstract. In her very young days she did paint abstract paintings, called e.g. Music Red and Blue. This means they do not depict real things.