Which 1926 Georgia O'Keeffe painting enlarges a dark iris flower?

Black Iris is the 1926 Georgia O'Keeffe painting that enlarges a dark iris flower.

O'Keeffe painted Black Iris during the period when she was becoming famous for close-up views of flowers. The flower fills much of the composition, encouraging viewers to focus on folds, curves, and tonal transitions rather than seeing the plant as a small botanical specimen.

The painting is frequently interpreted through ideas about abstraction and the body, although O'Keeffe rejected attempts to reduce her flower paintings to a single symbolic meaning. She emphasized that magnifying a flower could make people notice its details, since most viewers did not take time to look closely at one.

Several O'Keeffe flower titles are easily confused. Red Canna concerns a different flower, while Jimson Weed depicts a white datura blossom. Black Iris is specifically associated with the dark, centrally positioned iris form.