Which 1926 painting by Georgia O'Keeffe features a close-up black iris?

Georgia O'Keeffe's 1926 painting featuring a close-up black iris is titled Black Iris.

The painting magnifies the flower so that its dark petals and central forms dominate the picture surface. O'Keeffe's flower paintings are known for this enlarged scale, which turns a familiar natural subject into an abstract-looking arrangement of curves, folds, and color.

Black Iris belongs to O'Keeffe's New York-era flower work, before her permanent move to New Mexico. Its subject is often discussed in relation to debates about whether her flowers should be interpreted symbolically or simply as close studies of natural form.

The title is sometimes confused with other iris paintings by O'Keeffe, including Black Iris III. Those works are related but are not the same object. The 1926 painting is generally identified simply as Black Iris.