What flower appears in Georgia O'Keeffe's famous 1927 painting Jimson Weed?

The flower in Georgia O'Keeffe's 1927 painting Jimson Weed is jimson weed.

The painting presents a single large white jimson weed blossom against a pale background. O'Keeffe enlarged flowers so viewers had to look closely at their shapes, folds, and tonal changes.

Jimson weed is also known as Datura or moonflower, although the painting's title identifies the subject specifically as jimson weed. The plant is toxic, so it should not be treated as an edible flower.

The work became exceptionally valuable at auction. In 2014, it sold for $44.4 million, then a record price for a painting by a female artist at auction.