Which flower did Georgia O'Keeffe paint in her famous 1932 close-up work?

Georgia O'Keeffe painted a jimson weed flower in her famous 1932 work Jimson Weed/White Flower No. 1.

The painting presents a large white jimson weed blossom against a pale background. O'Keeffe often enlarged flowers so viewers could examine their shapes and structures closely. She explained that people in cities were so busy that they did not take time to look at flowers, so she painted them large.

Jimson Weed/White Flower No. 1 became especially famous after selling for $44.4 million at auction in 2014, then a record price for a work by a female artist. The title identifies both the plant and the flower's color.

Jimson weed is also known as Datura. It is a poisonous plant, but the painting is celebrated for its visual form rather than its toxicity.