What was the title of Georgia O'Keeffe's 1932 painting that became her largest flower painting?

Georgia O'Keeffe's 1932 painting that became her largest flower painting was Jimson Weed/White Flower No. 1.

The work shows a large white jimson weed flower against a dark background. O'Keeffe often enlarged flowers so viewers had to confront their forms and subtle variations in color. The painting measures about 121.9 by 101.6 centimeters and is one of the best-known examples of her close-up flower imagery.

The painting was formerly owned by philanthropist David H. Koch. In 2014, it sold at Sotheby's for $44.4 million, including fees, setting a record for the highest price paid at auction for a work by a female artist at that time. It is now associated with the Crystal Bridges Museum of American Art.