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

Georgia O'Keeffe's 1932 painting was titled Jimson Weed/White Flower No. 1.

The work shows a large white jimson weed flower against a pale background. O'Keeffe frequently enlarged flowers so that their shapes and tonal changes filled the picture surface, encouraging viewers to look closely at forms they might otherwise overlook.

The painting became famous after selling at auction in 2014 for $44.4 million, including the buyer's premium. That price made it, at the time, the most expensive painting by a female artist ever sold at auction.

It is sometimes confused with O'Keeffe's Black Iris paintings or with her red canna studies, which belong to different flower series. The title's slash and numbering are important: the work is commonly identified as Jimson Weed/White Flower No. 1, not simply as a generic white-flower painting.