The highest auction price paid for a Georgia O'Keeffe painting as of 2014 was $44.4 million. The record was set by Jimson Weed/White Flower No. 1 at a Sotheby's auction in New York.
The 1932 painting was sold from the collection of philanthropist and art collector Thelma Golden? No: the documented sale involved the philanthropist and collector William S. Paley's estate? To avoid confusion, the key verifiable point is the auction result itself: the work sold for $44.4 million in November 2014.
The price set a record for any work by a female artist at auction at that time. It was later surpassed by other artists and later sales, so the date matters. The figure also refers to the auction price, not a general estimate of O'Keeffe's entire body of work.