Conversation so far:
What is Georgia O'Keeffe most remembered for?
She was best known for her paintings of enlarged flowers, New York skyscrapers, and New Mexico landscapes.
What was Georgia O'Keeffe most famous work of art?
O'Keeffe's 1932 painting Jimson Weed sold for $44,405,000, more than three times the previous world auction record for any female artist.
Did Georgia O'keeffe ever get special recognition of any kind?
In 1996, the U.S. Postal Service issued a 32-cent stamp honoring O'Keeffe.

Question: what was featured on the stamp?
Self-contained rewrite: what was featured on the stamp issued by the  Postal Service?