Conversation so far:
What is Georgia O'Keeffe most remembered for?
O'Keeffe was a legend beginning in the 1920s, known as much for her independent spirit and female role model, as for her dramatic and innovative works of art.
What was her most famous work of art?
CANNOTANSWER.
Did she 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 Georgia O'Keeffe stamp in 1996?