Eager to help Mr. Green (Edward Norton) find a cure to his gamma sickness, Mr. Blue (Tim Blake Nelson) sent him a book to help him find a rare flower with medicinal qualities.
This is a faux plastic flower of the Corablanca specimen, featuring several blossoms and vines. The item has a small piece of brown rope around it, presumably the same cord which was attached to the green leaves we can see in the movie.
The flower represents one of the key props in the early stage of the movie.
COA: Marvel Studios