Gyrocarpus americanus is a species of flowering plant in the family Gyrocarpaceae. It is a small tree, growing up to 10 meters tall, with a trunk diameter of up to 50 cm. The leaves are pinnate, with 5-7 leaflets, and the flowers are small and greenish-yellow in color. The fruit is a woody capsule, about 5 cm in diameter, which splits open to release the seeds.