Ginkgo biloba 'Sinclair' is a fast-growing, upright, tree form of maidenhair tree that is species-typical with the exception of more open branch structure than one usually sees. After 10 years of growth, a mature specimen will measure 12 to 18 feet (4 - 5 m) tall, an annual growth rate of 12 to 18 inches (30 - 45 cm).
This cultivar originated as a relatively unique specimen found in the mid 1960s near a Sinclair gas station in Princeton, New Jersey; and introduced to the nursery trade by Princeton Nurseries, inc.