Introduced by Princeton Nurseries in 1967, Ginkgo biloba Princeton Sentry® is a columnar, male cultivar of Gingko that is tolerant to many adverse conditions. Capable of handling urban sites, polluted and compacted soils, as well as saline conditions, this Ginkgo cultivar is a popular choice as a street tree. Chartreuse, two-lobed foliage turns a uniform golden yellow in autumn and persists on the tree for several weeks, eventually dropping and creating a golden, halo-like carpet around the base.