Sentry Ginkgo is an attractive male selection with a symmetric narrow form. It will not produce the distinctive smelly fruit. It will develop into upright narrowly pyramidal shape, and with increased age, mature to a large 50' by 30' tree. Its narrow shape makes it work well as a street tree but, due to its ultimate mature height, should not be planted under power lines. The Ginkgo is an ancient deciduous conifer and evidence has been found which shows this tree coexisted with the dinosaurs. Ginkgo is sometimes called the maidenhair tree due to its beautiful fan shaped leaves that resemble a maidenhair fern frond. It is one of the most pollution-tolerant trees and works well in the city. Insignificant green flowers appear in the spring. Ginkgo has wonderful golden yellow fall color. It produces stout spurs along the branches; these spurs and the stiff branches give the Ginkgo an unusual and almost sculptural spiky appearance in winter.