Ginkgo biloba are a very ancient tree species and a living fossil-the oldest tree species known. The straight ash-gray trunk has cracks running down the bark. The branches are spreading and horizontal. Female trees have a wide crown with more deeply incised leaves, turning yellow a month later than those on the male tree. The light-green leaves turn golden yellow in autumn, and the Chinese have called it “tree of the forty gold crowns.” As a tree ages, it often grows aerial roots.
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