Diane:

Thanks for the reference to the Ginkgo biloba post. It is easy to plant and grow Ginkgo seeds, and I have seen a few small trees in the Brooklyn Botanic Garden , growing in places where seeds evidently landed when they fell from nearby female trees. But this sort of occurrence is unusual. As the Ginkgo escaped its former natural enemies when it became rare, it probably also lost animals that were attracted to the smelly covering of its seeds. These animals may have eaten the seeds and spread them in their droppings. If these animals still existed, perhaps we would see more Ginkgo trees in the wild.