The Ginkgo Biloba is arguably the most fascinating tree you will find on this, or any other site. It is referred to as a "Living Fossil" because for centuries, it was thought to be extinct. It's lineage can be traced back to about 270 million years ago, which is nearly 50 million years before the Jurassic period. It was though to be extinct in North America for 7 million years, and Europe for 2.5 million years. It is a great pre-bonsai subject for all the above reasons, and also because it adapts so well to pre-bonsai cultivation. For a fascinating site filled with great facts and information about the Ginkgo copy the following link.