Ginkgo’s are in full show this time of year- changing from their hearty green foliage to the golden coat of autumn. These trees are unique botanically among showy fall trees, being among the most ancient know tree specimens and belonging to their own division classification with no direct relatives. Other unique qualities include insect and disease resistance, and a specially veined leaf, which does not display the typical palmate and pinnate veination of most other broad-leaf trees. There are a number of interesting cultivars available- with the most commonly used variety in Northern California being ‘Autumn Gold.’

For More:
Article from Wikipedia
List of Cultivars (.pdf)