Ginkgo biloba 'Bell' is a male cultivar. It takes its name from a tree growing at the home of James Bell, Atherton, California in the U.S.A. It was propagated by the Saratoga Horticultural Research Foundation in California U.S.A. and was renamed Ginkgo biloba 'Canopy' in 1959 when it was released to the trade.
 
Description - Ginkgo biloba ‘Bell’ renamed ‘Canopy’. The foliage is typical of the species. This male cultivar is described as initially upright, later developing a broad head. The growth rate is 20cm a year. Expect it to reach a height of 1.8m – 2.0m in 10years. Eventually expect a tree with 10m height with a broad crown spreading to approximately 4.5m.