The Dawn Redwood (Metasequoia Glyptostroboides) is a fast growing deciduous conifer that produces cones between 1/2 & 1 inch. More information below the photos.
It can grow to a height of 100 feet and a width of 25 feet in nature. It requires cool to cold winters, but should be protected from extreme cold (low teens & below) in winter. It should get as much unfiltered, direct sun as possible. As you might imagine, in nature a 100 foot tall tree is not obstructed from the sun.