Cedrus a. 'Fastigiata'
Also known as 'Pyramidalis', this narrow, columnar tree is just the ticket for a tall tree that has a small footprint. Excellent blue-green foliage on a tree with a strong central leader and dense steeply ascending branches. Relatively fast growing, the tree will top out at 40 ft, but only 10-15 ft wide. Likes a full sun exposure.