Platanus occidentalis. Also known as the American planetree, this swift growing tree has beautiful exfoliating bark with huge, broad leaves. St. Lawrence Nurseries is roughly 100 miles north of the usual range for this tree, but the seed was collected from a mother tree (approx 150 years old), also well north of the usual range of the American sycamore. This is the first time we have been able to offer this plant, so we are not, at present, able to guarantee these trees. We believe we have found a cold-hardy strain of American sycamore, but we will need feedback from our customers to be able to further asses this!