Select Persian Ironwood. This improved form of Parrotia has better cold hardiness than the species. We have noticed some strains of this plant can be hurt even here with a deep freeze. This Iranian native is grown for its beautiful exfoliating bark and its outstanding fall color of yellows, reds and oranges. Dirr speaks highly of this species, and when one needs a medium tree for the landscape, this plant can be the best choice. Being in the Witchhazel family, one might notice the small apetalous flowers emerging in the late winter here before the foliage. The older a specimen gets, the more character it evokes.