Complex sentence: Mayor DeLashmutt did once own a building at Southwest Front and Madison streets in Portland that the called the "Witch Hazel Building", so apparently he liked the name, although the witch-hazel plant, "Hamamelis virginiana", is not native to Oregon.
Split into simpler sentences: Mayor DeLashmutt did once own a building at Southwest Front and Madison streets in Portland that the called the "Witch Hazel Building". Apparently he liked the name, although the witch-hazel plant, "Hamamelis virginiana", is not native to Oregon.