Tulip Tree (Tulip Poplar) - Liriodendron tulipifera - The Tulip Poplar is a fast-growing, tall North American hardwood tree that can reach a height of over 150 feet! Hummingbirds and honeybees enjoy its nectar, while Yellow-bellied Sapsuckers enjoy its sap. Tulip Poplars produce seeds, which are favorites of Northern Cardinals. They have attractive spring flowers and great fall color!