The John and Madeline McClean Outdoor Education Preserve is home to a wide variety of trees. To learn more, click any of the trees below. Pin Oak White Oak White Swamp Oak Black Oak Red Oak Iron Wood Pignut Hickory Shagbark Hickory Sassafras Sugar Maple Red Maple White Birch Black Birch Yellow Birch American Beech Tulip Tree Black Cherry Tree Russian Olive Pussy Willow Aspen Crabapple