The Colonial Williamsburg Arboretum is a Level 2 Certified Arboretum comprised of 18th-century tree and woody shrub varieties. The collection features 25 period species of oak trees and more than 30 historic gardens. The Arboretum is home to 20 Virginia state champion trees and two national champion trees—the jujube (Ziziphus jujube), and the Paper Mulberry, (Broussonetia papyrifera) .