Species are listed by scientific name. 
An asterisk* indicates a non-native species.

Follow this link to the iNaturalist field guide for Trees of Winnebago County!


Species Scientific Name
Boxelder Acer negundo*
Silver Maple Acer saccharinum
Sugar Maple Acer saccharum
Juneberry Amelanchier sp.
Musclewood Carpinus caroliniana
Yellowbud Hickory Carya cordiformis
Shagbark Hickory Carya ovata
Catalpa* Catalpa bignonoides
Hackberry Celtis occidentalis
Pagoda Dogwood Cornus alternifolia
Hawthorn Crataegus sp.
White Ash Fraxinus americana
Butternut Juglans cinerea
Black Walnut Juglans nigra
Eastern Red Cedar Juniperus virginiana
Mulberry Morus rubra
Ironwood Ostrya virginiana
White Pine Pinus strobus
Cottonwood Populus deltoides
Big-toothed Aspen Populus grandidentata
Trembling Aspen Populus tremuloides
Black Cherry Prunus serotina
Hop-tree Ptelea trifoliata
White Oak Quercus alba
Swamp White Oak Quercus bicolor
Red Oak Quercus rubra
Bur Oak Quercus macrocarpa
Black Oak Quercus velutina
Buckthorn* Rhamnus cathartica
Weeping Willow* Salix babylonica
Black Willow Salix nigra
Bladdernut Staphylea trifolia
White Cedar* Thuja occidentalis
Basswood Tilia americana
American Elm Ulmus americana
Slippery Elm Ulmus rubra
Nannyberry Viburnum lentago
Blackhaw Viburnum prunifolium
Arrow-wood Viburnum dentatum

Boxelder maple (Acer negundo) is a fast growing, wide spreading, short-stemmed tree of irregular shape. Under favorable conditions, it can grow 50 to 80 feet with a diameter of 24 inches. It is often planted for shade and ornamental purposes because of its rapid growth. Boxelder maples have compound leaves with three to five leaflets, growing 2-4 inches long and 1-2 inches wide. Like other maples, Boxelder maples have winged seeds, but they are one of the only maples to have drooping clusters of seeds. The twigs are green to purplish, covered at first with a bluish white bloom and later becoming smooth and shiny. The bark is finely ridged, grayish to dark brown, with the occasional greenish tinge.

Silver Maple (Acer saccharinum) are incredibly fast-growing trees with opposite, simple, palmately lobed leaves. The leaves are bright green with a silvery white lower surface that gives the tree a “silvery” appearance from a distance in gentle breezes. The five leaf lobes are often very deep with toothed leaf margins. Silver maples have red to dark reddish purple buds, tiny red flowers often hidden by bud scales, and reddish fruit. The bark of a young tree is smooth and light gray before it separates into irregular rows of long, scaly, ashy colored plates as the tree matures. It is often found in bottomland forests, stream banks, and floodplains, but is tolerant of a wide range of conditions. Silver maples range from green-yellow to yellow to brown in the fall.

White mulberry (Morus alba) is a fast-growing, short-lived tree native to northern China (where it was used to feed silkworms) and naturalized in the Americas. It has been used for several ailments in traditional medicine, including the treatment of prematurely gray hair. White mulberry is also a popular tea. Its young leaves are deeply lobed while mature leaves are simple. Its mature leaves are often confused with the native Red mulberry, and its young leaves are confused with Sassafras. Mulberries in temperate climates are deciduous, while mulberries in tropical climates are evergreen. White mulberries are especially unique because their pollen is released at half the speed of sound.