Tree leaves

red pine

eastern white pine

striped maple

sugar maple

red maple

tulip-poplar

northern white-cedar

horsechestnut

yellow birch

American chestnut

black walnut

butternut

eastern hemlock

American beech

paper birch

balsam fir

common buckthorn - Rhamnus cathartica Rhamnaceae

glossy buckthorn - Frangula alnus Rhamnaceae

honeysuckle - Lonicera spp. Caprifoliaceae

barberry - Berberis spp. Berberidaceae

Rubus spp. Rosaceae

pin cherry - Prunus pensylvanica Rosaceae

sweet fern - Comptonia peregrina Myricaceae

black cherry - Prunus serotina Rosaceae

choke cherry - Prunus virginiana Rosaceae

quaking aspen - Populus tremuloides Salicaceae

bigtooth aspen - Populus grandidentata Salicaceae

Asiatic bittersweet - Celastrus orbiculatus Celastraceae

maple-leaf viburnum - Viburnum acerifolium Adoxaceae

witch-hazel - Hamamelis virginiana Hamamelidaceae

beaked hazelnut - Corylus cornuta Betulaceae

hobblebush - Viburnum lantanoides Adoxaceae

gray birch - Betula

silver maple - Acer saccharinum Sapindaceae

black oak - Quercus velutina Fagaceae

northern red oak - Quercus rubra Fagaceae

white oak - Quercus alba Fagaceae

white ash - Fraxinus americana Oleaceae

black willow - Salix nigra Salicaceae

eastern cottonwood - Populus deltoides Salicaceae

green ash - Fraxinus pennsylvanica Oleaceae

elderberry - Sambucus spp. Adoxaceae

American basswood - Tilia americana Malvaceae

ironwood - Ostrya virginiana Betulaceae

eastern hackberry - Celtis occidentalis Cannabaceae

speckled alder - Alnus incana Betulaceae

musclewood - Carpinus caroliniana Betulaceae

butternut hickory - Carya cordiformis Juglandaceae

boxelder - Acer negundo Sapindaceae

wild grape - Vitis spp. Vitaceae

poison ivy - Toxicodendron radicans Anacardiaceae

common apple - Malus sylvestris Rosaceae

black birch - Betula lenta Betulaceae

staghorn sumac - Rhus typhina Anacardiaceae

Virginia creeper - Parthenocissus quinquefolia Vitaceae

Norway maple - Acer platanoides Sapindaceae

both sides sandpapery

slippery elm - Ulmus rubra Ulmaceae

one side sandpapery

American elm - Ulmus americana Ulmaceae

dogwood - Swida spp. Cornaceae

black locust - Robinia pseudoacacia Fabaceae

American sycamore - Platanus occidentalis Platanaceae

Lombardy poplar - Populus nigra ‘italica’ Salicaceae

serviceberry - Amelanchier arborea Rosaceae

Norfolk Island-pine - Araucaria heterophylla Araucariaceae

hawthorn - Crataegus spp. Rosaceae

ornamental yew - Taxus x media Taxaceae

pin oak - Quercus palustris Fagaceae

Scots pine - Pinus sylvestris Pinaceae

thornless honeylocust - Gleditsia triacanthos ‘inermis’ Fabaceae

Douglas-fir - Pseudotsuga menziesii Pinaceae

weeping Alaska-cedar - Callitropsis nootkatensis ‘pendula’ Cupressaceae

Norway spruce - Picea abies Pinaceae

river birch - Betula nigra Betulaceae

Kentucky coffeetree - Gymnocladus dioicus Fabaceae

Austrian pine - Pinus nigra Pinaceae

gingko - Gingko biloba Gingkoaceae

swamp white oak - Quercus bicolor Fagaceae

blue spruce - Picea pungens Pinaceae

white spruce - Picea glauca Pinaceae

mountain maple - Acer spicatum Sapindaceae

mountain paper birch - Betula cordifolia Betulaceae

red spruce - Picea rubens Pinaceae

lowbush blueberry - Vaccinium angustifolium Ericaceae

American mountain-ash - Sorbus americana Rosaceae

Canada yew - Taxus canadensis Taxaceae