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Quercus rubra - Wikipedia
Red Oak Tree: Leaves, Bark, Acorns (With Pictures) - Leafy Place
How to Grow and Care for a Red Oak Tree - The Spruce
Northern red oak | The Morton Arboretum
Red Oak | The Wood Database (Hardwood)
Northern Red Oak - US Forest Service Research and Development
Quercus rubra (American Red Oak, Eastern Red Oak, Mountain Red Oak …
Red oak | Plant Subgenus, Growth & Uses | Britannica
Red oak tree care and growing guide | Gardeningetc
Quercus rubra (northern red oak): Go Botany