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Quercus macrocarpa - Wikipedia
How to Grow and Care for Bur Oak - The Spruce
Bur oak Bur oak - The Morton Arboretum
Bur Oak - US Forest Service Research and Development
Everything You Want to Know About Bur Oak Trees (and Acorns)
Bur oak | Tree, Leaf, Bark, & Facts | Britannica
Quercus macrocarpa - Plant Finder - Missouri Botanical Garden
Bur Oak, A Top 100 Common Tree in North America - ThoughtCo
Bur Oak Tree - Forestry.com
Quercus macrocarpa — burr oak - Go Botany