Quercus macrocarpa Michx.
Bur Oak, Blue Oak, Mossy-overcup Oak, Scrub Oak
Bur oaks are natives of North America.
Identification: This oak reaches 70-80' (21-24 m) in height, sometimes up to 100' (30 m). It is very drought-resistant. It prefers limestone soils. Leaves are usually about 6" (13 cm) long, sometimes up to 15" (38 cm), and very deeply divided. They are yellow-brown in the fall. This species has the largest acorns of any oak, 1-1½" (2.5-3.8 cm) long, half covered by the cap, which has a hairy or mossy fringe. See the Quercus comparison table.
Quercus macrocarpa at the USDA Forest Service's Silvics of North America site
Quercus macrocarpa at the University of Connecticut Plant Database
Quercus macrocarpa on Wikipedia
Quercus macrocarpa at the Ohio State University PLANTFacts database
Quercus macrocarpa on Plants for a Future, a resource and information centre for edible and otherwise useful plants
Quercus macrocarpa at the Lady Bird Johnson Wildflower Center
Quercus macrocarpa at the Virginia Tech Department of Forest Resources and Environmental Conservation
Quercus macrocarpa on the USDA Forest Service's Fire Effects Information Database
Quercus macrocarpa at the University of Florida Institute of Food and Agricultural Sciences
Quercus macrocarpa on eFloras
Quercus macrocarpa description by Thomas H. Kent, last updated 25 May 2020.