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Quercus macrocarpa 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. Online References:
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 References:
Sibley, David Allen, The Sibley Guide to Trees, Alfred A. Knopf, 2009, p. 209 Quercus macrocarpa description by Thomas H. Kent, last updated 25 May 2020.
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9/7/2010 · Tower Hill Botanic Garden, Boylston, MA
7/15/2020 · Garden in the Woods, Framingham, MA
5/22/2010 · Garden in the Woods, Framingham, MA Range:
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