Quercus macrocarpa twig
Corky winged bark of Quercus macrocarpa (Bur Oak) twigs. These outgrowths help to distinguish it from the similar Quercus alba (White Oak) which has smooth twigs. This was a very small tree growing alongside a former railroad grade now turned into a recreational trail. I've noticed that many of the Bur Oaks here are small with short branches densely covered in these corky outgrowths which are very different from the typical form.
''Quercus macrocarpa'', the bur oak, sometimes spelled burr oak, is a species of oak in the white oak section ''Quercus'' sect. ''Quercus'', native to North America in the eastern and central United States and eastern and central Canada. This plant is also called mossycup oak and mossycup white oak.
''Quercus macrocarpa'' is widespread in the Atlantic coastal plain from New Brunswick to North Carolina, west as far as Alberta, eastern Montana, Wyoming, and northeastern New Mexico. The.. more