Grow Your Own Mighty Oak! The Bur Oak (Quercus macrocarpa) makes an outstanding ornamental tree and is one of the most tolerant white oaks. It is sometimes spelled Burr Oak and is also called Mossycup Oak. A long lived tree the Bur Oak typically lives between 200-300 years and its mature height is up to 100 feet. A beautiful, stately tree that is tolerant of a variety of soil and water conditions. It also adapts well to urban settings. It can be grown from Alaska to Texas, further proof of its mighty strength. From spring to summer the Bur Oak flaunts its distinctive, lobed, shiny, deep green leaves. Shortly after the arrival of the leaves your oak will flower. No traditional flower would do for the oak though. Instead it will be dripping with yellow-green catkins. The elegant, almost whimsical flowers are where the acorns will originate. The acorns of the Bur Oak are the largest of all North American oaks. They are very important to wildlife as a food source. Squirrels, some birds and even some ducks rely on the acorns for food. A beautiful, rugged tree that will bring wildlife to your yard and last for many generations, the Bur Oak is a great choice. * Long Lived* Drought tolerant* Very adaptable .