According to the Wikipedia article referenced here, &quot;the age of the tree was determined by carbon dating of genetically matched plant material collected from under the tree&quot;<p>There&#x27;s a tree on my campus called the George Washington Elm; <a href="http:&#x2F;&#x2F;www7.nau.edu&#x2F;arboretum&#x2F;Littleman&#x2F;washington_elm.html" rel="nofollow">http:&#x2F;&#x2F;www7.nau.edu&#x2F;arboretum&#x2F;Littleman&#x2F;washington_elm.html</a><p>It was apparently grown from a rooted sprig of the tree under which George Washington assumed command Of The Continental Army on July 3, 1775<p>Genuinely curious; does this mean the George Washington Elm tree here would be classified as being over 250 years old?