Sentence:  If the grafted portion of an <WSD>Apple</WSD> or other tree were examined after one hundred years, the old cut surfaces would still be present, for mature or ripened wood, being dead, never unites. 
Meaning of the word marked with <WSD> tags:  A tree of the genus "Malus", especially one cultivated for its edible fruit; the apple tree. (from 15th c.)