If your outdoor area carries a faint, fishy odor, it's likely due to the presence of a Callery Pear Tree, more commonly known as the Bradford Pear Tree. Though their delicate white blossoms ...

And if you live in the U.S. Northeast, Midwest or South, you have probably seen a medium-sized tree with long branches, covered with small white blooms – the Callery pear (Pyrus calleryana).