Bradford pears (Pyrus calleryana) are very common in our area.  Unfortunately, they are very susceptible to wind damage.  This can be handled by proper pruning techinques.  There is a specific protocol for the pruning of these trees.  The bottom pic shows the classic "Rosaceae" anatomy:  the stamens, petals and sepals are all attached to the outer rim of a cup called a hypanthium.  I think this picture implies how that attachment occurs.