Here's a closer look at the leaves and flowers.

That's a doublefile viburnum. Either Shasta, Mariesii, or Summer Snowflake. Mine are blooming right now too. I'm in zone 6. Great fall color.

Prune those into a globular shape and you will be fiercely rewarded!!

Thanks so much for the identification. They smell awesome too. With an open window nearby it fills the whole room with it's scent. I'm assuming wait until blooming is done to prune??

Sure. Some bloom later in the season also...

No!! Don't prune it into a ball!! These shrubs are characterized by a very layered, horizontal growth habit, with tiers of branches topped by the flower clusters. Pruning it into anything other than its natural form is a bit of a sacrilege, IMO.

You can remove some of the lower branching, lifting it into more of a tree form but please - no rounded balls!!

FWIW, only 'Summer Snowflake' will offer a rebloom, with sporadic flower production throughout the summer. Other doublefile cultivars are single bloomers.

OK, point taken. I'm pretty sure this is only blooms once. Don't recall a second blooming in the previous 3 years. So if it's not a 'Summer Snowflake,' it's either a Shasta, or a Mariesii. Sorry to get off the hydrangea track.