A few shrubs blooming around town right now:
There's an impressive grouping of Fothergilla, a shrub native to the southeast US, near the ballfield at Marquand Park. In shady locations, it's less opulent with the blooms, but its leaves still turn a brilliant orange in the fall.
Here's a closeup.
English Laurel is in full bloom at Pettoranello Gardens. Though not native, it has not proven invasive, and can be a sturdy evergreen for landscaping.
Blackhaw Viburnum is a common large shrub growing wild at Mountain Lakes Preserve, just down the long driveway from Pettoranello Gardens. The flowers are often 20 feet up, and are harder to see now that the woods is greening up.