This is Albiziajulibrissin, known as the Persian Silk tree, among other names. The leaves suggest a Mimosa, which it is also sometimes called. It is a legume, Family Fabaceae. The flowers, with their clusters of thread-like stamens, aren't typically pea-like, but the fruit is a flat pod containing several seeds. It is native to Asia, from Iran to China (Wikipedia).
This tree is in the arboretum at Garden City Park. It is not presently at the stage shown; these pictures were taken last year, late in July.
A reminder of two tree/plant blog carnivals that have appeared in the past two days: