Madison Square Park boasts 35 varieties of redbuds, among the most beautiful native trees of the Northeast. They blossom in the park during April, when clusters of stunning pink flowers along their stems and branches announce the return of warmer days. When these flowers fall, the trees’ heart-shaped foliage begins to unfold. The leaves of redbuds are especially important to leaf cutter bees, who use them to create their hives. Redbuds generally have a short trunk and rounded crown of foliage, and mature trees can grow to up to 30 feet in height.