By Brennah Cavanaugh, Board Member of Crossing Hedgerows Sanctuary   Buttonbush is a bush with very unique looking flower clusters that are almost perfectly spherical. Its flowers are adored by pollinators of all sorts, but due to the long tube-like shape of the individual flowers in the cluster they are especially attractive to pollinators with longer tongues, like butterflies, bumble bees, and hummingbirds. (The unusual shape of the flowers make them attractive to humans, too!) It is ...