Bigleaf hydrangea (H. macrophylla) - Perhaps best-known among its counterparts, the Bigleaf hydrangea is hardy in Zones 6 to 9.
Lacecap varieties are also classified as Bigleaf hydrangea, and produce smaller flower clusters in which a ring of blossoms encircles a flattened center.
Endless Summer, a popular mophead variety is one example of a Bigleaf hydrangea.