Extremely cold-hardy Viburnum carlesii is hardy from zones 2 – 8. Above: Pleated leaves beneath double rows of flowers. Doublefile refers to the way that the flowers are held in double rows ...

Viburnum tinus, an evergreen species hailing from the Mediterranean region, forms a dense shrub to 10 feet and features oblong, dark green leaves to 4 inches. It bears small, salverform white ...