Viburnum opulus Also, Known As: Crampbark Cranberry Bush Cranberry Tree Guelder Rose Pembina Pimbina Whitten Tree Crampbark (botanical name Viburnum opulus) is basically a shrub that is indigenous to Europe as well as North America and is also found growing in the northern regions of Africa and Asia. The US National Formulary documented crampbark as … Continue reading Crampbark