Hydrangea arborescens, also known as smooth hydrangea, is a popular flowering shrub native to the United States. It's a great addition to any garden or landscape project, with its big, round blooms that come in a range of colors, from white and pink to blue and purple. However, if you're looking for alternative names for hydrangea arborescens, you may come across a range of synonyms. Some of the most common ones include wild hydrangea, sevenbark, and smoothleaf hydrangea. Regardless of its name, this beautiful plant is sure to bring joy to any garden it graces.