Author 'Fanfan' (Id 37417 ) : The hydrangea of the gardens stems, large wet forests of China. They sot of the family of the hydrangeacees. But where is the hydrangea Word?: On said that of the first name hortense. But which? hortense of Beauharnais, Hortense of Nassau, or Hortense LePaute?Historians say that hydrangea is hortus derivative, hotensis which means garden! FanFan.