Hydrangea hydrangea (scientific name: hydrangea (thunb. )ser。 ): It belongs to Hydrangea of Saxifragaceae. One of the meanings of hydrangea is "Thank you for understanding". Therefore, the health pavilion sent hydrangeas to friends circle to thank customers. Hydrangeas are in full bloom, big and beautiful, and the color can be red or blue, which is pleasing to the eye. It is a common potted ornamental flower.