Hydrangea.

The leaves are opposite and egg-shaped, thick and have serrated edges.

Hydrangeas in the early stages of flowering were white flowers with a little green color, then gradually turned bright blue, and later turned into reddish purple.

When the soil is strongly acidic, it has a lot of blue color, and when the soil is alkaline, it has an interesting physiological property of red color.

So, you can change the color of the flower by adding an additive to the soil, and the part that looks like a petal is actually a calyx, so there are no pistils and stamens in the flower.

As a semi-shaded plant, I like fertile and humid places, and in such places, several stems come out of the ground to form a nice tree shape, and large flowers bloom.

In the old days, flowers were dried and used as an antipyretic, and hydrangea is valuable as a medicinal material for both flowers, leaves, and roots.

It is said that it has the effect of strengthening the heart when the chest is pounding, severe fever, or strong heart.