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Hydrangea macrophylla
It is a deciduous shrub, with a dense foliage forming a large ball reaching a height of about 1 to 2 m. Hydrangea macrophylla blossoms can be either pink, blue, or purple shades, depending on a pH-dependent mobilization and uptake of soil aluminium into the plants. [Wikipedia]
Native to Japan. It is widely cultivated in many parts of the world in many climates.
Found around a house, looks like an ornamental plant. [Portuguese] Encontrada ao redor de uma casa, parece uma planta ornamental.