| Regno | Plantae |
| Sottoregno | Tracheobionta |
| Superdivisione | Spermatophyta |
| Divisione | Magnoliophyta |
| Classe | Magnoliopsida |
| Ordine | Cornales |
| Famiglia | Hydrangeaceae |
| Sottofamiglia | Hydrangeoideae |
| Genere | Hydrangea |
Hydrangea, commonly referred to as Hortensia or Hydrangea, is a captivating genus of flowering plants known for their stunning and diverse blooms. The genus includes around 70-75 species, each boasting unique flower shapes, sizes, and colors. Hydrangea plants are prized for their ornamental value and are popular both as garden shrubs and potted plants.