Origin: Latin suffix -al
Ornamental has 4 different meanings across 2 categories:
any plant grown for its beauty or ornamental value
"She lined her garden path with vibrant petunias, which are popular ornamental plants known for their striking colors."
An ornamental plant.
"The neighbors planted several ornamental plants along the fence to brighten up their garden."
serving an esthetic rather than a useful purpose
"cosmetic fenders on cars"
"the buildings were utilitarian rather than decorative"
Serving as an ornament; having no purpose other than to make more beautiful.
"The garden is filled with ornamental shrubs that add vibrant color but provide no fruit or shade for the house."