ornamental

Etymology

ornament + -al

adj

1. Serving as an ornament; having no purpose other than to make more beautiful.
   Some think it most ornamental to wear their bracelets on their wrists; others, about their ankles.
   There were ornamental ponds and shrubs clipped into animal shapes, painted concrete gnomes sitting on mushrooms, pink flamingos standing on one leg[.] 1968, Carl Ruhen, The Key Club, Sydney: Scripts, page 20
2. (of a plant, fish, etc.) Bred for aesthetic or decorative purposes.

noun

1. An ornamental plant.
   The tumbleweed is a gracious gift from the Russians, having been imported as a favored ornamental from the steppes of central Asia. 10 October 1991, Jackson Granholm, “In praise of the tumbleweed”, in News Chronicle, Thousand Oaks, Calif., page B-7, column 3