The term GIGANTIC-LEAFED ORNAMENTAL PLANT is a 7 letter crossword solution which refers to the Gunnera plant. Gunnera is a genus of herbaceous perennial plants native to tropical and subtropical regions of the world. It is known for its large, umbrella-like leaves and its ability to thrive in wet, boggy areas. The Gunnera plant is often used as an ornamental plant in gardens due to its impressive size and unique foliage.