The term 'showy spring flower' can be summarized by two crossword solutions: peony (5 letters) and IRIS (4 letters). Peonies are a type of flowering plant that is native to Asia, Europe, and Western North America. They are known for their large, showy blooms and sweet scent. Irises are also a type of flowering plant, but they are native to the Northern Hemisphere. They come in a variety of colors and sizes, and are often used in gardens and landscaping. Both peonies and irises are popular choices for showy spring flowers.