The term 'five-petal flower' can be solved by the five-letter word 'sedum'. Sedum is a genus of flowering plants in the family Crassulaceae, commonly known as stonecrops. They are succulent plants with fleshy leaves and stems that are native to the Northern Hemisphere. Many species of sedum have five petals, making them a popular choice for gardeners looking to add color and texture to their gardens.