Some of these flowering perennials are low ground covers which are also good in hanging pots. Others make fine cut flowers. All enjoy moist places near ponds or streams. One type, the easy-to-grow, invasive, Loosestrife (Lysimachia punctata), is more manageable in harsh northern climates or in the dry West. Cold or drought prevents the ground cover from becoming weedy. Buy in container and divide for new plants.
This rapidly spreading, creeping perennial has smoothly rounded, dark green leaves and summer-blooming, bright yellow, fragrant flowers.