Either annual or perennial species, found either along the very wet shorelines of ditches or ponds, or in wet marshy habitats. They sometimes may grow from submerged soils. Reproduction is from seeds, but growth also is from the spreading rhizomes or stolons. Foliage dies back in cold winter climates, but may persist in warmer areas.
These are perennials that re-grow from the roots. Extremely wet aquatic or semi-aquatic habitats are preferred.