Caltha palustris, commonly known as the marsh marigold, is a perennial plant found in wetland areas across North America and Europe. It typically blooms in early spring, producing bright yellow flowers that can reach up to 2 inches in diameter. The leaves are large, heart-shaped, and glossy, growing from thick stems that can rise above the water. This plant thrives in moist, marshy environments, often found near streams, ponds, and swamps. Caltha palustris is an important species for local ecosystems, providing food for various insects and serving as a habitat for amphibians. However, it can be toxic if ingested in large quantities.