Marsh Marigold 
Distribution: Across southeastern Canada and southward to Nebraska in the west to South Carolina in the east. Also occurs along the Pacific Coast.
Habitat: Marsh Marigold is found in swamps and along the sides of streams and brooks.
Flowering period: April to June.
Similar Species: The buttercup-like flowers, thick and rounded leaves, the thick hollow stems, and aquatic habitat are all unique features of Marsh Marigold.