marsh marigold - caltha palustris, yellow flowers

april background beautiful beauty bloom blooming blossom bog botany bright buttercup caltha calthapalustris damp flora flower garden gold golden grass green ground kingcup leaves marigold marsh marshmarigold may mayflower meadow nature outdoor outdoors palustris park petal plant pond ranunculaceae season spring stalk stamen summer swamp water wet wild wildflower yellow