The numerous pistils are also free from each other and are smooth. The light green sepals are smooth or hairy, also not connected to each other and pointingĭownward and about ½ inch long (shorter than the petals). The base of each petal has 5 fine lines that serve as nectar guides. The yellow petals are waxy, not connected to each other and are about 2/3 inch long. The diameter of the flower is about 1.5 inches. The middle leave is longer than the two lateral leaves and also has a longer petiolule (stalk) at its base.įlower | Seeds: One to several flowers are occasionally produced from about April-June from an unbranched stalk about 4-6 inches long. They blossom can last about 1.5 months. The flower has 5 yellow petals, 5 light green sepals, many yellow stamens and a cluster of pistils in the center of the flower. Stalked, usually toothed and usually divided again. Leaf: The basal leaves are alternate and pinnately divided into usually three leaflets that are approximately three inches long and approximately three inches wide. In fact, some authorities consider it to be a sub-species of Ranunculus hispidus. This is an extremely variable species and is easily and often confused with other species and sub-species of buttercup. They reproduce both by seed and vegetatively (by sprawling and forming new roots as it goes). Thus, the swamp buttercup population is alive and well. These areas are too wet for many other plants, including invasive species (like garlic mustard).
Therefore, this species of buttercup likes to live in soggy areas such as ditches, bogs, ponds and along rivers and lakes. Swamp buttercup grows in areas that are very moist (hence the first part of the name: swamp).
The flower has 5 yellow petals, 5 light green sepals, many yellow stamens and a cluster of pistils in the center of the flower and is about 1.5 inches in diameter. It produces one to several yellow buttercup shaped flowers (and hence its name) from about April–June that last about 1.5 months. They usually creep along the ground for up to 2.5 feet. Its stems can be either light green, brownish green or reddish green in color and glabrous to slightly pubescent. Its dark green basal leaves are alternate and pinnately divided into usually three leaflets that are approximately three inches long and approximately three inches wide. The Swamp buttercup is about 6 inches tall. This perennial plant is native to Illinois and grows throughout the state and most of the upper Midwest in the United States. The Ranunculaceae family includes the species Ranunculus septentrionalis (otherwise known as the swamp buttercup).
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