Identification
This native perennial sunflower grows up to 8 feet and taller. The toothed leaves are joined around a square stem (perfoliate) to form a “cup” which can hold water (B,D). Lower leaves are much bigger than the upper ones. The yellow flower heads are found in clusters at the top of the plant; each measures up to 4 inches across (A,E).
Found along ditches, streams and trails on the floodplain, flowering from July through August. Common at Fontenelle Forest. Rare at Neale Woods where it has only been found along the edge of the pond at the north end of Raccoon Hollow.
Gillmore indicates the Omaha-Ponca called this plant “big weed” because of its size. The root stock was used by Native Americans in a smoke treatment for head colds, neuralgia and rheumatism. Also called Cup Plant.
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