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Also known by the common name American threefold, this species can attain a height of 20 to 200 centimeters, and exhibits a stiff erect, much-branched growth form. The numerous leaves extend from petioles with length of 1.5 to 5.0 millimeters. The linear-lanceolate leaf blades are two to eleven centimeters long. Blades are acute at both ends, and often have a margin that is rolled under.