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Plants to 150 cm tall. Rhizomes short; roots slender, ca. 1 mm in diam. Stolons 1 to several, or absent. Stems erect, often hispidulous below, glabrous above except at nodes. Basal leaves long petiolate; petiole to 9 cm; blade pinnatisect or pinnatifid, rarely simple and cordate; terminal segment ovate to ovate-lanceolate, 3.5-7 × 1.5-3 cm, hispidulous to glabrate, base subrounded, margin entire or serrate, apex acuminate; lateral segments 4 or 6, remote, reduced toward petiole. Cauline leaves similar, gradually reduced apically. Inflorescence paniculiform, flowers and fruit in remote dichasial clusters, primary peduncles to 70 cm; bracts linear-subulate; bracteoles deltoid-ovate, ca. 1/2 as long as achenes, margin entire or crenulate. Corolla white, pinkish white, or purplish, campanulate to funnelform, 1.5-2.5(-3.5) mm, tube and lobes of equal length. Stamens and style subequal to corolla in length or slightly exserted. Achenes broadly ovoid to ovoid, 2-3 × 1-1.2 mm, hispidulous or less frequently glabrous. Fl. Jun-Aug, fr. Jul-Oct. 2n = 14, 16, 28, 32.
A herb. It grows 1.5 m tall. The stems are erect and often have hairs on the lower section. The leaves at the base have long stalks. The leaves are simple or can have 3-5 lobes.
