Japan Flora: Much branched scandent, green annual, retrorsely spinose- scabrous on stems and petioles; leaves membranous, long- petiolatc, palmately 5- to 7-cleft, 5-12 cm. long and as wide, cordate, regularly serrulate, the lobes acuminate, slightly nar-rowed toward base, with yellow sessile discoid glands beneath, scabrous on both surfaces; staminate flowers in loosely arranged erect panicles 15-25 cm. long, pedicelled, nodding, the anthers pale yellow, pendulous on slender filiform filaments; pistillate spike conelike, broadly ovoid, the bracts ovate- orbicular, 7-10 mm. long, imbricate, herbaceous, accrescent after anthesis, scabrously pilose on back and especially on margin; achenes ovate-orbicular, inflated-lenticular，yellow-brown, pubernlous near the top, glandless, 4-5 mm. long and as wide. Sept-Oct. Thickets and roadsides in lowlands;

Hokkaido, Honshu, Shikoku, Kyushu; very common. Ryukyus, Formosa, and China.