Japan Flora: Large stout perennial; stems 1-1.5 m. long, rather densely short-pubcscent; leaves rather thick, ovatc-orbicular, 10-15 cm. long and as wide, obtuse to shallowly truncate-cordate at base, hairy above, densely short-pubescent beneath, the upper ones with coarse acute double teeth; pistillate glomerules rather thick in fruit, forming a contiguous elongate spike; achenes about 1.5 mm. long, the enveloping perianth pilosulous. Aug.-Sept.

Honshu, Shikoku, Kyushu. China and Indochina.