Ohwi 1985 Flora of Japan

Stems erect, simple, to 1 m. long, short-hairy above; leaves membranous, orbicular to depressed ovate-orbicular, often incised and long-caudate at apex, rounded to truncate at base, with unequal coarse teeth below and larger often double teeth on the upper margin, pilose on both sides, especially above and on nerves beneath; pistillate glomerules small, rather loosely arranged on slender axillary spikes; achenes about 1.5 mm. long, the enveloping perianth pilose.

Aug.-Oct. Lowlands and hills;

Hokkaido, Honshu, Shikoku, Kyu-shu; common. Korea and China.