Japan Flora: Stems slender, elongate, diffuse, loosely branched, sparsely retrorse-prickly, the internodes elongate; leaves thinly hairy on both sides, hastate, broadly ovate, truncate at base, the midlobe large, not contracted at base, the lateral ones spreading, deltoid or ovate- deltoid, acute or rather obtuse; petioles rather long, not winged; inflorescence terminal and axillary; achenes gray, lustrous. Mountains;

Honshu.