Japan Flora: Rhizomes rather slen­der, creeping; stems erect, 40-70 cm. long, often branched, re­curved white-pubescent on the angles; lower leaves cordate, the petioles 2-7 cm. long, the median deltoid-ovate or deltoid- orbicular, 3-6 cm. long and as wide, obtuse to acuminate with an obtuse tip, truncate or very broadly cuneate at base, coarsely obtuse-toothed or incised, shallowly cordate in the lower ones, pubescent on both surfaces especially on nerves beneath; floral bracts leaflike or broadly ovate and smaller, the petioles 1-2 crn. long; flowers 1-3 in axils, dark red-purple, 18-20 mm. long; calyx loosely puberulent, about 8 mm. long in back, 11 mm. long in front, oblique at the mouth, the teeth narrowly deltoid, spine-tipped, ascending; lower lip of corolla 7-8 mm. long, spreading； nutlets obovate-cuneate, 2.5-3 mm. long, 3- angled, rounded at apex. Sept. Woods in mountains; 

Honshu (Sagami Prov. and westw.), Shikoku, Kyushu.