Japan Flora: Rather fleshy stoloniferous per­ennial with coarse brownish red hairs; rhizomes short; leaves fleshy, reniform-orbicular, 3-5 cm. long, 3-9 cm. wide, shal­lowly lobulate, toothed, pale variegated above, purplish red beneath, the petioles 3-10 cm. long, dilated and long-ciliate at base; scapes 20-40 cm. long; inflorescence a broad panicle 10-20 cm. long, short glandular-pubescent; calyx-lobes nar­rowly ovate, 3-4 mm. long, recurved above; petals spreading, the upper 3 ovate, acute, about 3 mm. long, short-clawed, spotted, the lower 2 unequal, lanceolate, 10-20 mm. long, spotless; stamens 4-7 mm. long, the filaments slightly broad­ened above; capsules ovoid-globose, 4-5 mm. long, shallowly 2-lobed; styles rather long; seeds ovoid, warty, about 0.5 mm. long. May-July. Wet soils and rocks.

Honshu, Shikoku, Kyushu. China. Frequently planted in gardens.

f. aptera (Makino) Hara. Abnormal phase with 5 equal petals