Japan Flora: Radical leaves petiolate, depressed-orbicular, 5-10 mm. long, 5-15 mm. wide, undulate-toothed; scapes 5-10 cm. long, loosely few-flowered; calyx-tube cup-shaped, the lobes pale green, erect, ovate to depressed-rounded; stamens slightly longer than to as long as the calyx-lobes, the anthers yellow; capsules compressed, erect, the valves unequal; seeds mammillate on the ribs. Mar.-Apr.