A low-growing perennial herb or a dwarf undershrub up to 15(-30) cm tall, most of the stem underground with creeping woody rhizome, the aboveground part slender and simple or with single dichotomous branching. Leaves obovate, (2.5-)5-12(-15) cm x (2-)3-7(-10) cm, dentate or crenate-undulate in the upper half, subglabrous, sessile or subsessile, lowest pair lying flat on the ground. Flowers with pedicel 1.5-2 mm long, corolla white or greenish-white. Fruit obovoid-globose, 5-8(-10) mm long, green turning black. |