Herbs perennial, 32-50 cm high. Rhizomes with many slender, long, fibrous roots, fragrant. Stems erect, 1 or several in a fascicle, with 5-7 conspicuous nodes; internodes 0.7-2.5 cm, basal nodes with 1 pair of scalelike leaves. Scalelike leaves triangular, membranous. Leaves opposite, 4, sometimes 6, on stem apex; petiole 0.7-2.5 cm; leaf blade elliptic to broadly elliptic, 10-13 × 4-7 cm, papery, glandular mucronate, glabrous abaxially, base broadly cuneate, margin densely and sharply serrulate, apex gradually angustate and caudate; lateral veins 6 or 7 pairs. Spikes several, axillary and terminal, slender, 1.5-5.5 cm with peduncle; bracts obovate. Flowers sparsely arranged, white, small. Stamen 1, on outside of apical part of ovary; connective oblong, ca. 0.7 mm, apex not projected, nearly as long as thecae; anther 2-loculed. Ovary ovoid, ca. 1 mm; style absent; stigma subcapitate. Drupes obovoid; stalk short. Fl. Jun-Jul, fr. Aug.
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