Rhizome terete, 4--10 mm thick. Stem arching, purple spotted, 20--40(--80) cm. Leaves alternate; petiole 0.5--1.5 cm; leaf blade lanceolate to elliptic, 5--14 × 1.2--6 cm, base rounded to obtuse, apex acuminate to attenuate-acuminate. Bracts absent. Flowers usually solitary, occasionally in clusters of 2 or 3; pedicel (0.2--)1--2 cm. Perianth white, occasionally dark reddish adaxially, (0.9--)1.2--1.5(--2) cm; tube 3--6(--9) mm, not constricted; lobes suboblong, (2--)8--10(--12) × 3--5 mm. Corona lobes usually opposite perianth lobes, rarely alternate to them, lanceolate to linear-lanceolate, 3--4(--5) mm, membranous, apex deeply 2-cleft into lobelets. Anthers attached usually at corona lobelet sinus, rarely at corona lobe sinus, suboblong-lanceolate, 1.5--3 mm. Ovary subglobose, 3--5 mm. Style (1.5--)2.5--3.5(--5) mm. Berries dark purple or brown-purple at maturity, subglobose, rarely slightly depressed, 4--10 mm in diam., 1--3-seeded. Fl. Apr--May, fr. Nov--Dec. 2 n = 40*.
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A herb that keeps growing from year to year. It is 20-40 cm high. The rhizomes or underground stems are cylinder shaped and 5-10 mm across. The stems are mottled purple. The flowers are white.
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