长叶竹根七 chang ye zhu gen qi

Polygonatum laoticum Gagnepain; P. tonkinense Gagnepain.

Rhizome moniliform, 1--2 cm thick. Stem arching, (30--)60--100(--110) cm. Leaves alternate; petiole 5--8 mm; leaf blade lanceolate to elliptic, 10--20(--30) × 2.5--6(--10) cm, base cuneate-rounded to cuneate-obtuse, apex attenuate-acuminate. Bracts absent. Flowers in clusters of 5--10; pedicel 1.2--1.5 cm. Perianth white, 8--10 mm; tube 3--5 mm, slightly constricted near mouth; lobes narrowly elliptic, 4--7 × 1.6--4.5 mm. Corona lobes opposite perianth lobes, 1.5--2 × ca. 0.8 mm, fleshy, apex slightly emarginate. Anthers attached at hollowed point of corona lobe apex, oblong, 2.5--3 mm, base emarginate-cordate. Ovary ovoid, ca. 3 mm. Style 1--2 mm, base constricted. Berries white at maturity, ovoid-globose, 1.2--1.5 cm in diam., 2--5-seeded. Fl. May--Jun, fr. Oct--Dec. 2 n = 40*.

Forests, forest margins, thickets; 100--1800 m. Guangxi, S Yunnan [Laos, Thailand, Vietnam].