斑茎大黄 ban jing da huang

Herbs 50-80 cm tall. Stem erect, green, with dense purple-red spots, hollow, slender, 5-6 mm in diam. at base. Petiole of basal leaf slender, 14-18 cm, with purple-red spots; leaf blade reniform-cordate or broadly cordate, large, 18-28 cm, scarious when dry, abaxially with white hairs, adaxially glabrous, basal veins 5, base cordate, margin entire, apex acuminate. Stem leaf 1, at upper part; petiole 2.5-4 cm, nearly reniform, 4-9 × 4.5-11.5 cm, apex acuminate; ocrea ca. 1.5-2.5 cm, nearly glabrous, clasping. Panicle terminal, small, 7-8 cm, broad, few branched, with yellow hairs on peduncle. Pedicel linear, ca. 2 mm, jointed at base. Flowers small. Tepals 6, light red, orbicular, subequal, 1-1.5 mm. Stamens slightly longer than perianth; anthers purple, subglobose. Ovary broadly ellipsoid; style short; stigma inflated. Fl. Jun.

* Sichuan.