黄叶地不容 huang ye di bu rong

Deciduous and herbaceous vines. Stems slightly woody at base. Petiole subequal to or longer than leaf blade, often twining at base; leaf blade triangular-rounded to rotund, length and width usually 8-15(-20) cm, less than 8 cm when on lateral branches, papery, grayish yellow when dry, both surfaces glabrous, base subtruncate, rounded, or slightly emarginate, margin entire or irregularly repand, seldom horny on one side or both sides, apex mucronate or slightly obtuse, palmately 11-14-veined, slightly raised abaxially and bright yellow when dry. Inflorescences compound umbelliform cymes, axillary or on short axillary branches with reduced or no leaves; male peduncle usually longer than petioles, apex with few to 10 linear or sometimes foliaceous bracts; umbellet pedicels 5-12, 1.5-5 cm; cymelets many fascicled on end of umbellet pedicel, slightly condensed. Male flowers: sepals 6 in 2 whorls, greenish yellow, outer whorl elliptic or rhombic-elliptic, rarely obovate-cuneate, 2-2.2 × 1.4-1.6 mm, apical margin often involute, inner whorl similar, sometimes broadly obovate, to 2 mm wide; petals 3, thick, fleshy, orangish yellow, 1.1-1.2 × ca. 1.5 mm, margin with both sides involute, abaxially concave, with many verruculose or lobed processes, apex slightly emarginate; synandrium 0.5-0.7 mm. Female inflorescences condensed to capitula; peduncles usually much shorter than petioles, slightly stout; umbellet pedicel, cymelet pedicels, and pedicels very short. Female flowers: sepal 1, minute; petals 2, slightly larger. Drupes red, broadly obovate; endocarp 5-6 mm.

● Limestone hills. C and SW Guangxi, S Guizhou, SE Yunnan.

The huge, irregularly globose rootstock of Stephania viridiflavens contains abundant rotundine, which is used medicinally in Guangxi and Yunnan.