Plants 30--55 cm tall. Rhizome brown, 7--8 × 1--1.3 cm. Leaves 4--6; petiole 2.5--4 cm; leaf blade ovate-oblong, 7--10 × 4.5--7 cm, base shallowly cordate or rounded. Peduncle 15--25 cm. Outer tepals 4--6, green, ovate-lanceolate, ca. 3 × 1 cm; inner ones yellow-green, filiform-linear, 5.5--6 cm × 1--2 mm. Stamens (2 or)3 × as many as outer tepals; filaments green, ca. 3 mm; anthers ca. 9 mm; free portion of connective ca. 1 mm, apex acute. Ovary green, subglobose, 4--6-loculed, 4--6-ribbed. Style short; stigma lobes 4--6, ca. 2 mm. Berry pale green, globose, indehiscent. Seeds many, yellow-brown, obovate, 1/2 enveloped by green-white, spongy aril. Fl. Apr--Jun, fr. Jul--Aug. 2 n = 10*.
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