Disporum ovale Ohwi, Bot. Mag. (Tokyo) 45: 385. 1931; Prosartes ovalis (Ohwi) M. N. Tamura.

Rhizome elongate, slender, ca. 2 mm thick. Stem sometimes branched distally, ± flexuous, 20--45 cm, pubescent. Leaves oblong, ovate-lanceolate, or ovate-elliptic, 4--11 × 2--4 cm, thinly papery, base cordate, margin ciliate-denticulate, apex long acuminate. Flowers (2 or)3 or 4 in a terminal, umbel-like inflorescence, suberect; pedicel 1.5--3 cm, pubescent. Tepals white, spotted with purple, ovate-lanceolate, 8--9 × 2--3 mm, apex cuspidate-caudate. Filaments ca. 3 mm; anthers elliptic. Ovary globose, winged along angles. Style 3.5--4 mm, much longer than ovary; stigma distinctly 3-lobed. Berry 2- or 3-seeded. Seeds suborbicular, furrowed. Fl. May, fr. Aug.

Tamura (in Kubitzki, Fam. Gen. Vasc. Pl. 3: 171. 1998) included this species in the American genus Prosartes D. Don. Further studies are needed in order to ascertain whether this species should be included in Prosartes or Streptopus.

Forests. SW Liaoning [Korea].