Herbs, perennial, 20-40 cm tall. Root woody. Basal stems yellow, woody, with ribs; apical stem bright green; internodes 6-7 cm. Stipules herbaceous, connate basally on stems, semirotund and 2-3 mm, distinct apically on stems, triangular-ovate and 1-2 mm. Leaves with 2 leaflets; petiole 0.8-2 cm; leaflet blades, obliquely oblong to ovate, 1-2.5 cm × 6-10 mm, apex obtuse. Flowers axillary, paired. Pedicel 6-10 mm, slender. Sepals 5, unequal in size, smaller one 6-8 × ca. 5 mm, larger one ca. 5 × 4 mm, ovate. Petals white but orange at base. Stamens 1-1.2 cm; appendages narrowly oblong, 3-4 mm. Capsule nearly globose, ca. 1 cm, pendulous, narrowly winged. Fl. May-Jul, fr. Aug.
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