Description from Flora of China
Herbs perennial, pubescent throughout. Stems caespitose, ascending, 40--60 cm tall, slender, sparsely branched. Leaves broadly ovate to narrowly lanceolate, 3--6 × 0.5--3 cm, both surfaces sparsely villous or at veins only, margin ciliate-scabrid, base subsessile or rapidly attenuate into short petiole, apex acute. Inflorescence a lax, many-flowered dichasium. Bracts lanceolate. Calyx campanulate, ca. 5 mm, glabrous or densely hairy, open at apex in fruit, longitudinal veins dark green; calyx teeth triangular-ovate, ca. 1 mm. Androgynophore obsolete to 1 mm, glabrous. Petal claws included in calyx, oblanceolate, glabrous, exauriculate; limbs exserted, white, bifid to middle. Stamens slightly exserted; filaments glabrous. Styles exserted. Capsule ovoid, ca. 5 mm, shorter or slightly longer than calyx. Seeds few, large, subglobose. Fl. Jul--Aug, fr. Sep--Oct.
Heilongjiang, Jilin, Liaoning [Korea].