Herbs annual or biennial, 50--100 cm tall, usually glabrous throughout, sometimes only shortly hairy at base. Stems erect, sometimes dark violet basally, robust, simple or sparsely branched. Leaves elliptic-lanceolate to ovate-oblanceolate or obovate-oblanceolate, 4--10(--16) × 0.8--2.5(--5) cm, base attenuate, apex acute. Flowers in an irregular thyrse. At least distal cymules without a stalk, proximal cymules rarely stalked. Pedicel erect, 5--18(--30) mm, usually glabrous; bracts narrowly lanceolate. Calyx ovoid-campanulate, 7--9 mm, glabrous, enlarged to 1--1.2 cm in fruit, veins green. Androgynophore very short or obsolete, glabrous. Petals included, white; claws oblanceolate, glabrous, auriculate; limbs ovate, bifid. Coronal scales small. Stamens and styles included. Styles 3. Capsule ovoid, 8--11 mm, shorter or longer than calyx. Seeds gray-brown, globose-reniform, ca. 1 mm, tuberculate. Fl. Jun--Jul, fr. Jul--Aug. 2n = 48.
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A herb that grows one or two years. It grows 50-100 cm tall. The stems are erect and sometimes dark purple at the base. It has a few branches. The leaves are narrowly sword shaped and 4-10 cm long by 1-3 cm wide. The flowers are in an irregular group.
Pebbly river banks, sandy and pebbly shores and shrub thickets. Mountain grassland and scrub throughout China; at elevations from 300-2,500 metres.
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It is a temperate plant. It grows in mountain grassland between 300-2,500 m above sea level.
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