Description from Flora of China
Datura stramonium var. tatula (Linnaeus) Torrey; D. tatula Linnaeus.
Herbs or subshrubs, sometimes robust, 0.5-1.5 m tall, glabrescent. Petiole 3-5.5 cm; leaf blade broadly ovate, 8-17 × 4-14 cm, membranous, glabrescent, base asymmetric, cuneate, irregularly sinuous or dentate-lobed, apex acuminate, veins 3-5 pairs. Flowers erect. Pedicel 5-12 mm. Calyx tubular, 5-angular, 3-5 cm. Corolla white or pale purple, greenish at base, sometimes purple distally, funnelform; limb 3-5 cm in diam.; lobes 6-10 cm, mucronate at apex. Filaments ca. 3 cm; anthers 3-4 mm. Capsules erect, globose or ovoid, 3-4.5 × 2-4 cm, with copious prickles, rarely smooth, dehiscent by 4 equal valves, subtended by remnants of persistent calyx. Seeds black, ovate or discoid, ca. 4 mm in diam. Fl. Jun-Oct, fr. Jul-Nov.
Cultivated in gardens as a medicinal and decorative plant.
The whole plant is toxic and is used medicinally as anaesthetic and for sedating and relieving muscular spasm. Seed oil can be used for soap making.
Near houses, roadsides, grasslands; 600-1600 m. Throughout China [native of Mexico, now worldwide]