- Scientific Name: Solanum americanum Miller
- Ref: Gard. Dict., ed. 8. no. 5. 1768.
- English Common Name: American black nightshade
- Chinese Common Name: 少花龙葵 shǎohuā lóngkuí
- Family: Solanaceae
- Genus: Solanum
- Distribution: Waste places, roadsides, fields; 100-2000 m. Fujian, Guangdong, Guangxi, Hainan, Hunan, Jiangxi, Sichuan, Taiwan, Yunnan [widespread in all tropical and temperate regions]
Herbs annual or short-lived perennial, glabrescent or puberulent with simple hairs. Stems green or purple, mostly erect, 25-100 cm tall. Petiole 1-2 cm; leaf blade ovate, 4-8 × 2-4 cm, membranous, glabrescent or sparsely pubescent, base truncate to cuneate, margin entire or sparingly dentate, apex acute. Inflorescences extra-axillary, subumbellate, 3-6(-l0)-flowered; peduncle 1-2.5 cm. Pedicel 5-10 mm. Calyx cup-shaped, 1.5-2 mm in diam., lobed nearly halfway; lobes ovate, pubescent abaxially, ciliate. Corolla white, rarely bluish or purplish, sometimes with a yellow eye, 3-5 mm, lobed halfway or more; lobes ovate-oblong, 3-4 mm, pubescent abaxially, ciliate. Filaments short, ca. 0.5 mm, puberulent; anthers 1-1.5 mm. Fruiting pedicel erect or nodding; fruiting calyx strongly reflexed. Berry shiny black, occasionally ripening green, globose, 5-8 mm in diam. Seeds discoid, 1.5-2 mm in diam. Fl. Jun-Oct, Fr. Jul-Jan. (Flora of China)