7. Solanum nigrum Linnaeus, Sp. Pl. 1: 186. 1753.
龙葵 long kui
Solanum nigrum var. atriplicifolium G. Meyer.
Herbs annual, erect, 25-100 cm, pubescent with simple hairs, unarmed. Stems often angular, sparsely pubescent. Petiole 2-5 cm; leaf blade ovate, 4-10 × 3-7 cm, pubescent or glabrescent, base cuneate, decurrent, entire or coarsely dentate, apex obtuse. Inflorescences extra-axillary umbels; peduncle 2-4 cm. Pedicel 0.8-1.2 cm. Calyx cup-shaped, 2-3 × 2-3 mm; lobes subdeltate, 0.5-1 × 1-1.5 mm, pubescent abaxially, ciliate. Corolla white, 8-10 mm; lobes ovate-oblong, 4-5 × 3-3.5 mm, pubescent abaxially, ciliate, spreading. Filaments 1-1.5 mm; anthers oblong, 2.5-3.5 mm. Style 5-6 mm. Fruiting pedicel strongly deflexed; fruiting calyx applied to berry. Berry dull black, globose, 8-10 mm in diam. Seeds discoid, ca. 2 mm in diam. Fl. May-Aug, fr. Jul-Nov.
600-3000 m. Fujian, Guangxi, Guizhou, Hunan, Jiangsu, Sichuan, Taiwan, Xizang, Yunnan [India, Japan; SW Asia, Europe]
The name Solanum nigrum has been commonly used to include many distinct but similar species, and more than one taxon may be represented in the material treated here under this name.