**Solanum nigrum L.** – commonly known as black nightshade, wild grape, or Tianbao bean – is an annual herb belonging to the Solanaceae family. It is widely distributed across China and is considered a common weed that affects various crops such as cotton, legumes, potatoes, melons, and vegetables.
**Morphological Features:**
The seedlings of *Solanum nigrum* are hairless, with broad lanceolate cotyledons and primary leaves that are broadly ovate. The plant has an upright, branching stem that is smooth and can grow between 30 to 100 cm in height. The leaves are alternately arranged on long petioles, with ovate leaf blades that may be entire or irregularly undulate-toothed. Both surfaces of the leaves can be smooth or sparsely hairy. The inflorescence is an umbel-like cyme, with short, beak-like tips, and it grows axillary, bearing 4 to 10 white flowers. Each flower has pendulous pedicels, a cup-shaped calyx with five ovate-triangular lobes, and five stamens. The fruit is a spherical berry that turns black when mature, containing flat, nearly oval seeds.
**Ecological Characteristics:**
*Solanum nigrum* thrives in farmland and wastelands, preferring fertile soils that are slightly acidic to neutral. It typically emerges from May to June, blooms between July and August, and reaches maturity from August to October. After rainfall, its seeds germinate and give rise to new seedlings. This species is highly adaptable and often becomes a nuisance in agricultural settings due to its rapid growth and competitive nature.
Its presence in fields can reduce crop yields and may even pose a risk to livestock if ingested in large quantities. Despite its status as a weed, *Solanum nigrum* has also been used in traditional medicine for its potential medicinal properties. However, care should be taken, as some parts of the plant contain toxic compounds.
d-mannose food grade supplement,Pure d-mannose,3458-28-4,d-mannose
Jiangxi Chengzhi Bioengineering Co., Ltd , https://www.chengzhi-bio.com