The petiole is as long as 12 cm, and the stem leaves are similar to the basal leaves, but smaller. Flowers are small, bracts are small, oblanceolate to obovate, pedicels are slender, sepals are white, often lavender, narrowly oval, petals spoon-shaped, nearly as long as filaments;
Gracilaria ovata-oblong, with raised lateral veins on the surface, and oval seeds, which bloom in March-April and bear fruit in April-May. Distributed in southwest, east and northeast of China. Produced in Yuntai Mountain area and southern parts of the province; It is distributed in southern Henan and the middle and lower reaches of the Yangtze River.
Extended data:
Growth habit
Solanum nigrum is a cold-resistant and heat-resistant plant. The average temperature suitable for growth is 0 ~ 25℃, and the northern part of China is temperate, which can reach -40-(-30)℃ in winter, so the begonia cannot grow. The south is tropical and subtropical, and it is hot all the year round, and the sunflower is not suitable for growth.
Therefore, Solanum nigrum can only be distributed in the north subtropical zone in central China, along the Yangtze River valley, and Anhui is the northern edge of Solanum nigrum distribution. Like wet, often wild in low mountain roadside and open space shade. Avoid stagnant water, and cultivate in loam with good drainage, looseness and fertility.