What is the scientific name of this plant?

Rehmannia glutinosa, a perennial herb, is mainly cultivated. It is found in the field of hillside and roadside wasteland at an altitude of 50 ~ 1 100 m, so it is named Rehmannia glutinosa because its underground roots are yellow and white. Its root is one of the traditional Chinese medicines, which was first seen in Shennong Herbal Classic. Medicinal materials are divided into Radix Rehmanniae, Radix Rehmanniae and Radix Rehmanniae Preparata according to processing methods, and their medicinal properties and efficacy are also quite different. According to the efficacy classification of Chinese materia medica, fresh rehmannia glutinosa is a medicine for clearing heat and cooling blood; Rehmannia glutinosa is a tonic In addition, Rehmannia glutinosa blooms in early summer, with a large amount of flowers, red and purple, which has good ornamental value. Mainly distributed in China.

Born in sandy loam, barren slopes, foothills, fences, roadsides and other places at an altitude of 50- 1 100 meters.

Like warm climate, cold-resistant, suitable for planting in sunny, deep, loose, fertile, neutral or slightly alkaline sandy loam, binary soil and fertile clay can also be planted. Rehmannia glutinosa has strong adaptability, and it takes 150 ~ 160 days from planting to harvesting.

I like loose and fertile sandy loam. Red loam, yellow loam or paddy soil with high viscosity are not suitable for planting. Rehmannia glutinosa is a light-loving plant and should not be planted near the forest edge or intercropped with tall crops. When the soil temperature is 1 1 ~ 13℃, it takes 30 ~ 45 days to germinate, and 25 ~ 28℃ is the most suitable for germination. If the soil moisture is suitable in this temperature range, it will germinate one week after sowing and come out in 15 ~ 20 days. Rootstock can't germinate below 8℃.