Description

The leaves are arranged in whorls of three to six, lanceolate to obovate or elliptic in shape, 60300 mm (210 in) long and 30130 mm (15 in) broad, with an entire or spiny-serrated margin. The flowers are produced in a long, slender, simple raceme 50300 mm (210 in) long, the individual flowers 1015 mm (0.40.6 in) long, white to pink or purple, with four tepals. The fruit is a hard, woody, globose follicle with a pointed apex, containing one or two seeds. The nutshell ("coat") is particularly tough and requires around 2000 N to crack. The shell material is 5 times harder than hazelnut shells and has mechanical properties similar to aluminum

Peanut by-products, such as peanut hulls, peanut stems, and leaves, etc., contain large amounts of dietary fiber, but they are often directly discarded or burnt as fuels, which pollutes the environment and wastes resources. The diet has been focused on plant-based foods for a long time, so people have a low demand for additional dietary fiber and the research, development, and utilization of dietary fiber is far behind that of developed countries. However, with the improvement of peoples living standards, the diet of people is gradually changing, with a substantial increase in the intake of high-fat and high-calory foods, such as meat, eggs, and dairy products.