Rubus is a kind of fruit. It is a small deciduous tree, also called raspberry, with barbs on its branches and leaves. The flowers are white, 2.5-3 cm in size. The aggregate fruit fruit is spherical, red, purple and black, and its size is 1.5-2 cm. They are bright and red, sweet and sour like strawberries. They are a kind of fruit in the northeast of China, also called red berries and mulberries. In May and June, raspberries are usually used. Rubus is not bitter when ground into dry powder.