Ramie.

China is the hometown of castor. Archaeological evidence, china as early as more than 5,000 years ago began to use castor weaving cloth sewing. Because its fiber is strong, has more luster than flax, and is rarely affected by moisture, fiber can be subdivided into the same thin as silk, so to the Tang Dynasty became the most important fiber plant.

the earliest into Korea, Japan, after the 18th century to Europe and the United States. Therefore, internationally called it "Chinese grass." China's castor production accounts for the world's first.

is a castor genus of castor, a perennal herb or shrub, 1-2 meters high. Most were born on the roadside, behind houses, ravines and other places, or home cultivation. Stems are multi-branched and dense and thick. Small green flowers in summer, male and female, conical flower sequence;

use of castor is extremely wide, hemp can be textile fine beautiful "shabu", wearing cool away from sweat. In the defense industry can make wings, parachutes, tents, rain cloth and so on. Hemp leaves can be used as feed. Hemp root and hemp can be used as raw materials for papermaking.

, the castor is cool, taste glycemic, is the traditional Chinese herbal medicine, has the effect of detoxifying the wind, hemostic pregnancy.