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PASTORAL AND AGRICULTURAL BOTANY 



Flax (Linum usitatissimum). The bast fibers in the stem of the 

 flax are used for the making of linen fiber. 



Hemp (Cannabis sativa). This plant is cultivated in Europe, Asia 

 and the United States for the valuable bast fibers of its stem, which are 

 made into cordage. 



Jute (Cor chorus capsularis and C. olilorius). This plant is grown in 

 Asia for the fibers obtained from its stem by retting. 



Ramie (Boehmeria nivea). The fibers of the stem are usually obtained 

 in China by a slow and expensive extraction by hand. 



FIG. 97. Garden asparagus (Asparagus officinalis). A, young shoot or "spear"; 

 B, thick, fibrous roots and young shoots arising from "crown." (Robbins.) 



Rubber (Hevea brasiliensis). This the Para rubber tree is cultivated 

 in some tropical countries for its latex, or milky juice, which is converted 

 into rubber. 



Castilloa elastica. A tree of Central America yields Panama rubber 

 and the guayule (Parthenium argentatum) is a desert shrub of Mexico 

 from which rubber has been extracted. The Assam rubber is obtained 

 from a tropical fig (Ficus elastica) much cultivated indoors in temperate 

 climates for its foliage. 



Cinchona (Cinchona calisaya). The bark of this tree yields quinine. 



