. Textbook of pastoral and agricultural botany, for the study of the injurious and useful plants of country and farm. -jfem Fig. gt.—Medianlengthwise sectionof common onion bulb. {Robbins.) 228 PASTORAL AND AGRICULTURAL BOTANY Flax {Linum usitatissimum).—The bast fibers in the stem of theflax are used for the making of Hnen fiber. Hemp {Cannabis saliva).—This plant is cultivated in Europe, Asiaand the United States for the valuable bast fibers of its stem, which are made into cordage. Jute (Cor chorus capsular is and C. oliior ins).—This plant is grown inAsia for the fibers obtained from its s
. Textbook of pastoral and agricultural botany, for the study of the injurious and useful plants of country and farm. -jfem Fig. gt.—Medianlengthwise sectionof common onion bulb. {Robbins.) 228 PASTORAL AND AGRICULTURAL BOTANY Flax {Linum usitatissimum).—The bast fibers in the stem of theflax are used for the making of Hnen fiber. Hemp {Cannabis saliva).—This plant is cultivated in Europe, Asiaand the United States for the valuable bast fibers of its stem, which are made into cordage. Jute (Cor chorus capsular is and C. oliior ins).—This plant is grown inAsia for the fibers obtained from its stem by retting. Ramie {Boehmeria nivea).—Tht fibers of the stem are usually obtainedin China by a slow and expensive extraction by Fig. 97.—Garden asparagus (Asparagus officinalis). A, young shoot or spear;B, thick, fibrous roots and young shoots arising from crown. {KoDOtns.) Rubber {Hevea brasiliensh).—This the Para rubber tree is cultivatedin some tropical countries for its latex, or milky juice, which is converted into rubber, Castilloa elastica.—A tree of Central America yields Panama rubberand the guayule {Parthenium argentatum) is a desert shrub of Mexicofrom which rubber has been extracted. The Assam rubber is obtainedfrom a tropical fig [Ficus elastica) much cultivated indoors in temperateclimates for its foHage. _ Cinchona {Cinchona calisaya) .—Tht bark of this tree yields quimne. nitrogen-consuming plants 229 Le.^ Crops Cabbage {Brassica oleracea var. capitata).—The leaves of the wildplant from the seashore of southwestern Europe are enlarged and massedtogether to form a head. Kale and Collard (Brassica oleracea var. viridis).—Collards aremuch grown in the south particularly Georgia. The st
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