. Class-book of botany: being outlines of the structure, physiology and classification of plants; with a flora of the United States and Canada. Botany; Plants; Plants. THE ROOT, OR DESCRIPTIVE AXIS. 2« continuing to advance, send down other roots, which in turn become columns similar to trunks, until a single tree becomes a grove capable of sheltering an army of men. 138. The Mangrove (Rhizopora), of the West Indies, sends down axial roots from its branches. The seed germinates before detached, sending down its long radical until it reaches the mud in which these trees grow. Thus the young pla
. Class-book of botany: being outlines of the structure, physiology and classification of plants; with a flora of the United States and Canada. Botany; Plants; Plants. THE ROOT, OR DESCRIPTIVE AXIS. 2« continuing to advance, send down other roots, which in turn become columns similar to trunks, until a single tree becomes a grove capable of sheltering an army of men. 138. The Mangrove (Rhizopora), of the West Indies, sends down axial roots from its branches. The seed germinates before detached, sending down its long radical until it reaches the mud in which these trees grow. Thus the young plants gain a firm standing before quitting their hold of the parent tree. 139. To FAVOR the DEVELOPMENT of adventitious ROOTS on any particular part, keep that part in contact with moist soil. V>'c often observe such roots to ariso naturally, in prostrate branches or stems, at those points which touch the ground. In slips, cuttings, &c, the same thing occurs artificiall)-. Hence to increase the roots of the potato vine, or corn, heap the earth against the stems. The madder plant, which is cultivated solely for the rich coloring matter in its roots, is success- fully treated in no other way. Its adventitious roots are excessively multiplied by deep epadiug and high " ; 140. To produce dwarf trees it is only necessary, by any contrivance, to re- tain a quantity of moist earth against the base of the selected branch until it strikes root. Afterwards it may be severed from the tree and transferred to the soil. (Fig. 40, d). 141. Axial and inaxial roots in agriculture. This distinction must never be lost sight of. The former strike deep, anchor firmly, and draw their nourishment from the lower strata of the soil. The latter abide near the surface, and feed upon the upper soil. Hence let us learu a. Which class of crops requires deep and which shallow tillage ; b. Which should succeed each other in the rotation of crops; c. Which may be sown together in the mi
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Keywords: ., bookcentury1800, booksubjectbotany, booksubjectplants, bookyear18
