. The essentials of botany. Botany. GBOSS ANATOMY OF FLOWERINQ- PLANTS. XV others which have annual stems have liennial or perennial roots. In shrubs and trees the roots are of course perennial. Many root- lets, however, even in trees and shrubs die off in the autumn, and new ones are produced in the spring. Branching.—The branching of roots is usually very irregular. Where roots are branched, the main root is called the primary root, while its branches are secondary roots. In examining the branches of roots, notice that they spring from beneath the sur- face of the main root. In this they dif
. The essentials of botany. Botany. GBOSS ANATOMY OF FLOWERINQ- PLANTS. XV others which have annual stems have liennial or perennial roots. In shrubs and trees the roots are of course perennial. Many root- lets, however, even in trees and shrubs die off in the autumn, and new ones are produced in the spring. Branching.—The branching of roots is usually very irregular. Where roots are branched, the main root is called the primary root, while its branches are secondary roots. In examining the branches of roots, notice that they spring from beneath the sur- face of the main root. In this they differ from the branches of stems. In stems the surface of the main stem is continuous with that of its branches, but in roots the surface is broken at the points where branches emerge. § 3. The Leaf. Position on the Stem.—Leaves grow upon the stem in several ways. In some cases they are scattered (or altertutte) (Fig. VII);. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Bessey, Charles E. (Charles Edwin), 1845-1915. New York : H. Holt and company, ;
Size: 1564px × 1597px
Photo credit: © The Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1890, bookpublisher, booksubjectbotany
