. Essentials of botany. Botany; Botany. 52 ESSENTIALS OF BOTANY grow much faster than others and so make the plan of branching less evident than it would be if all grew alike. 67. Alternate Branching. — In trees like the beech the twigs will be found to be arranged in a more or less regular spiral line about the branch. This, which is known as the alternate arrafigement (Fig- 25), is more commonly met with in trees and shrubs than the opposite ar- rangement. It admits of many varieties, since the spiral may wind more or less rapidly \^ round the stem. In the apple, pear, cherry, poplar, oak, a
. Essentials of botany. Botany; Botany. 52 ESSENTIALS OF BOTANY grow much faster than others and so make the plan of branching less evident than it would be if all grew alike. 67. Alternate Branching. — In trees like the beech the twigs will be found to be arranged in a more or less regular spiral line about the branch. This, which is known as the alternate arrafigement (Fig- 25), is more commonly met with in trees and shrubs than the opposite ar- rangement. It admits of many varieties, since the spiral may wind more or less rapidly \^ round the stem. In the apple, pear, cherry, poplar, oak, and walnut, one passes over five spaces before coming to a leaf which is over the first, and in doing this it is necessary to make two complete turns round the stem. 68. Growth of the Terminal Bud In some trees the terminal bud from the very outset keeps the leading place, and Fm. 2u. Alternate the result of this mode of growth is to Branching in a very . ,.^ .,, Young Apple Tree. produce a slender, upright tree, with an excurrent trunk like that of Fig. 232. In such trees as the apple and many oaks the terminal bud has no preeminence. Fig. 24. Opposite Branch- ing in a very Young Sap- ling of 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 Bergen, Joseph Y. (Joseph Young), 1851-1917. Boston, Ginn
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