STEMS. Aq 
This arrangement will not usually be perfectly carried out, 
since some of the buds may never grow, or some may grow 
much faster than others and so make the plan of branching 
less evident than it would be if all grew alike. 
62. 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 arrangement 
(Fig. 25), is more commonly met with in 
trees and shrubs than the opposite arrange- 
ment. It admits of many varieties, since 
the spiral may wind more or less rapidly od 
round the stem. In the apple, pear, L 
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, Fig. 77. : 
63. Growth of the Terminal Bud. — 
In some trees the terminal bud from the 
very outset kgeps the leading place, and yo 
the result of %his mode of growth is to 
produce a slender, upright tree, with an 
excurrent trunk like that of Fig. 26, II. 
In such trees as the apple and many 
oaks the terminal bud has no preémi- 
nence over others, and the form of the yy6.95. Alternate Branch- 
tree is round-topped and spreading, deli- 8 : avery Young, APPIe 
quescent like Fig. 26, I. 
Most of the larger forest trees are intermediate between 
these extremes, like Fig. 27. 
which Miss Newell suggests. If the supply of material is abundant, the twigs 
employed in the lessons above described need not be used further, but if material 
is scanty, the study of buds may at once be taken up. 
