96 INTRODUCTION TO BOTANY 
The plumule (fig. 141) is the first terminal bud of the young 
seedling, Commonly the terminal bud is stronger than any of 
buds, that is, 
Fie. 79. Accessory buds a little 
buds of box elder outside of the 
A, face view of a sin- leaf axil, which 
Eagar rite may eitherstand 
accessory buds; B, above the axil- 
profile view of two lary bud, as in 
ORS ee butternut 
(fig. 78), or on either side.of it, 
as in the box elder (fig. 79). 
Adventitivus buds are those 
which spring, without any defi- 
nite order, from roots, stems, or 
leaves. These are often of great 
value in propagating plants by 
means of cuttings or layers. 
91. Bud position and branch- 
ing; form of trees. Plants with 
alternate leaves bear alternate 
buds, and those with opposite 
leaves bear opposite buds. If the 
buds develop into branches, their 
arrangement will of course fol- 
low the plan of the leaf arrange- 
ment. Figures 80 and 81 show 
the results of one year’s growth 
the lateral ones, and makes more rapid 
growth than they do. 
Lateral buds are usually avillary ; that is, 
they arise from the axil, or angle formed by 
the leaf with the stem, as shown in figure 
77, ar. Many plants also produce accessory 
Fic. 80. Alternate branching 
in seedling tree of cultivated 
crab apple 
of twigs from alternate and from opposite buds. Sometimes 
(fig. 81) the branch is terminated by a flower cluster. In this 
