14 . ELEMENTARY. BOTANY 
CHAPTER [11 
| BUDS | 
Plumule, the | HE plumule is the first bud. As soon as the 
First Bud. plumule has begun to appear above the cotyledons, 
if it is cut lengthways through the middle and examined with 
a hand lens, it will be seen to consist of a central portion, the 
stem, and of lateral outgrowths, the leaves. 
All buds consist of : (1) This stem-like portion ; (2) leaves. 
Thus a bud is the germ of a shoot. 
The stem portion of the bud 
isvery short, and the leaves are 
crowded together. The part of 
the stem from which the leaves 
come is called the node (Latin 
nodus, a knot), and the part be- 
tween the leaves the internode. 
Apical The stem of a 
Buds. plant always ends 
in a bud—the apical bud; 
here the nodes are very close 
together and the internodes 
_. short. As the stem grows, the 
Hie. 16.—Sucrion or Axinzary nodes become further apart, 
Bun. 
ov on ea Oe to the growth in length 
foliage leaves, of the internode. 
~  ayinary Other buds arise in the angle which the leat 
Buds. makes with the stem, #2. in the axil; these are, 
therefore, called azillary buds. A section through an axillary 
bud shows, asin the plumule, stem and leaves. If all these buds 
developed, then wherever there was a leaf there would be a 
branch; but a great many of them remain dormant. Sometimes 
an axillary bud, which has been dormant for a long time, may 
form a branch in order to replace one which has been injured ; 

