a aa i a ara i a i i i i i i a al i ke aN a ie a in a 

66 THE GROWTH AND PARTS OF PLANTS 
to the leaf. They are in pairs, in the same positions 
as the leaflets. Are they not leaflets which have 
changed in form to do a certain kind of work for the 
plant? Has the leaflet here given up its thin part and 
Fig. 98. Spiny leaves of barberry. 
kept the midrib, or vein, to 
do this new work? This 
part of the pea leaf is then 
under a mask, it is disguised. 
Masked leaves of the 
marrow or cucumber.  [x- 
amine the tendrils on a 
marrow or cucumber vine, or 
some one of their near rela- 
tives. Draw a cluster of 
tendrils and show how they 
are attached to the vine. 
Make a drawing of a leaf. 
Compare the two. Do the 
tendrils correspond to the 
large veins of the leaf? Did 
you ever find one of these 
which was part leaf and 
part tendril ? Snob leaves tell a very interesting story. 
Can you tell it ? 
Spine-like leaves. If there are barberry bushes 
growing in the garden, examine them. What position 
do the spines occupy? See the short, leafy branches 
