CHAPTER II 
LEAVES 
8. Arrangement.—Leaves appear upon the stems at 
definite regions called nodes (joints); and this jointed 
structure of the stem is one of its characteristic features, 
although it is much more conspicuous in some plants than 
Fic. 1.—Leaf arrangement: A, spiral or alternate -eaves; B, opposite (cyclic) 
leaves; C, whorled (cyclic) leaves.—After Gray. 
in others. In certain plants only one leaf appears at each 
node; and if an imaginary line be drawn connecting the 
points on the nodes at which successive leaves appear, it 
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