LEAVES 
they succeed each other along a single stem like a feather, as in 
the Poison Sumach, they are said to be pinnate. A simple leaf 
has no leaflets, though it may be so deeply cut that the lobes 
Fig. 5 
Fig. 6 
Fig. 7 
Fig. s shows the arrangement of the leaves on an upright branch of a certain 
shrub. 
Fig. 6 shows leaves on a dependent branch of the same shrub. 
Fig. 7. an enlargement from Fig. 6. shows that the arrangement in line is due to the 
twisting of every other pair of leaf-stalks. 
Fig. 8 
Fig. 9 
Fig. io 
EALMA.TELY COMPOUND PINNATELY COMPOUND DOUBLY COMPOUND 
{C2over) (Poison ■Sumach'^ ij^arly Neadow Parsnip) 
suggest leaflets. If in doubt whether we have to do with simple 
leaves or with leaflets of a compound leaf, the question can be 
decided by noticing how the leaf -stalks spring from the main 
xiv 
