Trees, Shrubs and Vines 
count of plant structure is given at the end of the book. 
With those explanations and a little practice in the use 
of the Keys, the great majority of the following plants 
can be easily determined ; and even the expert botanist 
can more quickly identify these three sorts of growth 
(tree, shrub, and vine) by this method, than by the con- 
ventional analysis. 
It will be observed that only such details of the blos- 
som as can be seen without a microscope (with the single 
exception of the very minute blossoms of the dodder, 
of which only one species is widely prevalent in our ter- 
ritory) are referred to throughout this work. 
Length in feet and inches is indicated by the signs 
° and ’: thusa leaf 3’—6’ is three to six inches long; a 
shrub 5°—10° is five to ten feet high. Too much stress 
must not be laid upon a leaf’s dimensions, but the figures 
express the usual limits. The measurement does not 
include the s¢em# in compound leaves, nor in simple 
leaves when it is very long. p. means polypetalous. 
m. means monopetalous. ‘These terms are explained 
under Plant Structure. A scale of inches is often con- 
venient. 
ae 
Scale of inches. 
180 
