HOW TO USE THE CHARTS 
Example I 
To cite first an extremely easy case, suppose we find, but 
cannot identify, the red Wood Lily (Fig. 2). Turning to the 
red chart, we read at the top, " First note whether plant falls 
in Class I, II, or III, then follow out to right. When a group- 
number is reached, turn to page indicated and look through 
the group." 
Under Class I we find " Plants with leaves opposite," under 
Class II " Plants with leaves whorled," under Class III " Plants 
with leaves otherwise." The leaves of our plant are whorled, 
so we stop at Class II. Following this out to the right we find 
" Group II, p. 290." Turning then to page 290 we find that the 
description of the first flower in the group corresponds with that 
of our specimen. Indeed, a glance at the three illustrations on 
the opposite page satisfies us at once that the Wood Lily is our 
flower. 
Example II 
To take a less simple case, let us suppose that we are un- 
familiar with the Dandelion (Fig. 26) and wish to identify it. 
It is obviously yellow; we turn, therefore, to the chart for yellow 
and yellowish flowers. Following the directions at the top of 
the chart we first see whether the plant falls into Class I, II, HI, 
or IV, namely: 
I. Plants with leaves opposite. 
II. Plants with leaves whorled. 
III. Plants with leaves neither opposite nor whorled. 
IV. Plants with no leaves. 
