Contents 



Introduction — 



How to Use the Keys ------- ix 



The Names of Plants ------- xiv 



Pronunciation - _______ X v 



Verification and Determination of Specimens xv 



Explanation of the Chart - — - - - - xv 



Chart of Evolution and Relationship - xvii 



Vegetation Regions - - - - - - - xviii 



Vegetation Map -------- X x 



Key to the Genera - - - - - - - -n 



Flower Key to the Families ------ 16 



GYMNOSPERMS --------- ig 



Pine Order --------- 19 



Ginkgo Order --------- 43 



ANGIOSPERMS --------- 44 



Buttercup Order --------44 



Pink Order --------- 51 



Mallow Order --------- 70 



Geranium Order -------- 80 



Heath Order - -------- 84 



Phlox Order --------- 106 



Gentian Order --------- 107 



Snapdragon Order - - - - - - - -116 



Rose Order - - - - - - - - -118 



Bittersweet Order -------- 194 



Maple Order --------- 215 



Carrot Order --------- 270 



Madder Order --------- 275 



Aster Order --------- 297 



Lily Order ----------298 



Glossary ___-----_- 303 



Index ______----- 309 



