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HOW PLANTS GROW, 
A SIMPLE INTRODUCTION TO STRUCTURAL BOTANY. 
WITH 
A POPULAR FLORA, 
OR AN ARRANGEMENT AND DESCRIPTION OF COMMON PLANTS, 
BOTH WILD AND CULTIVATED. 
ILLUSTRATED BY 500 WOOD ENGRAVINGS. 
By ASA GRAY, M.D., 
\i 7 
FISHER PROFESSOR OF NATURAL HISTORY IN HARVARD UNIVERSITY. 
THIRD EDITION. 
NEW YORK: 
IVISON AND PHINNEY, 
48 and 50 Walker Street. 
CHICAGO: 
S. C. GRIGGS & CO., 39 and 41 Lake Street. 
1 8 5 9 . 
