INTRODUCTIOIN^ 



TO THE SECOND VOLUME. 



1- After some delay arising from various causes, I 

 have the pleasure to present to the public the second 



and last Volume of my Medical Flora of the United 



States* 



2. It will be seen that although this second Volume 



has assumed somewhat a different shape, it has lost 



nothing by the change, but rather improved in matter and 

 value. 



3. The plan closely pursued in the first Volume was 

 that of Bigelow and Barton, with the improvements of 

 alphabetical order, separation and condensation of facts. 

 This plan was by no means the best, and limited very 

 much the number of medical selections. 



4. If I had pursued the same plan throughout, it was 

 my intention to have added afterwards a third Volume 

 or Supplement, including all the Medical plants omitted 

 by this mode, with tables of Equivalents and other need- 

 ful elucidations. 



5. By a trifling change effected in this Volume, I have 

 been enabled to comprise these additional Plants and re- 

 marks without further extension of the work. 



6. If I had followed my own inclinations at the out- 

 set, I might have included all our Medical plants in a 

 single thick Volume, and all the Figures in another Vo- 

 lume by itself, so as to answer still better the purpose of 

 Manuals. 



7. To render this Volume adequate to answer the 

 desirable purpose, it has been divided in two parts, the 

 first of which contains the selected Articles and Plants 

 that belong to the plan of the first Volume. 



8. While the second part shall include several other 

 selected plants and figures, united to a general account of 

 all our Medical plants and Equivalents, forming a second 



