GRAY'S BOTANICAL TEXT-BOOK 



CONSISTS OF 



Vol. I. Steuctueal Botany. Bj- Asa Gray. 



II. Physiological Botany. By George L. Goodale. 



III. Introduction to Ceyptogamic Botany, both 

 Structural and Systematic. By William G. 

 Farlow. {In preparation.) 



rV. Sketch of the Natural Orders of PniENOGAMOus 

 Plants ; their Special Morphologj', Useful Pro- 

 ducts, &c. (In preparation.) 



