GRAY'S BOTANICAL TEXT-BOOK 



CONSISTS OF 



VOL. I. STRUCTURAL BOTANY. By ASA GRAY. 



II. PHYSIOLOGICAL BOTANY. By GEORGE L. GOODALE. 



III. INTRODUCTION TO CRYPTOGAMIC BOTANY, BOTH 



STRUCTURAL AND SYSTEMATIC. By WILLIAM G. 

 FARLOW. (In preparation.) 



IV. SKETCH OF THE NATURAL ORDERS OF PH^ENOGAMOUS 



PLANTS ; their Special Morphology, Useful Pro- 

 ducts, &c. (In preparation.) 



