GRAY'S BOTANICAL TEXT-BOOK 



CONSISTS OF 



VOL. I. STRUCTURAL BOTANY. By ASA GRAY. 



II. PHYSIOLOGICAL BOTANY. By GEORGE L. GOODALE O 



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- 

 duets, &c. (In preparation.} 



