CONTENTS. 
CHAPTER I. 
List and description of the plants collected, by John Torrey, M. 1). 
CHAPTER II. 
Synoptical tables of botanical localities, by Thomas Antisell, M. D 
CHAPTER III. 
Description of the plates, by John Torrey, M. D. 
LIST OE PLATES. 
Plate I. 
Plate II. 
Plate III. 
Plate IV. 
Plate V. 
Plate VI. 
Plate VII. 
Plate VIII. 
Janusia Gracilis. 
Styphonia Integrifolia et var. serraisi, 
Dalea Spinosa. 
Hosackia Puberula. 
Olneya Tesota. 
Aplopappus spbserocephalus. 
Menodora scabra. 
Centrostegia Thurberi. 
