PP hese Oh ey NTL Re Re aR ee SP 
CONTENTS. 
1. REPORTS FOR THE YEAR 1900: — 
, a. Report of the Officers of the Board . - » © © © s © + 7 
b. Twelfth Annual Report of the Director... - «+ «+ + + 12 
2. SCIENTIFIC PAPERS: — 
a. A disease of the black locust (Robinia Pseudacacia, L.).— 
By Hermann von Schrenk «© «© + + «*+ # 6 « 21 
b. Crotons of the United States. — 
By A. M. Ferguson. «© «© © + © © © © © es 33 
c. An undescribed Agave from Arizona. — 
By J. W. TOMO e ee ee es sw OB 
d. A cristate Pellaea. — 
By William Trelease . ER pe ERO Rs 4 
e. A Pacific-slope palmetto. — 
By William Trelease . . «© © © © © © © @ *& 79 
f. Garden beans cultivated as esculents. — 
By H. C; Trish . . . . . - . . . e . cn . 81 
