" 



* 



PREFATORY NOTE. 



In the act of Congress making appropriation for the Department 

 of Agriculture for the fiscal year ending June 30, 1889, provision was 

 made for botanical exploration and the collecting of plants in little- 

 known districts of America, in connection with the United States 

 National Herbarium, and in the appropriation for 1891 additional 

 provision was made for the publication of reports. Since those years 

 similar provisions have been made annually. As a partial result of 

 these appropriations, the Department has issued heretofore five com- 

 pleted volumes— I, II, III, IV, and VI— of a series of publications enti- 

 tled Contributions from the United States National Herbarium. 

 Another volume, V, has now been brought to completion. 



Frederick V. Covtlle, 

 Botanist, II. 8. Department of Agriculture, 



Curator, I '. 8. National Herbarium. 



Washington, I). ('., October, 1901. 



