INTRODUCTORY. 



Mr. Baker's ample and most interesting collection of the 

 year 1899 was made, as his own brief and pointed Itinerary 

 will indicate, along the borders of southwestern Colorado 

 and adjacent New Mexico. The field was one wisely 

 selected, as the large proportion of new plants obtained suf- 

 ficiently declares; while the great extent of the collection 

 shows how vast an amount of travelling and of other physi- 

 cal labor the zeal and industry of one strong and vigorous 

 young man can accomplish in a single season, and as it 

 were single handed. 



Our report upon this rich and beautiful collection will 

 constitute Volume II of the PLANTS BAKERIAN^E. The 

 material has, at this date, for the most part been quite care- 

 fully studied, and it is hoped that at intervals not widely 

 separated the succeeding instalments of the volume may 

 reach the hands of the subscribers to the sets. 



Inasmuch as this second volume will inevitably catalogue 

 many species that were reported in the first volume, the 

 names of such as are, as it were, duplicated in the collection 

 of 1899, will be printed in italics here, only such being ex- 

 cepted as were published as new in the first volume. The 

 names of these will be given in the usual small capital type. 



EDW. L. GREENE. 



Catholic University of America, 



Washington, D. 0., 11 March, 1901. 



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