SYSTEMATIC AND ALPHABETIC INDEX OF NEW SPECIES OF 

 NORTH AMERICAN PHANEROGAMS AND PTERIDOPHYTES, 

 PUBLISHED IN 1891.* 



Compiled hy J(.)si;riii\K A. Clakk. 



The increasing interest whicli is to-day manifested in systematic Lot- 

 any demands some method of indexing- wliich will brin^- together iii 

 eonvenient form the infortnation necessary to a complete history of the 

 investigations and diseoveri(;s which ha\e been made in this line of 

 researeli. In the EotaTiieal Division of the U. S. l>e])a.rtment of Agri- 

 enlttire a carefully made card index is kept, in wliieli all new spe<'ies 

 and new combinations are recorded. It is thought best to j)ublish 

 this index which has been found so us<'ful in our work, omitting the 

 synonomy and making no attempt to pass judgment upon the value of 

 any species. In other woi'ds, it is simi>ly a record of the work ac- 

 complished during the yeai' in tins biie, and designed in printed form 

 to be a convenience to monograplicrs and others in their investigation*. 

 To make this list still more, useful, in cases of new s])ecies, tlie State 

 or region of the country in which they are found is given. A double 

 enumeration of the spetiies is made, viz, systematic and alphabetic. 

 In the former arrangement Durand's Index Generum I'hanerogamoium 

 has been followed for convenience, this being the arrangement adojjted 

 in the ^"ational Uerbarium. In thecaseof the revival of an old generic, 

 name in place of the one now in use tlu' name will be found under the 

 genus, as given in Durand's irulex; also when an author has substituted 

 a new gencMic name for an old one it will be found under the latter.. 

 Where a genus has been transferred by an author to a different family 

 from that commonly accepted it will be ])laced under both families. A 

 new genus lias, inclosed in brackets, the nundxu- of the genus it- 

 naturally follows, with the letter a ad<led, the number under which it is 

 found in the National Herbarium. 



The author of the species, ])lace of publication, with volume and page, 

 and, as stated above, in cases of new species the locality are given. 



* It is our purpose to pul)li8h an anunal index, and also to complete an index now 



in preparation, covering preceding? years baek to 1885. That futuro issues of tlie 



index may l)e as complete as possible, it is desired that authors will send reprints or 



reviews to the National Herbarium of such of their publications as may not be 



readily accessible. The accompanying carefully prepared systematie and al])ha- 



betic lists have been made under the mwediftte direction oJf m.y assistant, Mr. J. N. 



Jlose. — George Vasey, JJotanint. 



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