PREFATORY NOTE. 
The importance to Nebraska botanical students of the paper entitled an 
“ Appendix to the Catalogue of the Flora of Nebraska," prepared by Mr. 
Herbert J. Webber, M. A., formerly assistant in botany in the University of 
Nebraska, now assistant in the Shaw School of Botany, St. Louis, warrants 
its republication by the University. It was published originally in the Trans- 
actions of the Academy of Science of St. Louis (Vol. VI., No. 1, March 12, 
1892.) The present edition differs from the first only in the correction of a 
few minor errors, and the rearrangement of the index. 
In his preface to the first edition Mr. Webber explains that '‘ the names of 
those reporting species follow in every case the name of the species reported 
as it occurs in the Appendix. The collector whose name follows the species, 
it must be understood, is to be taken as authority for its occurrence, as in 
many cases I have not had the opportunity to examine the specimens. Thus 
specimens here reported must be understood to be preserved in the herbaria 
of those reporting the species, or in the Herbarium of the University of Ne- 
braska.”’ 
, The ‘‘ Supplementary List" (p. 45 et seq.) includes all the species of plants 
added since Mr. Webber’s paper went to press. It consists mainly of the ad- 
ditions made by Mr. P. A. Rydberg, a graduate student, in his collecting tour 
through the western counties in the summer of 1891, with others made by 
members of the University Botanical department, and Dr. H. Hapeman of 
Minden, and Rev. J. M. Bates of Valentine. 
Specimens of nearly all the species reported in both lists, are deposited in 
the University Herbarium. 
It is hoped that the periodical publication of accessions to the flora of the 
state will stimulate botanical students to a closer study of our native plants, 
and encourage them to deposit specimens of newly discovered species in the 
University Herbarium. To this end correspondence is solicited by the Depart- 
ment of Botany. 
Address, DEPARTMENT OF BorTany, 
UNIVERSITY OF NEBRASKA, 
May 25, 1892 Lincoin, NEsR. 
