collection of paintings of fungi, also in my library, numbers about three 

 hundred and is one of its most valuable assets. Exsiccati number about two 

 thousand. 



An interest in lichens was stimulated three years ago by our zealous 

 collector and able systematist, Prof. Charles C. Plitt, on the occasion of some 

 botanical trips about Baltimore. Here, too, the literature being rich and 

 often well illustrated, I began collecting available books and monographs and 

 securing exsiccati as offered. The catalogue exhibits my available resources 

 in this field in the way of literature — books and pamphlets. The lichen 

 exsiccati have been secured in part through the kindly cooperation of Prof. 

 M. Fiinfstiick of Stuttgart and Prof. A. Zahlbruckner of Vienna. Additions 

 have also been made by that veteran collector of mosses and lichens, Severin 

 Eapp, of Sanford, Florida. 



My library herewith catalogued now numbers between seven and eight 

 thousand titles, including books, pamphlets, articles, reprints, and all impor- 

 tant papers in the serial journals where much of the critical literature of the 

 world often lies buried. Many of the desiderata have been secured through 

 the personal interest and efficient cooperation of eminent book-men at home 

 and abroad. First I must mention with gratitude the friendship and aid of 

 Henry S. Young of Liverpool, who has constantly placed his life-long experi- 

 ence and imsurpassed judgment at my disposal in this as well as in various 

 other fields. H. Kirke Swann, eminent ornithologist and collector, of London 

 has aided materially from time to time, also Dulau and Company. On the 

 continent, I owe much to Paul Lechevalier of Paris and to Martinus Nijhoff 

 of The Hague. In this country, I am chiefly indebted to Alfred Hafner of 

 the firm of Gustav Stechert, as well as to H. C. Fiedler of New York City, 

 and from time to time to S. N. Ehoads of Philadelphia who has a fine flare 

 for rarities. 



To recapitulate, the library and collections contain : ( 1 ) over seven 

 thousand individual titles of papers and books covering pretty thoroughly the 

 literature of the larger fungi, lichens, and myxomycetes, with scattering 

 volumes on algae; (3) L. C. C. Krieger's key of some four hundred thousand 

 cards, covering authors, genera and species, subjects, and geographical data, 

 opening up the literature of the world for immediate reference; (3) three 

 hundred or more water-colors from nature by Krieger; (4) about seven 

 hundred species on three hundred and one plates in original water-colors in 

 one large volume by L. D. de Schweinitz; (5) Mcllvaine's original paintings 



