14 SACCARDO, PECK, TRELEASE 



quent rainfall favors the development of moulds, mildews, pileate 

 fungi, and other moisture-loving forms, while the fogs and mists 

 of parts of the upper coast are no less favorable to their growth, 

 and the vast amount of putrescible vegetable material in these 

 districts affords them abundant food. The phanerogamic vege- 

 tation of Alaska, moreover, is large and varied, notwithstanding 

 the high latitude of the country, and as there appears little a 

 ■priori reason to expect these higher plants to be much less 

 liable to the attacks of parasites here than elsewhere, a large 

 number of parasitic species is to be looked for. 



Occasional collections of fungi were made by several mem- 

 bers of the Harriman Alaska Expedition, and in addition to the 

 material so gathered, the phanerogamic collections were sub- 

 sequently examined for parasitized leaves and other organs, 

 and such earlier material as exists in the herbarium of the 

 Missouri Botanical Garden was also similarly gone over. The 

 result was the accumulation of some hundreds of specimens, 

 representing everything from bulky bracket fungi to sterile leaf 

 spots. As was to be expected, much of this material was either 

 valueless or indeterminable, but it has all been subjected to 

 examination, and on it, with reference to the earlier literature 

 concerning Alaska, the following catalogue is based. 



At first a list of the Uredineae, some few of which Professor 

 J. C. Arthur subsequently examined, and some other things, was 

 prepared by the writer ; then a considerable number of pileate 

 species, determined by Professor C. H. Peck, were included. 

 Professor T. H. Macbride determined the only Myxomycete 

 collected, and Professor P. A. Dangeard added determinations 

 of three forms parasitic in Spirogyra. The residue, a large 

 and very heterogeneous mass, was then submitted to Professor 

 Saccardo, who, with the assistance of Abbe G. Bresadola for 

 Hymenomycetes, and Dr. G. Scalia for many of the microscopic 

 forms, succeeded in determining from it something over 150 

 species or varieties, a considerable number of which, as well 

 as a few of those studied by Professor Peck or the writer, are 

 described as new. The responsibility for the present list is, 

 therefore, so divided as to suggest the authorship indicated at 

 its head, though if the entire material had passed through Pro- 



