Acknowledgments -' 



■ For otter American material I am indebted to Prof. W. Trelease, ^'ho kindly sent 

 for examination the Herbarium of the Missouri Botanic Gardens; also to Mr J. B. 

 Ellis Prof G. P. Clinton, Prof. L. H. Pammel for the Erynphaceaem the Ilerbarmm 

 of the Iowa State Agricultural College ; and to Prof. B. T. Galloway for 150 speci- 

 mens, many of great interest from the Herbarium of Ihe United States Department of 

 Agriculture. These latter are now deposited in the Royal TIerbarmm,_ Ivew 



Mr.-David Griffithskindly sentme alarge collection (over 100 spec.mens) gathered 

 in South Dakota, Wyoming and Montana ; these also are now placed m the Koyal 



tlGronrium Iv cw 



AI P.Hariot courteously sent me on loan the Erydphaceae contained in the Paris 



Museum. This collection is of great interest, as it includes Montague's I'erbanum. 

 which was examined by Leveill6. In this herbarium are about 25 specmiens of \\ all- 

 roth's (determined by Leveill6 ; see 214, p. Il5); 33 specimens from Levedle s herba- 

 rium ; and numerous specimens from Castagne and other authors. . ,, . r 



To Prof. W. Tranzschel I am indebted for the loan of a representative collection ot 



Russian Erysiphaceae'. . . , 



Prof Kingo Miyabe sent a large and extremely valuable collection, accompanied 

 by notes of Japanese specimens. This contained several species not hitherto recorded, 

 from Asia, and included two new species and one new variety. The spec.mens are de- 

 posited in the Royal Herbarium, Kew. , ,. c r- -Kt ,^, :n 

 I have to thank Prof. T. M. Fries for the loan of the collection of Erystphaceae m 

 the Upsala Museum, containing those of Fries' herbarium ; Prof. L. Jost or the loan 

 of Duby's herbarium, and also specimens from Castagne, Xees von Esenbeck. e c con^ 

 tained fn the herbarium of the University of Strassburg ; M. Casimir de Cando lie fo 

 specimens from De Candolle's herbarium ; Prof. E. Fischer for Ott's ^^^^" ^^^ 

 University of Berne ; Prof. E. Baroni for the collecrion in the Florence Musum(.hich 

 contains 18 specimens from L.veill.'s herbarium) ; Prof. A. Fischer de ^V^ ^heim o 



■ 111- r i\^^ c;f Pf-ter^hurcr Botanic Gardens; 1 rot. C Oodi 



the specimens in the herbarium of the ^t- Pe'e-bur JoU ^^^ 



for those in the herbarium of the University of St. 1 etersbur^, ana i roi j 



his collection of Swedish Erydphaccae. H;a,^rv^ for 



I wish also to thank the authorities at the British Museum (Natural History) for 



giving me every opportunity of studying the collection of Erysiphaceae in this herba- 



I am also much indebted for specimens, in some case types, to the f°";j"S ^^^^^^^ 

 Dr. W. J. Beal, Prof. C. E. Bessey. Abbe Bresadola, Prof. J^ ^-niess Piof- ^ H' 

 Delogne Rev. C. H. Demetrio, Prof. A. Macacsy Diete Prof, ^'^/^--f -' ^^^^ 

 B. D. Halsted, Dr. H. W. Harkness, Prof. A. S. Hitchcock, Mr. E^W D^ M 



.ay, Prof. A. Jac.ew.ski, Prof. H. O. Juel^ Pro. W^^^^^Xf.L^::!:, 

 Prof. G. Lagerheim, Prof. D. Mc Alpine, Prof. T. H. Mcbrme, iro :, 



Prof. E. Palla, M. N. Patouillard, Prof. E. P.que. Prof. C H- Peck. 1^™^- O- Penzig, 

 Dr. H. Rehm. Prof. E. Rostrup, Prof. A. D. Selby. Prof. A. B. Seymour, Rev. A. C. 



^^^^^-™^ and Prof G. Marshall W-^- , ^^^^ p ^ S^^^,,,,, ,1, p. Sy- 



Ihaveespecally.to thank Prof. F. Magnus, rrm. x , , ^i_ r^^ 



dow, and Prof L. M Underwood, not only for several valuable specimens, but also for 



information siven on several points. . , . . „,.^ 



To Mr. George Massee for his constant advice and kind assistance m many .ays, 



I wish to express my most sincere tlaanks. 



ri um . 



