Tiii PREFACE. 



terbarium tmder Hs control ; wMle Br. T, Johnson has rendered us- 

 similar service in connection with the library and collections in his 

 keeping in the Dublin Science and Art Museum. For notes supplied 

 and for assistance given us ia many other ways we are also indebted 

 to Mr. R. M, Barrington, of Eassaroe ; to 8ir F. W. Brady, Bart. ; 

 to Mr. F. W. Bwrlidge, curator of the Botanic Garden of Trinity 

 CoUege, Dublin ; to Mr. O. S. Ca/rpenter, of the Science and Art 

 Museum ; to Miss M. Chea/rnley, of Cappoquin ; to the late Mr. F. E, 

 Cwrrey, of Lismore ; to the R&«. C. F. d^Arcy, of BaUymena ; to- 

 Mr. J. S. BoAiies, of Lisbum ; to the Rev. W. W. Flemyng, of Port-" 

 law "Waterford; to M. Michel Oandoger, of Arnas, Villefranche ; 

 to the Rev. T. Sartley, of Borris, Carlow ; to Mrs. M. E. Joyce, of 

 St. Cleran's, Craughwell; to Miss Kindhan and to Miss A. O. 

 Kinahan ; to the Rev. S. W. Lett, of Aghaderg ; to Miss Manders ; 

 to Mr. P. B. C Kelly, of BaUyvaughan ; to Mr. R. Lloyd Praeger ; 

 to Mr. R. P. Vowell, and to the Rev. C. S. Waddell, of 

 Saintfield. 



Nor are our thanks exclusively due to Irish botanists. Assistance 

 in many ways has been given us by English correspondents as 

 well. More especially are we under obligation to Mr. Arthur 

 Bennett, of Croydon, whose unwearied courtesy, under what we fear 

 must have been rather importunate demands on his leisure, we 

 cannot too warmly acknowledge. But for the information freely 

 supplied by him, and which he alone of all British botanists was in 

 "a position to supply, it would have been impossible for us ta 

 institute, on recent and trustworthy data, those comparisons on 

 various points between the English and Irish floras which we hope 

 will be found to add to the interest of our Introduction. Mr. James 

 Britten, of the British Museum, has kindly given us extracts from 

 some of the earlier botanical works not readily accessible in Dublin 

 and from the manuscripts of Eobert Brown in his possession ; the 

 Rev. E, S. Marshall has commimicated to us some notes on the 

 flora of South "Wexford ; the Rev. W. Moyle Rogers has permitted 

 us to make use of many unpublished localities for the Irish Rubi ; and 

 Messrs. H. and J. Groves have given us their assistance in deciding 

 some points of difficulty in the genera Callitriche and Zannichellia, 



