280 MINNESOTA BOTANICAL STUDIES. 



XXII. A PRELIMINARY LIST OF THE 3I0SSES 

 OF MINNESOTA. 



John M. Holzinger. 



Prefatory note. In offering this preliminary list the 

 first aim is to stimulate all interested to more energetic 

 and systematic work. In view of this fact, the question 

 of nomenclature has been set aside for the present. In a final 

 paper on Minnesota Mosses, material for which has been col- 

 lected for a number of years, and is in process of preparation, 

 a number of changes will be made, principally under Barbula, 

 Cynodontium, Leptotrichum, Atrlchum, Eacomitrium, and Platygy 

 rium. Whether Encalypta, Mnium, Tet7'aphis, Webera, Weisia, 

 and some other generic names should be changed seems still 

 an open question. The able historical reviews under these sev- 

 eral generic names, by Limpricht, in his Laubmoose, command 

 the respectful attention of modern doctors of nomenclature. 

 So far the principal effect of this author has been to counter- 

 act the radical course of Lindberg in changing names, and to 

 base the procedure of making changes on a more conservative, 

 though still progressive basis. 



It is chiefly with a view to temporary convenience that the 

 writer has based his list on Musci Americae Septentrionalis by F. 

 Renauld and J. Cardot, 1898. The material which forms the 

 basis of this list was collected by the writer, unless otherwise 

 stated. In its elaboration, especially during the earlier years 

 of effort, invaluable aid has been rendered by counsel, verifi- 

 cation, correction, and determination of a large majority of the 

 species reported, by Professor C R. Barnes, of the University 

 of Wisconsin. Mrs. E. G. Britton, of Columbia College, has 

 kindly reviewed Lhe species of Orthotrichum. Mr. J. Cardot 

 has examined critically a number of Minnesota mosses, which 

 passed into his hands by exchange, and has kindly communi- 

 cated his determinations. He also determined Fontinalis. Dr. 

 Warnstorf determined the two species of Sphagnum. It is with 

 pleasure that the kind service of all these able bryologists is 

 here recognized. 



