iv BULLETIN OF THE UNIVERSITY OP WISCONSIN. 



eral years ago, and requests for copies of it were being re- 

 ceived continually. (2) It will be several years before the 

 new Manual of North American mosses can be com- 

 pleted, and much information is needed to make critical 

 study for that work possible. (3) A very large number of 

 new species have been described since 1890, about which 

 it is especially desirable to have more accurate information. 

 I was fortunate in being able to associate with me in this 

 work Mr. Fred D. Heald, sometime fellow in botany in the 

 University of Wisconsin, who has prepared the first draft 

 of the revision. Of some particular parts of the work for 

 which credit is due him I shall speak later. 



COLLECTED DESCRIPTIONS. 



Comparatively few who would be glad to collect and 

 study mosses have access to the various publications in 

 which the species new to our flora have been described. 

 We have thought it best, therefore, at the risk of adverse 

 criticism, to append to the keys collected descriptions of 

 all species not found in Lesquereux and James' Manual. 

 For the specialist this may be looked upon as wasted 

 energy; but these keys are prepared chiefly for amateurs, 

 who will doubtless be glad to have these descriptions 

 brought to hand. 



The source of the descriptions reprinted in the Appendix 

 is always cited. The descriptions are not always the orig- 

 inal ones, though generally they are if the species is one 

 recently named. We have not thought it necessary in other 

 cases even to cite the original description which can be 

 found readily from the clue given. 



KINDBERG'S NEW SPECIES. 



A great number of new species have been described by 

 Dr. N. C. Kindberg, of LinkOping, Sweden, and by Dr. C. 

 Mtiller, of Halle, in collaboration with Kindberg, from the 

 collections brought together by John Macoun, botanist of 



