EUROPE AND NORTH AMERICA. 5 
synonymy of each species, and all have been consulted as far as 
possible. 
Various Exsiccata have also been published, in which the 
Sphagna are more or less completely represented, but the speci- 
mens are not in all cases correctly named; my Sphaguacee 
Britannice Exsiccate will, 1 hope, remedy this, so far as the 
British species are concerned, as well as more effectually illustrate 
the forms described in the present work, though in this also a few 
errors have been detected, which will be corrected under each 
species described in the monograph. 
A work to comprise all the Belgian forms—Sphagnotheca 
Belgica, by M. Gravet—is now in course of publication, but I 
have not had the opportunity of consulting it; neither have 
I been able to inspect the various continental herbaria, and thus 
place on record a more complete list of foreign localities ; I have, 
however, made full use of the valuable papers published by 
Professor Lindberg, and gathered together stray notes met with 
in journals, in order as far as possible to extend our knowledge 
of the distribution of these plants. 
