a ee 
212 Statistics of the Flora of the Northern States. 
the species here received, and give results quite incommeasurable : 
wit wn. I 
ts ag 
The numerical comparison of our Phenogamous with our 
Cryptogamous species, however interesting it might become in 
a complete flora, is here of little moment; only the higher Cryp- 
togamia being included. Moreover, it should be noted that the 
Musci and Hepatic enumerated in the above re 2 are those of — 
a geographical area about twice that of the higher or Acrogen- 
ous Cryptogamia and the Pheenogamia. For the distinguished 
American muscologist who elaborated these two orders for our — 
‘Botany of the Northern States,’ anxious to afford facilities for 
the study of our mosses throughout the country, has included all — 
known to him within the whole United States east of the Mis- — 
sissippi, and even some as yet found only to the north and west — 
of these limits. It is evident, also, that the number of forms — 
admitted as species is proportionally larger in these two orders — 
than in the rest of the work. On the other hand it is to be con- 
sidered how little our mosses have as yet been collected and — 
the 260 introduced species, most if not all of which have become 
denizens of our country since its settlement by Europeans, and 
in consequence of that settlement;—leaving the question of their 
origin, introduction, &c., for future consideration. Their admis« 
* Thus Mr. Watson, as cited by Alph. DeCandolle (Geogr. Bot, p. 511) enumet 
ates 602, out of 1428 phenogamous British plants, as common to Great Britain and 
America, I count only 321 out of 2091 p ies indigenous to the — 
Northern United States as indigenous also to Europe ao 
