2 "iced Dia ba tyes i ARE ATE CE 
ERA 
Lichenes of New England. 457 
tance that appeared in this country, and though prob- 
ably it ean hardly be otherwise than incomplete, 
when the extent of the region of country is consid- 
ered, and certainly is deficient in our New England 
Alpine lichens, yet I believe no other lichenist has 
made so large an enumeration, or indicated so many 
new species. Some of these last are described by 
Acharius in his * Synopsis,” (cited by Halsey,) and 
of many Sprengel has given descriptions. And they 
may also be found described in.the sixth edition of 
Eaton's * Manual." Muhlenberg's “ Catalogue ” was 
followed in 1819, by that of Professor Torrey, in his 
“Catalogue of the Plants of New York." In this 
enumeration, —— species are given, with their com- 
mon stations. In 1823, Mr. Halsey's very valuable 
* Synoptical View of the Lichens of New York ” 
was published in the * Annals of the Lyceum." In 
this work, which must be regarded as the most com- 
plete view of the species of a particular district 
which has been given by any of our writers, more 
than 170 species are enumerated, 9 of which are 
given as new. Brief characters are added, and the 
common stations. Professor Hitchcock's ‘ Catalogue 
of the Plants of Massachusetts," appended to his ** Ge- 
ologieal Report," contains 116 species, including a 
number from Dr. Porter. And the invaluable works 
of Sir William Hooker, on the “Flora of Boreal 
America," contain, besides a general survey of the 
. lichens of that region, and descriptions of new spe- 
cies, many remarks illustrative of the economy and 
the uses of these plants. 
But this very imperfect sketch of some of the sys- 
