298 Lichenes of New England. 
rocks. White Mountains. Acharius distinguished 
his Liehen glaber from the form which constituted 
Linneus’s Lichen polyphyllus, making the latter a 
variety of the former. They are not now kept sepa- 
rate, and Hooker has restored to the species the name 
given by-Linnzus. $ 
Crerrarta Islandica, Ach., E. T. Enum. l c. 1 
found this, the last year, in fruit, abundantly, in the 
alpine regions of the White Mountains. ,This is a 
very rare state of the plant in temperate countries. 
Our plant is smaller than the boreal form of the lich- 
en, but it does not appear to‘ differ in any other re- 
spect. This lichen seems to be very: generally dif- 
fused, and may be regarded common: I am acquaint- 
ed with the plant in the following stations: — White 
Mountains; Chin of Mansfield, Camel’s Rump, and 
other of the Green Mountains, Vt.; Lynn hills; 
Newton hills ; and Ipswich, Cambridge, and Water- 
town, in sandy fields. Also Hingham, Mr. Russell ; 
New Haven, Conn., Nuttall; and. Adirondack Moun- 
tains, New York, Mr. Madii. It is also enumerated 
in the Catalogues of Muhlenberg, and Torrey, and 
in the Flora of Michaux. . - 
C. Ee Ach. var. y. crispa, Ach. Syn., 
Scher.! l. e. 'egions of the White Mountains 
Summit of the Camel’s Rump, Vt. A delicate, crisp 
ed, alpine form. — 
C. cucullata, Ach., E. T. Enum. l.c. Imet with 
this finely in fruit, the last season, on the White 
~ 
Mountains ; a state of the plant very uncommon in | 
this latitude. The species is characterized by Acha- — 
e 
