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Lichenes of New England. 297 
species from Gyrophora in the Methodus, and placed 
it with the Lecidez. It seems also to be the G. 
Pennsylvanica of American authors. But Sprengel's 
plant is described as reticulate on the under surface, 
and possessing apothecia * plerisque ' abortientibus 
gyrosis," — true gyromata. My G. Muhlenbergii is 
not so distinctly papulose as the former ; it is marked 
on the under surface with. “ridges, lacerated, and 
joining ends," and the granulation is interrupted and 
often obliterated.. The apothecia commonly occur in 
pits, or. depressions of the thallus; they are flattish, 
heaped, and often very large; and always perfect 
trice or gyromata. But the G. Muhlenbergii of 
Sprengel is described as lacunose, and with urceolate 
or very concave margined patellule ; a description, 
which, if I am not in- rin these remarks, ap- 
plies only to the former spec es. 
G. hyperborea, Ach. Meth., Lecidea polymorpha, 
z. Spreng. 1. c., Gyrophora ænea, y. hyperborea, Scher.! 
l. c., Gyromium hyperboreum, Wahlenb. Fl. Lapp., 
Lichen hyperboreus, Ach. Prodr., L. superf. subtus 
lacunata, L. Fl. Lapp. — Alpine rocks. . Rocky peaks 
of the. White Mountains, abundant (subtus rufa). 
Summits of the Chin of Mansfield, and the Camel’s 
Rump, Vt. (subtus nigra). Very. different from any 
of our common species, but ni to the next, 
with which Schærer has unit 
G. polyphylla, Hook. |. c., Leci 
Spreng. 1. c., G. ænea, a. Scher. ! 1. (s n 
polyphyllum, Wahlenb. 1. €., Gyrophora glabra, Ach. pa 
* Meth., Lichen glaber, Ach. Prodr., Umbilicaria poly- — . "i 
. phylla, Hoffm., Lichen u m s — Alpine 
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