254 Lichenes of New England. 
Umbilicària of Hoffmann Mask. prior authority. "This 
last is adopted by Scherer, (see. Hook., but not in his 
. Lich. Helvet., at least not in the Cunibridgé copy.) and 
several otit; Without the works of Hoffmann, how- 
ever, we cannot expect to arrive at any satisfactory con- 
clusion. The genus being one of considerable interest, 
` Twill enumerate all the New England species in my 
herbarium, though it is an ape list even of the 
known species. 
1. G. proboscidea, Ach: Meth., Hook: G. poid 
8. Scher.,  Umbiliċària corrugàta, Hoffm. (sec. Ach. 
Meth.), U. congésta, Hoffm. (sec. Hook.); Lichen pro- 
boscideus, Ach. Prodr. Alpine rocks on the peak of 
Meme Washington. 
8. arctica, Ach., Hooks, G. polsat 
phi, a, Schme. l, y, arctica, pee Meth. (cum Ic). 
Mt. Washington with the last.. It will be recollected that 
the base of the peak of Mt. Washington, has an eleva- 
tion of about 5000 feet. The peak rises about 1200 
feet above this. It is composed of detached masses of 
naked mica-slate* rock, diversified only with here and 
there alittle patch of carices ot Diapensias, but every 
-— rich indeed. in matter for thé lichenist’s edjaye 
me 
2. 'G. Sire Mass. Cat. i. Mt. Washinton, with the - 
last. Also Cambridge, Ipae; on an old wall,) a and ex- 
Porter. , 
The MES A plant, and coe from the White Moun- 
tains, are identical with Dr. Porter’s, and agree very 
well with the original description i in Ach. Meth. They 
do not so well answer to ‘Hooker’s description of the 
.* Prof. Hubbard; Sill, Jour. xxxiv. 121. a 
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