248 ` Lichenes of New England. 
Lepraria in this vicinity, three of which answer gene- 
rally to L. flava, Ach., Hook., on old rails; L. alba, 
Ach., Meth., on. trees; L. cinéreo-sulphürea, Flórke, 
Ach., Scher.! Hook., on sandy banks, Cambridge; 
and thé other on trees, undetermined; but I do not 
venture to say with confidence that either of these spe- 
cies is eoreeetly referred. 
Unei iia scrupósa, Ach. Meth., Scher. ! Hook. 
Cambridge and Watertown, not common; on rocks, 
and on the ground in sandy soils. The remarkable 
5 bryóphila, Ach., Meth., Scher., (U. bryóphila, Ach. 
Lich. Univ., Gyalécta bryóphila, Ach. Syn.) mentioned 
by Muhlenberg, is the only form of Urceolària, akin to 
this, that I find in any of our catalogues. 
U. cinérea, Ach. Meth., Scher. ! Hook., Halsey. 
Cambridge, old stone walls; common. There is 
probably one other form of Urceolaria in this. vicinity, 
with the last. The genus is not mentioned in the Pine 
sachusetts catalogue. aa 
Lzcrpza obscuràta ? Scbier: r (oe. in- Lich. Helv., 
sine desc.). Rocks on the peak. of Mount Washington. 
I suppose Schzrer’s name will be allowed on the au- 
thority of his specimen ; though I do not know that any 
description of the lichen has been published. It is a 
very obscure plant, presenting nothing to the naked eye, 
but somewhat immersed, black patellule. The thallus, 
often: exanceoentty: is smooth, and of a yellowish brown 
color. . 
L; synóthea, dolis ‘Syn., Borr. in E. Bot. to Viik: 
‘Hook. Old squared rails and posts, Corti = A very 
