Li 
a 
Aes 
 Lichenes of New England. 439 
"T'ugrorREMA lepadinum, Ach. Meth. p. 132., Li- 
chenogr. p. 312. (cum Ic.) Schar.! Lich. Helvet., 
Moug. & Nestl.! Stirp.. Crypt., Wallr. Fl. Crypt. 
Germ., Hook.! Br. Fl, Antrocarpum inclusum, 
Spreng. Syst., Endocarpon inclusum, Wahlenb. F], 
Suec., Volvaria truncigena, De Cand. Fl. Fr., Lichen 
lepadinus, Ach. Prodr. L. inclusus, Sm. Eng. Bot. 8., 
n. 89. (cum Ic.)— Old trunks. Our plant agrees 
with the above-cited specimen from Hooker, in the 
herbarium of Mr. Greene, and also with the other 
foreign specimens, This species is mentioned in Mr. 
Halsey's * View," as common; but with a mark of 
doubt, and an intimation that his lichen is * probably 
new." The plant of my list seems to be very rare, 
and I suppose, is not the same with that of Halsey. 
Lrcipg'A incána, Hook. 1, c., Patellaria incana, 
Spreng. l. c., Lepraria incana, Ach. Meth. p. 4., Li- 
chenogr. p. 665., Moug. & Nestl.! I. c., Wahlenb. FI. 
Lapp., Muhl. 1. c. Torr. l. c., Lichen incanus, Schreb., 
Byssus ineana, L.— Moist rocks in mountain forests. 
At the Floom, in Lincoln, N. H., plentiful. The 
discovery of perfect patellule on this plant in Britain, . 
caused its removal from the Leprarem. It is of a 
remarkable byssus-like habit, and I have seen no 
lichen resembling it, unless it be Parmelia lanugino- 
sa; which has however a rigid thallus, the surface 
only being like our plant. Specimens occurred at 
the above station, in regard to which I am unable to 
determine whether they are fragments of Parmelia, 
inerusted with our Lecidea, or the Lecidea itself in 
its mature state. In the latter case the plant is a 
