104 Tiiskerin i Fnumerátión; &c. 
importance, whether we follow Meyer in considering them 
abortive apothecia, or Fries, as analogous rather to the glom- 
erules of Sticta glomerulifera. They are said to occur on 
other species, and I have found them more than once on the 
American plant. "There is a smaller, thicker, glaucous form of 
our lichen in the alpine region, very much resembling a state 
of the species which occurs at the Cape of Good Hope. 
Apothecia at first patelliform, then plicate, and finally lirellif- 
erous. The U. pustulata of Michaux is not this species, 
with which his description very ill agrees, but U. Pennsylva- 
nica; as I ascertained by examining the original specimen, in 
his herbarium. 
O»zcnarna atra, Pers. Fries Lich. p. 367. — Smooth bark; 
not uncommon. 
Caricom subtile, Pers. Fries Lich. p. 388. — Dead trunks 
from which the bark has fallen; common at the White 
Mountains. 
C. trachelinum, Ach., Fries Lich. p. 390. — Decayed naked 
J wood, with the last; White Mountains. 
Epnese pubescens, Fries. Cornicularia, Ach. Meth.— 
. Rocks now and then moistened by water. By some con 
sidered a true Alga, and by others a Lichen, Fries arranges 
es production as a distinct genus of his order Byssace®: 
I have not found the apothecia. | 
ge "E * * 
Ant. VIL — CHARACTERS OF SOME NEW GENERA AND SPECIES 
OF PLANTS OF THE NATURAL ORDER COMPOSITE, FROM THE 
ROCKY MOUNTAINS AND UPPER CALIFORNIA. By Asa Gna, M. D: 
Tue plants here described are selécted from a collection 
made by Lieutenant Fremont, of the United States "Tope 
graphical Engineers, during his recent exploring tour to the 
Rocky Mountains, Oregon, and the region that lies betwee? 
Upper California and the Rocky Mountains, a part of 
had never been visited by any scientific person. I shall not 
Led 
