241 
C. arctica Hook. 
C. oaontella Ach. 
C. Fendlert Tuck. 
C. commixta Nyl. 
Thallus clear bright brown to fuscescent, smooth, irregularly 
laciniate, divided; laciniae erect, much entangled, plane, the mar- 
gins not elevated, apices obliquely furcate, uniform in color, be- 
neath paler; apothecia reddish brown, disk rugose, margin granu- 
lose ; spores simple, hyaline, oblong, — mic. 
C. Fahlunensts (L.) Schr. 
C. Istandica (L.) Ach. 
Var. crispa Ach. 
Var. Delisaei Borr. (C. htascens Th. Fr.) 
C. ciliaris Ach. 
C. lacunosa Ach. 
C. nivalis Bell. 
C. aureus Tuck. 
C. glauca (L.) Ach. 
Var. fusca Fl. Thallus brown and dark. 
C. juniperina L. 
Var. Pinastri Ach. 
Var. serrestris Schr. 
C. saepincola Ehrh. 
C. saepincola var. chlorophylla Wahl. 
Evernia Ach. 
E. prunastri (L.) Ach. 
Usnea Ach. 
U. barbata (1..) Fr. 
Var. ceratina Schr. 
Var. jirta Fr. 
F. strigosa Ach. 
Var. florida Fr. 
F. glabrescens Nyl. 
Var. dasypoga Fr. 
Var. plicata Fr. 
U. longissima Ach. 
U. trichodea Ach. 
U. cavernosa Tuck. 
