i82 Field Coi.umuian Museum — Botany, Vol. i. 



A. aleuromela Nyl. mss. 



On bark of oak, alt. 2,000 ft. {Nu/ta//, discov. 11 82). 



A. dispersa (Schrad.) Nyl. 



On bark of young Tsuga Canadensis, etc. {^Nuttall, 1142). 



A. astroidea Ach. 



On bark of Liriodendron Tulipifera {Nuttall, 18 16). 



A. punctiformis Ach. 



On bark {Nuttall, 1076). 



A. taediosa (Nyl.) Fr. 



On bark {Nuttall, 1069). 



A. spectabilis Fl. 



On bark {Nuttall, 1025). 



AGYRIUM Fr. 

 A. rufum (Pers.) Fr. 



On smooth dead wood {Nuttall, 181 4). 



C A L I C I A C E ^. 



CALICIUM Pers. 

 C. subtile Fr. 



On sticks, dead leaves, etc., under cliff {Nuttall, 1226) 



VERRUCARIACE^. 



ENDOCARPON Hedw. 



E. miniatum (Linn.) Schaer. 



On wet cliffs {Nuttall, 1049). 



E. miniatum com.plicatuin Schaer. 

 On wet cliffs {Nuttall, 1823). 



TRYPETHELIUM Sprenf. 

 T. virens Tuck. 



On Ilex opaca {Nuttall, 1040). 



T. exocanthum. Tuck. 



On Fagus atropunicea {N^uttall, 1181). 



PYRENULA Ach. 

 P. rhyponta Ach. 



On bark of Hamamelis Virginica {Nuttall, 1184). 



P. nitida Ach. 



On Betula lenta bark {Nuttall, 1027). 



P. pachycheila Tuck. 



On bark of Fagus atropunicea {Nuttall, 1048). 



