i8a FIELD COLUMBIAN MUSEUM BOTANY, VOL. i. 



A. aleuromela Nyl. mss. 



On bark of oak, alt. 2,000 ft. (Nuttall, discov. 1182). 



A. dispersa (Schrad.) Nyl. 



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



A. astroidea Ach. 



On bark of Liriodendron Tulipifera (Nuttall, 1816). 



A. punctiformis Ach. 



On bark (Nuttall, 1076). 



A. tsediosa (Nyl.) Fr. 



On bark (Nuttall, 1069). 



A. spectabilis Fl. 



On bark (Nuttall, 1025). 



AGYRIUM Fr. 

 A. rufum (Pers.) Fr. 



On smooth dead wood (Nuttall, 1814). 



CALICIACE.E. 



CALICIUM Pers. 

 C. subtile Fr. 



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



VERRUCARIACE^E. 



ENDOCARPON Hedw. 



E. miniatum (Linn.) Schaer. 



On wet cliffs (Nuttall, 1049). 



E. miniatum complicatum Schaer. 

 On wet cliffs (Nuttall, 1823). 



TRYPETHELIUM Spreng. 

 T. virens Tuck. 



On Ilex opaca (Nuttall, 1040). 



T. exocanthum Tuck. 



On Fagus atropunicea (Nuttall, 1181). 



PYRENULA Ach. 

 P. rhyponta Ach. 



On bark of Hamamelis Virginica (Nuttall, 1184). 



P. uitida Ach. 



On Betula lenta bark (Nuttall, 1027). 



P. pachycheila Tuck. 



On bark of Fagus atropunicea (Nuttall, 1048). 



