176 FIELD COLUMBIAN MUSEUM BOTANY, VOL. i. 



PARMELIE^:. 



PARHELIA Ach. 



P. perlata (Linn.) Ach. 



On Acer rubrum, and on sandstone boulders (Nuttall, 848). 



P. Borreri Turn. 



On oak, alt. 1,850 ft. (Nuttall, 1032). 



P. BORRERI RUDECTA Tuck. 



On Robinia Pseudacacia, Monongalia Co., along Falling Run 

 (Millspaugh, 1531). 



P. colpodes (Ach.) Nyl. 



On oak, alt. 1,850 ft. (Nuttall, 1141). 



P. OLIVACEA (L.) Ach. 



On Liriodendron log newly felled, Monongalia Co., Falling 

 Run (Millspaugh, 1343). 



P. CAPERATA (L.) Ach. 



Monongalia Co., on sandstone rocks, and base of beech, Fall- 

 ing Run (Millspaugh, 1283). 



PHYSCIA DC. 

 P. LUCOMELA (L.) Michx. 



Mercer Co., with moss on wet limestone ledge, Beaver Spring 

 (Millspaugh, 1539). 



P. ciliaris (Linn.) DC. 



On mossy sandstone rocks (Nuttall, 1063). 



P. ciliaris crinalis Schaer. 



On moss, alt. 1,850 ft. (Nuttall, 1042). 



P. aquila (Ach.) Nyl. 



On rocks and on moss (Nuttall, 1035). 



P. stellaris (Linn.) Tuck. 



On sandstone rock (Nuttall, 872). 



P. stellaris aipolia Nyl. 



On sandstone rock (Nuttall, 1778). 



UMBILICARI^E. 



UMBILICARIA, Hoffm. 

 U. Dillenii Tuck. 



On sandstone rocks (Nuttall, 823). 



U. Pennsylvanica Hoffm. 



On sandstone rocks (Nuttall, 849). 



TJ. pustulata (Linn.) Hoffm. 



On faces of sandstone cliffs (Nuttall, 855). 



