161 PRELIMINARY CATALOGUE OF PLANTS. 



P. pertusa, Schraer. 

 P. physodes, Ach. 

 P. colpodes, Ach. 

 P. caperata, Ach. 

 P. conspirsa, Ach. 

 P. ambigua, Ach. 

 P. olivacea, Ach. 



Physcia, (D. C, Fries.,) Th. Fr. 



P. aquila, (Ach.,) Nyl. 



Var. detonsa, Tuck. 

 P. speciosa, (Wulf.,) Fries. 



Var. hypolenca, Ach. 



Var. galactophylla, Tuck. Ocean Co. 

 P. stellaris, (L.,) Nyl. 



Var. tribacia, Fries. 



Var. hispida, Fries. 

 P. ohscura, (Ehrh.,) Nyl. 



Var. endochrysea, Nyl. 



Var. adglutinata, Schrser. 

 P. pulverulenta, (Schreb.,) Nyl. 



Pyxine, Fries. 



P. cocoes, (Sw.) 



Var. sorediata, Tuck. 



Umbilicaria, Hoffm. 



U. Permsylvanica, Hoffm. Sussex Co. 



U. pustulata, Hoffm. 



U. Dillenii, Tuck. Sussex Co. 



U. Muhlenbergii, Ach. 



Sticta, (Schreb.) 

 S. crocata, Ach. 

 S. quercizrms, Ach. 

 S. pulmonnria, Ach. 

 S. amplissima, Mass. 



Nephroma, Ach. 



N. lsevigatum, Ach. 



N. tomentosum, (Hoffm.,) Kl>r. 



N. Helveticum, Schraer. 



