161 PEELIMINAEY CATALOGUE OF PLANTS. 



P. pertusa, Schner. 

 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. 



Vai: tribacia, Fries. 



Var. hispida, Fries. 

 P. obscura, (Ehrh.,) Nyl. 



Var. endoohrysea, Nyl. 



Var. adglutiiiata, Schrser. 

 P. pulverulenta, (Schreb.,) Nyl. 



Pyxine, Fries. 



P. cocoes, (Sw.) 



Var. sorediata, Tuck. 



Umbilioaria, HoiTm. 



U. Pennsylvanica, Hoffm. Sussex Co. 



U. pustulata, Hoffm. 



U. Dillenii, Tuck. Sussex Co. 



U. Muhlenbergii, Ach. 



Sticta, (Schreb.) 

 S. crocata, Ach. 

 S. quercizans, Ach. 

 S. pulmonaria, Ach. 

 S. amplissima, Mass. 



Nephroma, Ach. 



N. lasvigatum, Ach. 



N. tomentosum, (Hoffm.,) Kbr. 



N. Helveticum, Sohra^r. 



