170 MIDDLESEX FLORA. 



P. murorum, (Hoflm.) DC. 



Waltham. 

 P. cinnabarrinum, (Ach.) Anz. 



Newton (T. P. Adams). 

 P. aurantiacum, (Lightf.) Naeg. & Hepp. 



Waltham (C. J. Sprague) ; Natick, Sherboru. 

 P. cerinum, (Hedw.) Naeg & Hepp. 



Waltham, Natick. 

 P. ferrugineum, (Huds.) Hepp., var. Pollinii, Tuck. 



Natick. 

 P. vitellinum, (Ehrh.) JSTaeg. & Hepp. 



Waltham, Natick. 



Lecanora, Ach., Tuck. 



L. rubina, (Vill.) Ach. 



Cambridge, Watertown. 

 L. muralis, (Schreb.) Schaer., var. saxicola, Schaer. 



Cambridge, Waltham. 

 L. pallida, (Schreb.) Schaer. 



Waltham, Natick, Sherborn. 

 L. subfusca, (L.) Ach. 



Waltham, Natick, Sherborn. 

 L. badia, (Pers.) Ach. 



Waltham. 

 L. varia, (Ehrh.) Nyl. 



Waltham, Natick, Sherborn. 

 L. pallescens, (L-) Schaer. 



Sherborn. 

 L. tartarea, (L.) Ach. 



Medford, Natick, Sherborn. 

 L. verrucosa, (Ach.) Laur. 



Waltham. 

 L. cinerea, (L.) Sommerf. 



Cambridge. 

 L. Bockii, (Fr.) Th. Fr. 



Waltham (C. J. Sprague) . 



EiNODiNA, Mass., Stizenb., Tuck. 



R. oreina, (Ach.) Mass. 



Waltham . 

 R. constans, (Nyl.) Tuck. 



Natick. 



Pertusaria, DC. 



P. multlpuncta, (Turn.) Nyl. 

 Waltham. 



