134 METROPOLITAN PARK FLORA. 
P, obscura (Ehrh.), Nyl. 
On trees; common. M* and BB*. 
Var. endochrysea, Ny]. 
On trees; rare. BB*. 
UMBILICARIA, Hoffm. 
U. Dillenii, Tuck. 
On rocks; common. M* and BB*. 
U. pustulata (L.), Hoffm., var. papulosa, Tuck. 
On rocks; common. B*, M* and BB*. 
STICTA, Schreb. 
S. pulmonaria (L.), Ach. 
On trees; common. B*, Great:Blue Hill: — U*. 
PELTIGERA, Willd. 
P. horizontalis (L.), Hoffm. 
Onearth. M*. 
P. rufescens (Neck.), Hoffm. 
Onearth. M*. 
P. canina (L.), Hoffm. 
Onearth. M*. 
LECANORA, Ach. 
L. varia (Ehrh.), Ny]. 
On trees. BB*. 
RINODINA, Mass. 
R. oreina (Ach.), Mass. 
On rocks. BB*. 
PERTUSARIA, DC. 
P. multipuncta (Turn.), Nyl. 
On trees. BB*. 
STEREOCAULON, Schreb. 
S. paschale (L.), Fries. 
On rock. M*, rather a small form. 

