— 3i — 
L. pulmonaria (L.) Hoffm. On trees along the Bellowspipe Trail and at the 
summit. 
Lopadium pezizoideum (Ach.) Koerb. On balsams at the summit; determined 
by Mr. Merrill. [ Heterothecium pez- 
izoideum (Ach.) Flot.] 
Mycoblastus sanguinarius (L.) Th. Fr. On balsams at the summit, more com- 
mon than the preceding species; 
determined by Mr. Merrill. [Heter- 
othecium sanguinarium (L.) Flot.] 
Pannaria lanuginosa (Ach.) Koerb. 
Parmelia caperata (L.) Ach. On trunks of yellow birch and at the summit. 
P. cetrata Ach. On the trunk of a fallen butternut, Juglans cinerea , 
where the North Adams road enters the forest at 
the base of Mt. Williams. 
P. crinita pilosella (Hue) Merrill. On the trunk of the fallen butternut 
with the preceding species and 
elsewhere. 
P. dubia (Wulf.) Schaer. On yellow birch at the summit. ( Parmelia 
Borreri Tuck.) 
P. exasperata (Ach.) D. N. On balsams, mountain ash and yellow birch 
at the summit. ( Parmelia olivacea 
aspidota Ach.) 
P. olivacea (L.) Ach. Fruiting specimens on balsams and mountain ash 
at the summit. 
P. olivaria (Ach.) D. N. On balsams, yellow birch and mountain ash at 
the summit; determined by Mr. Merrill. 
P. perlata (L.) Ach. On balsam trunks. 
P. pertusa (Schrank.) Schaer. On balsam trunks. 
P. physodes (L.) Ach. On balsam trunks at the summit and at the camp- 
grounds in the Hopper. 
P. rudecta Ach. Fruiting specimens. 
P. saxatilis (L.) Fr. On balsams and mountain ash at the summit. 
P. sulcata Tayl. On the trunk of the fallen butternut at the base of Mt. 
Williams; also at the summit on balsams, yellow 
birch, and mountain ash. 
Pertusaria communis Lam. & DC. Determined by Mr. Merrill. 
P. globularis Ach. On balsams. 
P. globulifera (Turn.) Nyl. On balsam trunks; determined by Mr. 
Merrill. 
P. velata (Turn.) Nyl. On yellow birch; determined by Mr. Merrill. 
P. Wuljenii Lam. & DC. Determined by Mr. Merrill. 
Peltigera aphthosa (L.) Willd. 
P. canina (L.) Hoffm. 
Physcia aquila detonsa Tuck. On balsams. 
Platysma ciliare (Ach.) Nyl. ( Cetraria ciliaris Ach.) 
