• 86 — 
P. physodes f. subisidioides Merrill f. nov. 
Like depressed conditions of the type, but interruptedly isidio-furfur- 
aceous. 
On rocks and old logs. 
3635, Laggan, Alta. ; 687, Elbow River, Rocky Mts. J. Macoun. 
P. physodes var. enteromorpha (Ach. ) Tuck. Syn. Lich. N. E. p. 28. 
P. enteromorpha Ach. Methodus, p. 252. 
On trees. 
695, Hastings, B. C. ; 689, Victoria, B. C. ; 688, 692, 693,694, Vancouver 
Is. J. Macoun. 
P. physodes enteromorpha f. rugosa Merrill f. nov. 
Differs from var. enteromorpha in being constipate-rugose, somewhat 
flavescent in color and with the laciniae more or less black-edged as in var. 
vittata. 
On decayed wood. 
696, McLeod’s Lake, B. C. J. Macoun. 
Comparable with P. lugubris Pers. in Gaudich. Uran. p. 196, which 
Nylander Syn. p. 401 cites as a form of var. vittata. The specimen fruited, 
the apothecia attaining to 3 cent, in diameter. While specimens of P. 
physodes are often found with wrinkled or rugose thalli, that character is 
more infrequent in var. enteromorpha than in the other forms. 
P. physodes var. vittata Ach. Methodus p. 252. 
On earth. 
588, Vancouver Is., J. Macoun, sub-nodulose and intermediate with var 
enteromorpha; 698, St. Paul’s Is., Behring Sea, J. M. Macoun, denigrate and 
suggests P. austerodes Nyl. The specimens of var. vittata from the west 
coast of America contained in our herbarium are for the most part inter- 
mediate states uniting the characters of both vars. enteromorpha and the 
present There seems to be no good reason for making a species of vittata 
notwithstanding asserted minute differences. 
P. physodes vittata f. hypotrypodes Nyl. in Flora 1875, p. 106. 
Differing but little from var. vittata except in being more divided with 
the laciniae less linear. In typical examples the lobes at and sometimes 
superficially near the apices are provided with conspicuous white- dilated 
soredia. 
On rocks, trees and mosses. 
669, Lake Nipissing, Ont. ; 612 694, St. Anne’s des Monts River, Que., 
J. Macoun; 617, Lake Mistassini N. E. T. , J. M. Macoun. 
Our examples are without the perforations of the European forms and 
the apices of the laciniae do not gape as in forma labrosa of the type. It is 
probable that most of the forms identified as var. vittata and cited from 
eastern N. America may be placed here. 
P. pertusa (Schrank.) Schaer. Lich. Helvet. Spiclg. II. p. 457. 
Reaction Ki, Cl. 
On old logs and trees. 
