132 CUMMINGS 



179. Parmelia olivacea (L.) Ach. 



Lichen olivaceus LINNAEUS, Sp. PI. 2 : 1143. 1753- 



Parmelia olivacea ACHARIUS, L. U. 462. 1810. SOWERBY, Eng. Bot. /. 

 2180. NYL. Syn. t. i.f. i. 



Wrangell (Trelease, 1153) ; Hidden Glacier Inlet (Trelease, 991) ; 

 Sitka (Trelease, 1107$, 1117); Muir Glacier (Trelease, 988, 990, 

 1154); Whale Island, St. Michael (Setchell). On bark of Alnus 

 oregona and on rock. Reported by Nylander as having been collected 

 at Port Clarence. 



The specimens are well developed, but all but two are sterile. Dr. 

 Lindsay states in West Greenland Lichens, 331, that all the forms 

 which he examined were sterile. All the specimens which I have 

 collected in Massachusetts are sterile, but more northern forms from 

 Maine, New Hampshire, Idaho, and Oregon show apothecia well 

 developed. 



The species has been reported from Alaska but once before. It was 

 found at Port Clarence, a much more northern locality than any re- 

 ported in this list. It appears to be a common arctic form, and there- 

 fore its comparative scarcity in Alaska is the more noticeable. 



180. Parmelia physodes (L.) Ach. 

 Lichen physodes LINNAEUS, Fl. Suec. ed. 2. 1755. 



Parmelia physodes ACHARIUS, Meth. Lich. 250. 1803. SOWERBY, Eng. Bot. /. 

 126. 



Alaska (Evans, 255) , with Usnea longissima, etc. ; Sitka (Tre- 

 lease, 1149, 11490;, 1151); Kadiak (Trelease, 1 134, on dead wood) ; 

 Fraser Reach (Coville and Kearney, 296) . Recorded by Rothrock as 

 occurring at Elephant Point, Eschscholtz Bay, Arctic Ocean, Port 

 Mulgrave, Yakutat Bay, and Fort Alexander, in Cook Inlet. 



Specimens small and sterile. No. 299 may be considered a transi- 

 tional form approaching the variety "vittata. 



181. Parmelia physodes obscurata Ach. 

 Parmelia physodes obscurata ACHARIUS, Syn. 218. 1814. 



Unalaska (Setchell) ; St. Matthew Island (Trelease, 1163^, also a 

 specimen with no number) ; Hall Island (Trelease, 1 164*5) ; Port Clar- 

 ence (Trelease, 1112), mixed with Cetraria cucullata, Parmelia saxat- 

 ilis, and Alectoria divergens. 



The unnumbered specimen from St. Matthew Island is well fruited, 

 the others are sterile. Mixed with this specimen is a sterile fragment, 

 apparently a Cladonia, and also Alectoria divergens. This variety 

 has been reported from Alaska but once before. Tuckerman records 

 that it was collected by Wright on the islands of Bering Strait. 



