LICHENS 



135 



185. Parmelia saxatilis sulcata (Tayl.) Nyl. 

 Parmelia sulcata TAYLOR in Mack. Fl. Hib. 145. 1836. 



Parmelia saxatilis sulcata NYLANDER, Syn. i ; 389. 1860. MICH. Ord. 22 

 /. 49. C. D. 



Alaska (Funston, 7); Sitka (Trelease, 1149); Yakutat (Trelease, 

 2299); Virgin Bay (Trelease, niS). Collected by Macoun on St. 

 George Island and reported by Nylander under the synonym Par- 

 melia sulcata Tayl. as occurring on St. Lawrence Island and at Port 

 Clarence. 



In NO. 1 1 21 the lobes are short and somewhat overlapping, tending 

 toward the variety panniformis, while in NO. 1118 they are narrow, 

 more elongated and spreading. All the specimens are sterile. 



1 86. Parmelia saxatilis omphalodes (L.) Fr. 

 Lichen omphalodes LINN^US, Fl. Suec. 1755. 



Pat melia saxatilis omphalodes FRIES, L. E. 62. 1831. DILL. Hist. Muse. /. 

 24. f. 80. SOWERBY, Eng. Bot. /. 604. 



Kadiak (Trelease, 1132); summit of White Pass, 3000 ft. (Tre- 

 lease, 1120) ; St. Paul Island (Trelease, 1115) ; St. Matthew Island 

 (Trelease, 1165); St. Lawrence Island (Trelease, 1 156), associated 

 with Lecanora -varia symmicta; Port Clarence (Trelease, 1129); 

 St. Michael (Setchell) ; Cape Nome (Setchell). Collected by Dr. 

 Bean near Cape Lisburne and reported by Nylander under the syn- 

 onym P. omphalodes (L.) as occurring on St. Lawrence Island. 



No. 1129 shows the development of minute laciniae and NO. 1105 of 

 isidia which have been mentioned as characteristic of some forms of 

 Parmelia saxatilis. No apothecia are developed on any of these 

 specimens. 



Additional Alaska species : P. austerodes Nyl., recorded by Ny- 

 lander as having been collected on St. Lawrence Island and at Port 

 Clarence; and Parmeliopsis aleurites (Ach. Sommerf.) Nyl., re- 

 corded by Nylander as occurring at Port Clarence. Rothrock reports 

 P. perlata (L.) Ach., P. perforata (Jacq.) Ach., and P. tiliacea 

 (Hoffm.) Floerk., as having been collected at Kotzebue Sound. 

 Hooker and Arnott, in their list of Kotzebue lichens, include P. dia- 

 trypa Ach., which may be referred to P. pertusa (Schrank.) Schaer. 



THELOSCHISTES. 



KEY TO THE SPECIES. 



Thallus not powdery on the margin .polycarpus. 



Thallus powdery on the margin. 



Lobes flat, linear, profusely granulate lychneus. 



Lobes erect, terete, branched lychneus pygmaus. 



