LICHENS 135 



185. Parmelia saxatilis sulcata (Tayl.) Nyl. 



Pamtelia sulcata Taylor in Mack. Fl. Hib. 145. 1836. 



Parmelia saxatilis sulcata Nyzandek, Syn. i : 389. i860. — Mich. Ord. 22. 

 /. 4p. C. D. 



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

 2299); Virgin Bay (Trelease, 11 18). Collected by Macoun on St. 

 George Island and reported by Nylander under the synonym I^ar- 

 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 \ax\Gty panniformts^ while in no. 1118 they are narrow, 

 more elongated and spreading. All the specimens are sterile. 



186. Parmelia saxatilis omphalodes (L.) Fr. 



Lichen omphalodes lA'nyiJEVS, Fl. Suec. 1755. 



Patinelia saxatilis omphalodes Ykies, L, E. 62. 1 83 1. — Dill. Hist. Muse. /. 

 24./. So. — SowERBY, Eng. Bot. /. 604. 



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

 lease, 1 1 20); St. Paul Island (Trelease, 1115); St. Matthew Island 

 (Trelease, 1165); St. Lawrence Island (Trelease, 11 56), 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. 1 1 29 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 maybe 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 Pygm<sus, 



