LICHENS 105 



96. Lecanora cinerea gibbosa (Ach.) Tuck. 



Urceolaria gibbosa ACHARIUS, Meth. Lich. 144. 1803. 



Lecanora cinerea gibbosa NYLANDER, Lich. Scand. 154. 1861. TUCKERMAN 

 Syn. N. A. L. i : 198. 1882. 



Summit of White Pass, 3000 ft. (Trelease, 888, 851 in part); 

 Kadiak (Trelease, 894, 895) ; Muir Glacier, Glacier Bay (Trelease, 

 887) ; Cape Nome (Setchell). Buettia geographica and its variety 

 atromrens are with the specimens from White Pass. Rothrock lists 

 this variety as collected by Dr. Bean, but gives no locality. Nylander 

 records its occurrence at Konyam Bay, on the Siberian coast of Bering 

 Strait. 



97. Lecanora occulata (Diks.) Ach. 



Lichen occulatus DIKSON, PI. Cr. Br. 2 : 17. /. 5. f. 5. 1785-1801. 

 Lecanora occulata ACHARIUS, Syn. 148. 1814. SOWERBY, Eng. Bot. /. i8jj. 



Kadiak (Trelease, 1217); Unalaska (Setchell); Cape Nome (Set- 

 chell) ; Hall Island (Trelease, 1204) ; St. Matthew Island (Trelease, 

 1020) . Growing over mosses and other lichens. Reported by Macoun 

 from St. Paul Island ; by Tuckerman as collected by Wright on the 

 islands of Bering Strait ; and by Nylander, under the synonym Per- 

 tusaria occulata, from St. Lawrence Island. 



A widely distributed northern lichen. 



98. Lecanora tartarea (L.) Ach. 



Lichen tartareus LINN^US, Sp. PI. 2 : 1141. 1753. 



Lecanora tartarea ACHARIUS, L. U. 371. 1810. SOWERBY, Eng. Bot. /. 156. 



Alaska (Dr. Kellogg, no number) ; summit of White Pass, 3000 

 ft. (Trelease, 1137); Unalaska (Trelease, 975 ; Setchell); Hall Is- 

 land (Trelease, 862) ; St. Matthew Island (Trelease, 867, 868, 972) ; 

 St. Lawrence Island (Trelease, 1019) ; Cape Nome (Setchell). Most 

 of the specimens are sterile. Macoun reports it as *' common and 

 variable " on St. George and St. Paul Islands. Rothrock adds Cape 

 Lisburne, Unalaska, and the Shumagin group of islands as localities 

 where it was collected by Dr. Bean. 



The species, with its varieties, is one of the most abundant of the 

 northern lichens, and was formerly of considerable commercial value 

 in the coloration of fabrics and the manufacture of litmus. 



99. Lecanora tartarea frigida (L. fil.) Sw. 



Lichen frigidus LINN^US FIL. in SWARTZ, Meth. Muse. 1781. 



Lecanora tartarea frigida SWARTZ, Meth. Muse. /. /./. 4. 1781. SOWERBY, 



Eng. Bot. /. 1879. 



Kadiak (Trelease, 871) ; Hall Island (Coville and Kearney, 2066) ; 

 St. Lawrence Island (Trelease, 1018). The specimen from St. Law- 



