LICHENS 131 



174. Parmelia ambigua (Wulf.) Ach. 



Lichen ambiguus WULFEN in Ap. Jacq. Coll. 4 : 239. /. 4. f. 2. 1790. 

 Parmelia ambigua ACHARIUS, Meth. 207. 1803. 



Alaska (Funston, 36) ; Juneau (Sctchell, 1247) ; Virgin Bay (Tre- 

 lease, 1143). Sterile, on dead wood. Reported by Nylander as oc- 

 curring at Port Clarence, under the synonym Parmeliopsis ambigua 

 (Wulf.). 



175. Parmelia ambigua albescens Wahl. 



Parmelia ambigua albescens WAHLENBERG, Fl. Suec. 852. 1826. 

 Parmelia ambigua albescens SCHAERER, Spicil. 468. 1840. Fl. Dan. /. 251 2, 

 f. i b &> d. 



Virgin Bay (Trelease, 846) . Sterile, on dead wood. New to 

 Alaska. 



Neither Parmelia ambigua nor the variety albescens is mentioned 

 in Fries' Lichenes Arctoi, or by Branth and Gronlund in Gronlands 

 Lichen Flora, or in Dr. Lindsay's West Greenland Lichens. Par- 

 melia ambigua has been reported from Arctic America (Richardson) 

 and from British Columbia (Macoun) . 



176. Parmelia conspersa (Ehrh.) Ach. 



Lichen conspersus EHRHART in Ach. Prod. 118. 1798. 



Parmelia conspersa ACHARIUS, Meth. Lich. 205. 1803. SOWERBY, Eng. Bot. 

 /. 2097. 



Sitka (Trelease, 1146) ; summit of White Pass, 3000 ft. (Trelease, 

 1138) ; St. Michael (Setchell). New to Alaska. 



No. 1138, which bears apothecia, has finely divided lobes approach- 

 ing the variety stenophylla of Acharius. The other specimen is sterile. 



177. Parmelia lanata (L.) Wallr. 



Lichen lanatus LINN^US, Fl. Suec. 1125. 1755. 



Parmelia lanata WALLROTH, Fl. Germ. 529. 1831. SOWERBY, Eng. Bot. /. 846. 



Hot Springs, Baranof Island (Trelease, 1176); Unalaska (Set- 

 chell) ; Muir Glacier (Trelease, 1159, 1177). New to Alaska. 



All the specimens are sterile. No. 1 176 is much more finely divided 

 than any specimen in the Tuckerman Herbarium. The species has 

 been reported from Arctic America. 



178. Parmelia stygia (L.) Ach. 



Lichen stygius LINNAEUS, Sp. PI. 2: 1143. 1753. 



Parmelia stygia ACHARIUS, Meth. Lich. 203. 1803. SOWERBY, Eng. Bot. 

 /. 2048, 



Summit of White Pass, 3000 ft. (Trelease, 1 162*$) ; Kadiak (Tre- 

 lease, 902). On rocks. New to Alaska. 



No. 902 is mixed with Biiettia geographica, Lecanora straminea, 

 and Lecidea platycarpa. Common in Arctic regions. 



