I/j.2 CUMMINGS 



204. Cetraria glauca (L.) Ach. 



Lichen glaucus LINNAEUS, Fl. Suec. ed. 2. 1094. 1755. 



Cetraria glauca ACHARIUS, Meth. Lich. 296. 1803. SOWERBY, Eng. Bot. /. 

 1606. 



Broughton Strait, Vancouver Island (Trelease, noS in part) ; Sitka 

 (Trelease, 1124) ; Wrangell (Coville and Kearney, 402) ; Point Gus- 

 tavus, Glacier Bay (Coville and Kearney, 786$) ; Orca (Trelease, 

 1122). Collected by Dr. Cooley at Sheep and Salmon Creeks, near 

 Juneau, and at Sitka ; by Dr. Hayes at Prince William Sound ; and by 

 Dr. Bean at Cook Inlet. Rothrock reports that it has been collected 

 at Kotzebue Sound. 



The specimens from Sitka and Point Gustavus show a fine develop- 

 ment of the coralloid branchlets on the margin of the lobes. 



205. Cetraria lacunosa Ach. 



Cetraria lacunosa ACHARIUS, Meth. Lich. 295. t. j.f. J. 1803. 



Sitka (Trelease, 1125) ; Virgin Bay (Trelease, 1089) ; Kadiak (Tre- 

 lease, 11342); Unalaska (Trelease, 1128; Setchell). Collected by 

 Dr. Hayes at Prince William Sound; by Macoun on St. George and 

 St. Paul Islands ; and by Dr. Bean, u sterile specimen from logs on an 

 island in Cross Sound, Baranof Island, Sitka." 



The specimen from Unalaska, collected by Professor Trelease, in its 

 general aspect and coloration suggests Parmelia saxatilis ompha- 

 lodes, but it is undoubtedly a Cetraria. The specimen from Virgin 

 Bay shows a change in coloration to reddish-brown, but it is especially 

 interesting as showing the development of isidia, which are very char- 

 acteristic of Cetraria glauca, but of which no mention is made in any 

 description of Cetraria lacunosa to which I have access. 



206. Cetraria saepincola chlorophylla (Humb.) Th. Fr. 



Lichen chlorophyllus HUMBOLDT, Fl. Fri. Sp. 1793. 



Cetraria sapincola chlorophylla TH. FRIES, Lich. Arct. 40. 1860. 



Sitka (Trelease, 1107) ; Yakutat (Trelease, 1155). Sterile. New 

 to Alaska. 



The only stations which Tuckerman gives in Syn. N.'A. L. i :" 35, are 

 Oregon and the coast of California. Th. Fries, Lichenes Arctoi, 40, 

 records its occurrence in Finland. 



207. Cetraria ciliaris Ach. 



Cetraria ciliaris ACHARIUS, L. U. 50. 1810. 



Kadiak (Trelease, 1134^). New to Alaska. 



Fibrils on the margins of the thallus poorly developed. Apparently 

 not common so far north. 



