142 
CUMMINGS 
204. Cetraria glauca (L.) Ach. 
Lichenglaucus Linnjeus, FI. Suec. ed. 2. 1094. 1755. 
Cetraria g/auca Acharius, Meth. Lich. 296. 1803.— Sowerby, Eng. Bot. t. 
1606. 
Broughton Strait, Vancouver Island (Trelease, 1108 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, 1134c); 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, “ 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, FI. Fri. Sp. 1793. 
Cetraria scepmcola chlorophylla Th. Fries, Lich. Arct. 40. i860. 
Sitka (Trelease, 1107); Yakutat (Trelease, 1155). Sterile. New 
to Alaska. 
The only stations which Tuckerman gives in Syn. N. A. L. 1 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, 1134a?). New to Alaska. 
Fibrils on the margins of the thallus poorly developed. Apparently 
not common so far north. 
