LICHENS 
*43 
20S. Cetraria fahlunensis (L.) Schaer. 
Lichen fahlunensis Linn/EUS, FI. Suec. no. 107. 1755. 
Cetraria fahlunensis Schaerer, Spicil. 255. 1833. —Sowerby, Eng. Bot. t. 
653. 
Muir Glacier (Trelease, 115S) ; summit of White Pass (Trelease, 
1162) ; Kadiak (Trelease, 1134c) ; Unalaska (Setchell) ; Hall Island 
(Trelease, 1164) ; St. Matthew Island (Trelease, 1163, 1166) ; Cape 
Nome (Setchell). Collected on St. Paul Island by Macoun. Roth- 
rock includes it in his list of species collected by Dr. Bean, but with 
no indication of special locality. 
Schaerer recognizes two forms, one indicated as a. major , having 
lobes of the thallus broad and granulate on the margin, the other b. 
minor , having the lobes of the thallus narrow and scarcely at all granu¬ 
late on the margins. No. 1166 is a good example of the first form, 
and 1164 of the second, while 1158 and 1162 are transition forms. 
An examination of material in my herbarium from the mountains of 
New Hampshire and from Labrador shows that both forms are found 
on the same specimen, and therefore it hardly seems worth while to 
attempt to discriminate. 
209. Cetraria nivalis (L.) Ach. 
Lichen nivalis Linnaeus, FI. Suec. 413. 1755. 
Cetraria nivalis Acharius, Meth. Lich. 294. 1803. —Sowerby, Eng. Bot. 
t. 1994. 
Alaska (Funston, 32) ; Agattu Island (Townsend, 75) ; St. Michael 
(Turner, 836) ; St. Matthew Island (Trelease, 1190). Collected by 
Dr. Hayes at Taku; by J. M. Macoun on St. George and St. Paul 
Islands. Under the synonym Platysma nivale (L.) Nylander records 
its occurrence at Port Clarence. 
The specimen from Agattu Island by C. H. Townsend is a speci¬ 
men from the U. S. Fish Commission Steamer Albatross. The seg¬ 
ments of the thallus are dwarfed and, at the same time, broader than 
the common forms. No. 836, from St. Michael, has fragments of 
Cladonia rangiferina mixed with it. 
210. Cetraria cucullata (Bell.) Ach. 
Lichen cucullatus Bellardi, App. FI. Pedem. 1792. 
Cetraria cucullata Acharius, Meth. Lich. 293. 1803. —Hoffm. Plant. Lich. 
/. 66 . f. 2. 
Agattu Island (Townsend, 756) ! Unalaska (Setchell) ; St. Mich¬ 
ael (Turner, 842; Setchell); St. Lawrence Island (Trelease, 1238, 
a fragment with Clado?iia rangiferina ) ; St. Lawrence Island, North- 
