LICHENS 
121 
being given. Dr. Cooley collected it at Loring and at Sheep Creek, 
near Juneau; Macoun adds St. George Island and St. Paul Island to 
the list of localities. Under the synonym Pelt idea apthosa Acli., 
Nylander credits it to Port Clarence ; in the lists of Hooker and Arnott, 
and Babington, it is reported from Kotzebue Sound. 
There is great difference in the size of the fronds in the different 
specimens. No. 1040, from Hot Springs, is characterized by very long 
and narrow lobes, the specimen being sterile. The three fertile spec¬ 
imens, 1053, 1062, and 1076, are all small. 
149. Peltigera venosa (L.) Hoffm. 
Lichen venosus Linn/EUS, FI. Suec. ed. 2. 1097. 1755. 
Peltigera venosa Hoffmann, PI. Lich. t. 6.f.2. 1790-1801.— Sowerby, Eng. 
Bot. t. 887. 
Juneau (Setchell, 1242) ; Hidden Glacier Inlet, Yakutat Bay (Tre- 
lease, 1077, 1105); Unalaska (Setchell). Fertile. Collected by 
Wright on the islands of Bering Strait. In Rothrock’s Flora of 
Alaska it is credited to Kotzebue Sound, under the synonym Peltidea 
venosa (L.) Nyl. Babington records its occurrence at Kotzebue 
Sound; Nylander lists it as collected at Port Clarence. 
Other Alaska species of the genus are: P. scabrosa Fr., reported 
by Nylander from St. Lawrence Island and Port Clarence; P. canina 
sorediata Schaer., collected by Wright on banks of islands in Bering 
Strait; and Peltidea polydactyla scutata Fries, reported by Babington 
as having been collected at Kotzebue Sound. 
NEPHROMA. 
KEY TO THE SPECIES. 
Thallus greenish straw-colored. arcticum. 
Thallus brown. 
Thallus tomentose beneath. tomentosum. 
Thallus naked. 
Thallus not sorediate .. Icevigatutn. 
Thallus sorediate ... Icevigatutn par He. 
150. Nephroma laevigatum Ach. 
Nephroma Icevigatum Acharius, Syn. 242. 1813.— Sowerby, Eng. Bot. t. 
305- 
Juneau (Setchell, 1244) ; Sitka (Trelease, 1072) ; Yakutat Bay 
(Trelease, 1065a, 1092, 1100 in part) ; Virgin Bay (Trelease, 1073) ; 
Port Clarence (Trelease, 1071,10S7C) ; Cape Nome (Setchell). New 
to Alaska. 
