LICHENS 



Ocean. Tuckerman records it as having been collected in Arctic 

 America (on mosses) by Wright. Th. Fries, in Lichenes Arctoi, 

 states that it is common in Scandinavia, Spitzbergen, and Greenland. 

 The specimen from Kukak Bay is on bark, with Buellia parasema 

 and a Physcia. The specimen from Kadiak has immature spores and 

 is doubtfully referred here. On the same piece of wood are three 

 different species of Cetraria and three of Parmelia. 



126. Placodium aurantiacum (Lightf.) Naeg. & Hepp. 



Lichen aurantiacus LIGHTFOOT, Fl. Scot. 2: 810. 1777. 



Placodium aurantiacum NAEGELI & HEPP, Sporen der Flechten Europas. 1853. 



St. Lawrence Island (Trelease, 853). On dead wood. New to 

 Alaska. 



This species was collected in Arctic America by Richardson. 



127. Placodium murorum (Hoffm.) DC. 



Lichen murorum HOFFMANN, Enum. 63. /. g. f. 2. 1784. 

 Placodium murorum DE CANDOLLE, Fl. Fr. 2: 378. 1805. 



Virgin Bay, Prince William Sound (Trelease, 978 in part) ; Ka- 

 diak (Trelease, 982, on slate rock). New to Alaska. Collected by 

 Richardson in Arctic America. 



With NO. 978 is a specimen of Lecanora sulfusca coiloc&rpa. 



128. Placodium elegans (Link) DC. 



Lichen elegans LINK, Ann. i : 37. 1791. 



Placodium elegans DE CANDOLLE, Fl. Fr. 2 : 379. n. 1026. 1805. So WERE Y, 

 Eng. Bot. /. 2181. 



Alaska (Funston, 24) ; White Pass, 900 ft. (Trelease, 980) ; Van- 

 couver Island, Broughton Strait (Trelease, 985 in part) ; Unalaska 

 (Setchell); St. Michael (Setchell). Collected by Wright on the 

 islands of Bering Strait, by Dr. Bean on Chamisso Island, at Elephant 

 Point, in Eschscholtz Bay, and on Chernofski Island, and by Macoun 

 on St. Paul Island. This lichen has been reported from various points 

 in Arctic America, and it seems to be common through all the moun- 

 tainous and northern regions of America, from the Atlantic to the 

 Pacific. 



No. 985 has with it a lichen which is apparently a sterile Lecidea. 



129. Placodium coralloides ? Tuck. 



Placodium coralloides TUCKERMAN, Syn.'N. A. L. i : 169. 1882. 



St. Paul Island (Trelease, 1000). On the earth. 



A very interesting specimen which may possibly be referred here. 

 Unfortunately it is not fruited, and therefore its classification is uncer- 



