LICHENS 125 



The spores are similar to those of the type. The specimen from 

 Fraser Reach shows also fragments of Sticta oregana. Judging from 

 the specimens submitted, this must be one of the most abundant and 

 characteristic lichens of the Alaskan coast. It is noticeable that in the 

 collection here listed the species does not appear north of the Aleutian 

 Islands. In the northern region its place is taken by the variety 

 linita, which is represented by nine specimens, only three of which 

 were collected south of the Aleutian Islands, and those all at one place. 

 Arnold reports it from Newfoundland but not from Alaska. Dr. Lind- 

 say J says of it : " Not in the present collection and not given at all by 

 Th. Fries as a Greenland lichen. But in the Kew Herbarium I saw 

 specimens of the ordinary form labeled ' Davis Straits.' The labels, 

 however, unfortunately did not inform us on which coast the plant was 

 collected, east or west." Fries reports it from Lapland, Norland, and 

 the Samoyede country. Nylander records its occurrence in Scandina- 

 via, but not its frequency. Tuckerman has recorded it for California. 



159. Sticta pulmonaria linita (Ach.) Nyl. 



Sticta linita ACHARIUS, Syn. 234. 1814. DELIS. Stict. 145. t,i8.f. 63. 1825. 

 Sticta pulmonaria linita NYLANDER, Syn. 96. 1860. 



Lowe Inlet, B. C. (Coville and Kearney, 339<5, 342, 344) ; Unalaska 

 (Setchell) ; Hall Island (Trelease, 1088) ; St. Matthew Island (Tre- 

 lease, 1069) ; Port Clarence (Trelease, 1068, 1087, 10870, IO S7<$) ; 

 Cape Nome (Setchell). All sterile. Collected by Macoun on St. 

 Paul Island. It is reported from Port Clarence by Nylander. 



Nylander, in his revision of Rothrock's list, states that Dr. Bean's 

 specimen, which is listed as Sticta pulmonaria by Rothrock, should 

 be placed under this variety. This rock form is the more widely dis- 

 tributed alpine and arctic form. 



Additional Alaska species of the genus are : Sticta limbata (Sm.) 

 Ach., collected by Dr. Cooley at Sheep Creek and at Salmon Creek, 

 near Juneau ; and Sticta scrobicidata (Scop.) Mass., credited by 

 Rothrock to Kotzebue Sound, no collector being given. 



Family UMBILICARIACE^E. 

 UMBILICARIA. 



KEY TO THE SPECIES. 



Thallus with fibrils on the under side. 



Thallus blackish-brown. 



Thallus one-leaved, not lacerate underneath .prolosctdea. 



1 Lindsay, Dr. W. Lander. Observations on the Lichens collected by D. 

 Robert Brown, M.A., F.R.G.S., in West Greenland in 1867. Transactions of 

 the Linnsan Society, vol. xxvn, 327. 1871. 



