146 CUMMINGS 



Additional Alaska species: Cetraria delisei submedia Nyl., Port 

 Clarence; C. crispa (Ach.), Port Clarence; C. nigricans^y\., Port 

 Clarence and St. Lawrence Island; Platysma tilesii Ach., Port Clar- 

 ence; and P. scEpincolaiorma. minuta Nyl., Port Clarence all re- 

 corded by Ny lander only; Platysma septentrionale~Ny\., listed by 

 Ny lander from Port Clarence and by Rothrock from Kotzebue Sound ; 

 C. glauca substraminea Babington, reported by Babington from 

 Kotzebue Sound. Dr. Bean collected two species, C. juniperina (L.) 

 Ach., sterile specimens, on Chamisso Island in Eschscholtz Bay, and 

 C. aleurites (Ach.) Th. Fr. at Cook Inlet and, on the bark of coni- 

 ferae, at Eschscholtz Bay. Concerning the latter species Rothrock * 

 writes : " Stein has said of this species that it is an evident transition, 

 resembling Cetraria in its fruit and spermagonia, and Parmelia in 

 habit, and hence often placed by later lichenologists in the latter genus." 

 J. M. Macoun collected C. aculeata (Schreb.) Fr. on St. Paul Island 

 and Nylauder reports its occurrence at Port Clarence. Dr. Hayes 

 added one species to the list, C. glauca stenophylla Tuck., collected 

 at Prince William Sound. Tuckerman reports two additional species, 

 C. ramulosa (Hook.) Tuck., a common alpine and arctic form, and C. 

 chrysantha Tuck. The range of the latter species is very interesting. 

 It was collected by Wright on the islands in Bering Strait, and is repre- 

 sented by a specimen in the Babington Herbarium collected on rocks 

 at Kotzebue Sound; the only other locality given is Japan, where 

 fertile specimens were collected by Wright. 



RAMALINA. 



KEY TO THE SPECIES. 



Thallus rather elongated, finely divided .pusilla geniculata. 



Thallus short, compressed, coarsely divided .polymorpha. 



215. Ramalina polymorpha Ach. 



Ramalina polymorpha ACHARIUS, L. U. 600. 1810. 



Unalaska (Setchell) ; St. Paul Island (Trelease, 1192). Sterile. 

 An alpine and arctic species. Previously reported from the islands in 

 Bering Strait, collected by Wright, and from St. Paul Island by Macoun 

 and Dr. Bean. Rothrock's determination of Dr. Bean's specimen is 

 revised by Nylander, who makes it R. polymorpha emplecta. 



1 Rothrock, Dr. J. T. List of and Notes upon the Lichens collected by Dr. T. 

 H. Bean in Alaska and the Adjacent Regions in 1880. Proceedings of the United 

 States National Museum, 7 : 1884. 



