[289] HEPATIC^E OF ALASKA 343 



marily with Alaskan plants, the Hepaticre of the region in 

 question are included by Mr. W. H. Pearson in his ' List of 

 Canadian Hepaticee ' l and by Professor Underwood in his ' Pre- 

 liminary List of the Pacific Coast Hepaticee. ' 2 Attention is also 

 called to several interesting species, including four not else- 

 where recorded, by Dr. Marshall A. Howe 3 in two of his recent 

 publications. 



The brief survey just given considers those collections only 

 of which published records have appeared. From time to time 

 occasional specimens have been brought home by other visitors 

 to the Territory, among whom Mr. C. H. Townsend, Mr. J. M. 

 Macoun, and Mr. Thomas Howell should especially be men- 

 tioned. It is quite possible that some of the species reported 

 in the present paper as new to Alaska may occur among their 

 collections. 



The hepatic flora of northern Alaska is essentially like that 

 of other northern regions. A few of its species are known 

 from Europe and America only, a still smaller number from 

 Asia and America only, but the vast majority occur in a north- 

 ern belt extending wholly around the earth. As we proceed 

 southward, a few species characteristic of the Pacific Coast 

 region of North America make their appearance and mingle 

 with the more northern types. These include Ptilidium cali- 

 fornicum, Porella navicularis, Radula bo lander i, Frullania 

 nisquallcnsis, and Frullania franciscana. The number of en- 

 demic species is extremely small, and at present not one of 

 them can be quoted with any degree of certainty. Of the 

 species proposed as new by Herr Stephani, Scapania albescens 

 is reduced to a synonym of Scapania bolandcri by Mr. Pearson, 

 doubt is thrown upon the two species of Radida by Dr. Howe, 

 while the fourth species, Frullania chilcootiensis, is too incom- 

 pletely known to be regarded as thoroughly established. As 

 Dr. Howe has recently pointed out, Lepidozia jilamentosa is 



1 Published in Montreal, 1890. 



2 Zoe, i : 361-367. 1891. Two species are here noted as Alaskan for the 

 first time. 



3 The North American Species of Porella. Bull. Torr. Bot. Club, 24: 512- 

 527. 1897. The Hepaticse and Anthocerotes of California. Mem. Torr. Bot. 

 Club, 7 : 1899. 



