PROCEEDINGS 



OF THE 



WASHINGTON ACADEMY OF SCIENCES 



Vol. VIII, pp. 141-166 pls. vi-vm August 14, 1906 



NOTES ON JAPANESE HEPATIC^. 

 By Alexander W. Evans. 



Yale University. 



Schiffner ' has already emphasized the fact that the Hepat- 

 icee of Japan are of unusual interest. They not only include 

 a very large number of species for the size of the island, over 

 250 having already been reported, but among these species are 

 both northern and southern types, owing to the many degrees 

 of latitude through which Japan extends and to the varied 

 atmospheric conditions which are to be found there. The flora 

 includes at least 2 endemic genera, Cavr'cularia Steph. 2 and 

 Makinoa Miyake, 3 both of which, according to our present 

 knowledge, are monotypic. It also includes a number of 

 species which, although referable to well-known genera, 

 present peculiarities so anomalous that they have necessitated 

 a revision or amplification of the original generic characters. 

 This, for example, is the case with Ptilidium bisseti (Mitt.) 

 Evans, 4 which differs from all other known members of the 

 genus in developing a felt of cilia on the outer surface of both 

 leaves and underleaves and which is further remarkable in bear- 

 ing water-sacs on some of the smaller branch-leaves. 



The present paper is a partial report on 2 collections, one 

 made by Mr. T. Yoshinaga (formerly Inoue), of Aki-machi, 



1 Oesterr. Bot. Zeitschr. 49: 3S5. 1S99. 



- Bull, de l'Herb. Boissier 5 : 87. 1S97. 



3 Bot. Mag. Tokyo 13 : 21. pi. 3. 1S99. 

 ♦Rev. Brvol. 32: 57. 1905. 



Proc. Wash. Acad. Sci., August, 1906. ('4 1 ) 



