NOTES ON JAPANESE HEPATIC^E I43 



Type locality, Ioki-mura, Tosa. Collector, Yoshinaga (no. 

 11), November, 1903. 



In his Hepaticje Japonic^ Stephani ' accredits to Japan the 

 4 following species of Metzgeria: — M. conjugata Lindb., M. 

 furcata (L.) Dumort., M. hamata Lindb. and M. -pubescens 

 (Schrank) Raddi. All of these species have a wide geographi- 

 cal distribution in temperate regions, and M. hamata is also 

 common in many tropical countries. Two years later, in his 

 Species Hepaticarum, Stephani 2 throws doubt upon the occur- 

 rence of M. furcata in Japan but adds a fifth species, M. con- 

 sanguinea Schiffn., 3 originally described from Java but now 

 known also from the island of Luzon. 



Of these 5 species, M. hamata and M. consanguinea are both 

 closely related to M. quadriscriata. They agree with it in their 

 dioicous inflorescence and also in the structure of the costa, which 

 is bounded both above and below by 2 rows of cortical cells. In 

 these 2 species, however, the thallus is more robust than in M. 

 quadriscriata, the marginal cilia are borne in pairs, and some of 

 the branches at least are strongly convex. M. hamata is further 

 distinguished by its larger cells, and by its longer, more numer- 

 ous and more contorted cilia, while in M. consanguinea many 

 of the ultimate branches are practically wingless and extend 

 outward from the substratum. Whether this last peculiarity is 

 to be considered a specific character or not is somewhat ques- 

 tionable. Stephani implies that it may be due to some unusual 

 condition in the environment and states that he has seen similar 

 branches in other species. 



Another close ally of M. quadriscriata is M. lindbcrgii 

 Schiffn., 4 a Javan species, which is now known also from 

 Sumatra, Tahiti and the Marquesan Islands. M. lindbcrgii 

 agrees with the new species in the structure of its costa, and also 

 in the fact that its marginal cilia are borne singly. It is, how- 

 ever, more robust, its wings being often 15 cells broad, and its 

 inflorescence is autoicous. From M. conjugata and M. furcata 



1 Bull, de l'Herb. Boissier 5 : 81. 1S97. 



2 Bull, de l'Herb. Boissier 7 : 941, 947. 1S99. 

 3 Nova Acta Acad. Caes. Leop. -Carol. 60 : 271. 1S93. 

 4 Denkschr. Mat.-Naturw. CI. Kais. Acad. Wiss. Wien 67: 30. 189S. 



