392 BOTANY. 



Psilotum triquetrum. An infusion of this Club-moss 

 is taken medicinally by the natives, as a remedy for 

 visceral diseases. 



Sandwich Group ; native name moa. 



P. complanatum. Society Isles. 



P. Forsteri. (Tmesipteris tannensis, FORST.) 



Ophioglossum Lusitanicum. Adder's Tongue. St. 

 Helena. 



FERNS. 



Acrostichum grandifolium The fronds of this spe- 

 cies are often more than six feet high ; the posterior 

 surface of the upper leaflets, only, is covered with a 

 yellow fructification. Inhabits swamps. 



Society Isles ; native name pidto. 



Pteris pedata. Society and Sandwich Isles. 



P. excelsa. This is a gigantic and ornamental spe- 

 cies. The tops of the fronds are eaten as a salad by 

 the natives. 



Oahu, Sandwich Isles. 



P. argula. St. Helena. 

 P. alata. Sandwich Group. 



Blechnum orientals. Society Isles; native name 

 momfa. 



Hemionitis reticulata. Society Isles. 



