gleicheniace.e. 295 



7. Mertensia vestita. 



Gleichenia vestita, Blume, Enum. PI. Jav. 2, p. 249 ? Hook. Spec. El. 1, p. 10 ? 



Hab. Mount Majaijai, Luzon, Philippine Islands. 



No little difficulty is experienced in identifying species of this 

 genus, particularly when the specific character is drawn up in such 

 brief terms as is that of the present one by Blume ; yet it embraces 

 most of the essential characteristics of our plant, which is so closely 

 related to Gleichenia revoluta, H. B. K. and of Hooker's Species Fili- 

 cum, as to differ only in its more acuminated branches, and half-lan- 

 ceolate segments : the fimbriated palese on the rhachis are present in 

 both; but they are perhaps a little more crowded in the present 

 plant 



8. Mertensia Hawaiensis. 



Glychenia Owhyhensis, Hook. Spec. Pil. 1, p. 9. 



Hab. Sandwich Islands : in forests ; rather rare. 



This is a very distinct and handsome species, allied, according to 

 Sir William Hooker, to his Gleichenia longipinnata, " especially in the 

 hairy rhachis." 



9. Mertensia bifida, Willd. 



Mertensia hifida, Willd. Spec. PL 5, p. 73 j Sw. Syn. El. p. 164. 



Hab. Vicinity of Rio Janeiro, Brazil. 



In the height, division of its fronds, and direction and breadth 

 of the branches, the present species very nearly approaches the 

 preceding; but differs in its narrower and more distant segments, 



