260 



F I L I C E S. 



In the Hawaiian plant, the fronds are more erect and rigid in con- 

 sistence ; their ultimate divisions broader and less deeply divided, and 

 the indusium shorter and wider at the mouth than in that from 

 Luzon. The Tahiti specimens agree with those of the Sandwich 

 Islands. On the first examination we supposed that these might 

 constitute a distinct species ; but a closer comparison did not reveal 

 any further or more important differences between them and the 

 Luzon plant. 



21. Trichomanes longisetum, Bory. 



Trichomanes longisetum, Bory, in Willd. Spec. PL 5, p. 510 ; Hook. Spec. Fil. 1, 

 p. 137. 



Hab. Feejee Islands : on trees, in mountain forests ; rare. 



A well-marked species; distinguished from the preceding by its 

 much smaller fronds, with the rhachis winged above; its pinnae 

 narrower, more distant, and deflexed, with linear-capillaceous and 

 forked lacunae; the indusium curved; the receptacle long and fili- 

 form, exserted nearly half an inch. 



22. Triciiomanes rigidum, Sw. 



Trichomanes rigidum, Sw. Syn. Fil. p. 144 ; Willd. Spec. PI. 5, p. 512 ; Hook. 



Spec. Fil. 1, p. 133. 

 T. Mandiocanmn, Raddi, Plant. Brasil. 1, p. 61, t. 79, f. 2. 

 T. achilleoefoUum, Willd. Spec. PI. 5, p. 512. 



Hab. Tahiti, Society Islands. (3. Feejee Islands. 



The rootstock of this sometimes rises to a height of one or two 

 inches, bearing on its crown 4 to 8 fronds, with a stipe 2 to 5 inches 

 long; the latter is round, with two narrow marginal lines, and beset 

 with brown compressed hairs at the base. Fronds usually rather 

 longer than the stipe, oblong, acuminate, bi pinnate, with linear-lan- 

 ceolate, inciso-pinnatifid pinnules ; the laciniai linear, acute, bifid or 

 trifid; the primary and secondary rhachis slightly margined. Indu- 



