POLYPODIACE.E. 263 



* ■* Frondes bi-tripinnatifidoz, ciliatce vel pilosce. 



2. Hymenophyllum ciliatum, Sw. 



Hymenophyllum ciliatum, Sw. Syn. Fil. p. 147 ; Willd. Spec. PI. 5, p. 519 ; Hook. 

 & Grev. Ic. Fil. t. 35; Hook. Spec. Fil. 1, p. 88. 



Hab. Organ Mountains, Brazil : on moist rocks. 



The excellent figure in the Icones Filicum represents the indusium 

 precisely as it exists in our plant; that is, not at all "cordate or 

 oblique" at the base, a character which is, however, said by Sir 

 William Hooker, in his Species Filicum, to be very constant. 



3. Hymenophyllum lanceolatum, Booh, & Am. 



Hymenophyllum lanceolatum, Hook. & Arn. Bot. Beech. Voy. p. 109 ; Hook. Spec. 

 Fil. 1, p. 94, t. 34, B. 



Hab. Sandwich Islands. 



This is of very frequent occurrence, creeping on rocks and the 

 trunks of trees. Its broadly lanceolate and bipinnatifid fronds, with 

 appressed, simple, or forked hairs on the margin of the segments and 

 costa, and the orbicular, ciliated indusium, are its most characteristic 

 features. The fronds and slender rootstock in a recent state are of a 

 brown colour. In elevated and exposed situations it assumes the 

 dwarf, compact habit of T. obtusum, from which it is then known only 

 by the fronds being less hirsute and more contracted into a point. 



4. Hymenophyllum obtusum, Book. & Am. 



Hymenophyllum obtusum, Hook. & Arn. Bot. Beech. Voy. p. 109 ; Hook. Spec. Fil. 

 1, p. 93, t. 33, D. 



Hab. Sandwich Islands. 



