262 



CHAEACTEES OF TRIBES AND GENERA. 



liase truncate auricalate, sessile and articulate lyitli the 

 rachis. Veins once or twice diohotomously forked ; venules 

 aub-parallel. Sori punctiform, terminal on tlie exterior 

 venule of each fascicle, seated anterior to the dents on the 

 margin (which are not indusceform). Indusium short, 

 cuouUate. 



Type. DavalUa Rookeriana, Wall. 



lUust. Hook. Sp. Fil , vol. 1, t. 4:7 B ; Microlepia sp., 

 Bedd., r. Brit. Ind., pi. 101. 



Obs. — In the " Species Filicum " Bavallia Sookeriana is 

 placed in the sub-genus Saccoloma, and in the " Synopsis " 

 it is placed under the section 2Iicrolepia, as charactei-ised in 

 the preceding genus, but from which the present species 

 difler in having articulate pinnas, this character and its 

 special habit seem to indicate relationshijj with NepJiro- 

 lepis. In order, therefore, to mark its peculiarity in the 

 present group, 1 deem it worthy to be ranked as a distinct 

 genus. 



Sp. S. Hookeriana (fr'a//.). 



A native of the principal Fern regions of India. 



1-14.— LoxsoMA, i?. Br., MS. (A. Cunn. 1836). 



Vernation uniserial, sarmentose. Fronds long, stipate, 

 deltoid decompound, 1 to l^ foot high, glaucous beneath ; 

 lacinse lanceolate, dentate. Vi'i,is simple or forked ; ve- 

 nules free, their apices prolonged beyond the margin, 

 forming a free columnar receptacle. Special and accessory 

 indusia united, forming a vertical, urceolate, estrorse cyst. 

 Sporangia obovate, pedicillate, seated round the receptacle, 

 which is elongated beyond the mouth of the indusium. 

 Ring of sporangia oblique. 



Type. L. Cunninghami, E. Brown. 



