262 CHARACTERS OF TRIBES AND GENERA. 



base truncate auriculate, sessile and articulate with the 

 rachis. Veins once or twice dichotomously forked ; venules 

 sub-parallel. Sori punctiform, terminal on the exterior 

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

 margin (which are not indusasform). Indusium short, 

 cucullate. 



Type. Davallia Hookeriana, Wall. 



Illust. Hook. Sp. Fil , vol. 1, t. 47 B ; Microlepia sp., 

 Bedd., F. Brit. Ind., pi. 101. 



OBS. In the " Species Filicum " Davallia Hookeriana is 

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

 it is placed under the section Microlepia, as characterised in 

 the preceding genus, but from which the present species 

 differ in having articulate pinnae, this character and its 

 special habit seem to indicate relationship with Nephro- 

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

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

 genus. 



Sp. S. Hookeriana ( Wall}. 



A native of the principal Fern regions of India. 



144. LOXSOMA, E. Br., MS. (A. Cunn. 1836). 



Vernation uniserial, sarmentose. Fronds long, stipate, 

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

 lacinsB lanceolate, dentate. Veins 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, extrorse cyst. 

 Sporangia obovate, pedicillate, seated round the receptacle, 

 which is elongated beyond the mouth of the indusium. 

 Ring of sporangia oblique. 



Type. L. Cunning hami, R. Brown. 



