CHARACTERS OF TRIBES AND GENC11A. 



GENERAL ARRANGEMENT, &c. 

 Evolution of the fronds circinate. 



DIVISION 1. EREMOBRYA. (Page G5). 



A. Ring- of Sporangia vertical. 



* Sori Indusiate. 



Tribe 1. OLEANDRE^]. (Plate 1.) 

 Sori round, lateral. Indusium lateral, interiorly attached 

 or sometimes central, plane. 



1. OLEANDRA. Cav. (1801). 



Aspidium sp., Swartz. Newronia, Don. (1825). Ophio- 

 pteris, Eeinw. 



Surculum slender, creeping, or erect, and sub-frutes- 

 cent. Fronds simple entire linear lanceolate, 1 to 1J foot 

 long, smooth or pilose. Stipes short, node of articulation 

 sessile, or more or less elevated. Veins simple, or once or 

 twice forked, venules free parallel, their apices curved 

 outwards, forming a narrow cartilaginous margin. Sori 

 punctiform lateral, scattered or transversely uniserial. 

 Indusium plane, orbicular or reniform. 



Type. Aspidium articulatum, Swartz. 

 Illust. Hook, and Bauer, Gen. Fil. t. 45, B. Moore Ind. 



Fil. p. 72 A. J. Sm. Ferns Brit, and For. fig. 1. Hook. 



Syn. Fil. t. 5, fig. 46. 



OBS. By early authors the species oi this genus were 

 placed in 'Aspidium, but their distinct and peculiar habit, 

 together with their articulate vernation, does not accord 

 with any genus of the Aspidece Alliance. 



Fee enumerates thirteen species of this genus, but the 

 great uniformity in the form of the fronds renders it quite 

 impossible to find sufficient and permanent characters for 

 that number ; the most differential characters being in 



