S3. OII^L^ZIUM:, Ste»t-f«. 



Sori linear or linear-oblong, straight or slightly curved, springing from 

 the sides of the veins, + oblique to the costa, the lower veins of each 

 group mostly, the higher ones rarely bearing 2 sori, i.e. v^ith a sorus qn 

 each side. Indusia single or double (according to the sori), the single ones 

 opening towards the main veins or the central veins of the ultimate segments, 

 the double ones in opposite directions. 



Rhizome creeping or erect, the scales finely cancellate, with the areolae 

 mostly dark-coloured, i. e. the cells with the side walls thin and the 

 lumina mostly dark-coloured (Sadeb., in Engl. & Prantl, Nat. Pfl.Pam., I*, 

 fig. 40, A). Stipes not articulate to the rhizome, with 2 free, + flattened 

 fibro-vascular bundles. Which mostly unite towards the lamina (or higher) 



into a single diarchous one ( \ / , \/, \_J , | |, U )• Fronds simple or 



divided ; veins free or anastomosing. Hk. Bk., Syn. Pil., tab. IV, fig. 38, f — g. 



Arrangement of the sections. 



§1. EUDIPLAZIUM. Veins free. Diels, in Engl. & Prantl, Nat. Pfi.Fam., I*, 



fig. 121, A— D. 

 § 2. ANISOGONIUM. Veins anastomosing. Bedd., Handb. Ind. Ferns, fig. 92—94, 



§ 1. EUDIPLAZIUM. 



a. Fronds simple, the margin entire, crenate or toothed. (1) D. subserratum. 

 «.«. Fronds pmnatifid, at best pinnate at the very base. 

 S. Fronds herbaceous. Mhizome creeping- . 



>(;. Fronds pinnatifid throughout. Stipes approximate. (2a) D. Merrilli. 

 *.4c. Fronds pinnate at the very base. Stipes rather remote. 



ft ,;' .. ., (26) D. zeylanicHm. 



$.$. Fronds svbeanaceous. -Rhizome erect^ or short-creeping-.' Stipes :k.~^ufled.- 



(3) D. porphyrorachis. 

 uMM. Fronds pinnate or 2-pinnalifid, the lower pinnae sometimes pinnate at the base. 

 h. Pinnae entire, crenate, serrate, toothed or slightly lobed, the lowest some- 

 times more deeply lobed. 



