22. DRTOPTERIS. § 2. NEPHRODIIIM. 207 



d'.d'. Slipe and rachis without glands. 

 e'. Stipes naked. 



f. Veins ± 7 on each side of the main veins. (92) D. laevis. 

 f'.f. Veins iO — i5 on each side of the main veins. 



(93) D. brachyodus. 

 e'.e'. Stipes hairy^ [brisUy or scaly. (94) D. ferox. 



c'.c'. Lower pinnae conspicuously reduced or dwindling down into 

 mere auricles. 

 §. Sori submarginal. (95) D. Loheriana. 



§.$. Sori + medial. , 



>|c. Costae with a large gland at the base beneath. 



(96) D. lalebrosa. 

 :^.^. Costae without/ gland at the base beneath. 

 f • Reduced pinnae few, distant, or surfaces not conspicuously hairy. 



(91) D. piloso-squamata. 

 •^.+• Reduced pinnae numerous, close. Surfaces conspicuously 

 hairy. (98) D. sagittifolia. 



b',h'. Texture herbaceous to firm-papyraceous. 



a. Lower pinnae hardly, if at all, reduced; the fronds occasionally 



with a single pair of dwarfed or reduced pinnae at the base. 

 • p. Pinnae cut less than + 'j^-way down to the costa. 

 y. Sori medial on the veins. 



^. Surfaces naked. (99) D. caudiculata. 



(J.J. Surfaces hairy, at least on the ribs beneath.- 

 s. Lowest pinnae sharply deflexed. (100) D. simillima. 



£.e. Lowest pinnae not sharply deflexed. 



.J.. Lowest i — 2 pairs of veins anastomosing . 



:)(.. Pinnae cut ','4 — ^j^-way down to the costa. The 



2 lower veins anastomosing. (101) D. pseudoreptans. 



>(c.*:. Pinnae cut + ^j^-way down to the costa. Only 



the lowest veins anastomosing. fl02) D. parasitica. 



f .f. Lower 5 — 8 pairs of veins anastomosing. 



(103) D. indica. 

 7.7. Sori near the main veins. Upper surface + hairy, the under 

 one + glandular. (104) D. sakayensis. 



i3.^. Pinnae cut more than ± %-way down, to the costa. (*) 



(*) See also D. parasitica, 0, Ktze. 



