65 117 



9. Andine species. Pinnæ opposite, firm ; veins about 



8-jugate 71. D. rufa (Poir.) C. Chr. 



V 9. South Brazilian species. Pinnæ alternate, herba- 



ceous; veins about 5-jugate .... 72. D. Stierii (Ros.) C. Chr. 

 7. Sporangia glabrous. 



8. Lamina herbaceous or membranous. 



9. Rachis subglabrous or more or less pubescent by 

 long hairs, not densely pulverulent by very short 

 hairs. 



10. Lower pinnæ not or a little reduced, not 

 auriculiform. 



11. Pinnæ 3 — 4 cm long; rachis and costæ on 

 both sides pubescent. Indusium none 



73. D. blamla (Fée) C. Chr. 

 11. Pinnæ 6 — 7 cm; rachis and costæ beneath 

 glabrous. Indusium present 



74. D. tablana (Christ) C. Chr. 

 10. 1 — 5 pairs of lower pinnæ much reduced, 

 auriculiform or glanduliform. 

 11. Stipe at base with many long, brown, 

 squarrose scales. 



12. Pinnæ about 6 cm long, rigidly mem- 

 branous or papyraceous. 

 13. Reduced pinnæ few (1—2 pairs). 

 Veins above with long setæ 



75. D. Rimbachii Ros. 

 13. Reduced pinnæ in 4 — 5 pairs. Veins 

 above without long setæ. 

 14. Lower pinnæ gradually redu- 

 ced. Upperside hairy, not glossy 



76. D. brachypiis (Sod.) C. Chr. 

 14. Lower pinnæ suddenly reduced. 

 Upperside glabrous, glossy 



77. D. supranitens Christ. 

 12. Pinnæ about 12 cm long, not glossy 



above, thinly membranous 



78. D. tablaziensis Christ. 

 11. Stipe at base with a few scattered, short 



scales or scaleless. 



12. Hairs of rachis beneath none or few, 

 early deciduous. 



13. Pinnæ unequal-sided, the anterior 



(upper) side being broader than 



the posterior one. 



14. Pinnæ not deeply cut with a 



straight, entire, cuneate base on 



the lower side. Underside eglan- 



dulose. Veins 1 — 3-jugate 



58. D. longicaulis (Bak.) C. Chr. 

 14, Pinnæ regularly pinnatifid on 

 both sides. Underside glandu- 

 lose. Veins 3 — 4-jugate 



57. D. sanctiformis n. sp. 



D. K. D. Vidensk. Selsk Skr., 7. Brekke, naturvidensk. og mathem. Afd. X. 2. 16 



