69 121 



13. Stipe at base with many long, brown 



scales 75. D. Rimbachii Ros. 



13. Stipe at base with a few scattered 

 short scales. 



14. Rachis and costæ beneath short- 

 ly setose 130. D. Pavoniana (Kl.) C. Chr. 

 14. Rachis and costæ villous by long, 

 pluricellular hairs 



170. D. multiformis n. sp. 

 12. Several pairs of distant gradually or ab- 

 ruptly reduced pinnæ. 

 13. Stipe very densely clothed with 



woolly hairs 166. D. lanipes C. Chr. 



13. Stipe glabrous or sparsely pubescent. 

 14. Lamina gradually narrowed 

 downwards 



98. D. Galanderi (Hieron.) C. Chr. 

 14. Lamina abruptly narrowed 



80. D. 'lustrata (Hieron.) C. Chr. 

 6. Rachis (and costæ beneath) more or less scaly. 



7. Scales rather few, small and narrow-subulate, brown. 

 8. Whole leaf throughout hairy by short pseudo-slellate 

 hairs, i. e. the hairs are often found in bundles of 

 2—5 originating from the same epidermal cell 



100. D. phacelothrix C. Chr. et Ros. n. sp. 

 8. Leaf with ordinary simple hairs. 



9. Lamina coriaceous. Segments broadly triangular 



101. D. caucaensis (Hieron.) C. Chr. 

 9. Lamina firmly herbaceous. Segments oblong 



102. D. Funckii (Mett.) O. Ktze. 

 7. Scales of rachis very numerous, broad, yellowish, 



glandulose ." 103. I), velala (Kze.) O. Ktze. 



5. Lower pinnæ petiolulate. 



6. Pinnæ entire or subentire, Va — I'/s cm long. Indusium 



persistent, densely setose 54. D. pusilla (Mett.) O. Ktze. 



6. Pinnæ 2 — cm long, deeply lobed or pinnatifid. Indusium 

 absent or minute. 

 7. Pinnæ with a truncate base. Sori oblong-linear 



104. D. aspidioides (Willd.) C. Chr. 

 7. Pinnæ with a cuneate base. Sori oblong-linear or round 



105. I), ptarmica (Kze.) O. Ktze. 

 3. Pinnæ 2—5 cm broad, 10 — 15 cm long, the lower 3—5 pairs as a 

 rule reduced (type III). Most species large. 

 4. Sori all round. 



5. Rachis without scales. Segments rarely 5 mm broad. 



6. Leaf-tissue glabrous, at least not densely pubescent by 

 adpressed hairs. 

 7. Lamina papyraceous or membranous. 



8. Pinnæ pinnatifid only; most segments entire. 

 9. Rachis glabrous beneath or deciduously hairy. 

 10. Lamina beneath with large, red glands. Sori 

 medial, indusium large, glandulose. 



106. Ü. pachyrachis (Kze.) O. Ktze. 



