63 115 
Key. 
1. Tertiary veins 1—10-jugate. Lamina towards the base gradually, rarely 
abruptly attenuate, or, in some few species, not at all narrowed down- 
wards. 
2. Rhizome erect or decumbent with the stipites fasciculated. Veins 
nearly always simple. 
3. Pinne rarely more than 1'/» cm broad, 10 cm long. 
4. Lamina towards the base very gradually narrowed; reduced 
pinnze numerous, stipe very short (type II). Basal segments, 
especially the upper one, generally longer and often broader 
than the others. Most species small. 
5. Pinnz entire or subentire, !/»—1!/» cm long. 
6. Pinnz shortstalked, about 1 cm long; rachis without 
SCaleStz e caseo pre dete eerte 54. D. pusilla (Mett.) O. Ktze. 
6. Pinnz sessile, 1!/s em long; rachis scaly 
55. D. brachypoda (Bak.) C. Chr. 
5. Pinnz deeply lobed, or, as a rule, pinnatifid. 
6. Rachis scaly. 
7. Pinne scarcely 2 cm long, auricled on both sides of 
the base, subentire or subpinnatifid; stipe nearly none 
55. D. brachypoda (Bak.) C. Chr. 
7. Pinnz 3—4 em long, regularly pinnatifid; stipe 3—4 cm 
lOHgix eredi if aset 102. D. Funckii (Mett.) O. Ktze. 
6. Rachis without scales. 
7. Veins not prominent above; lamina herbaceous or 
thinly membranous. 
8. Pinnz unequal-sided, the anterior (upper) side 
being broader than the posterior one. 
9. Rhizome small, erect. Pinnz pinnatifid, generally 
glandulose beneath. 
10. Indusium absent or minute. 56. D. sancta (L.) O. Ktze. 
10. Indusium large, persistent. 
11. Lamina herbaceous; sori about medial; 
reduced pinne few....... 57. D. sanctiformis n. sp. 
11. Lamina membranous to coriaceous; sori 
close to the margin 59. D. consanguinea (Fée) C. Chr. 
9. Stem epigzeous, very long and scaly; pinna with 
a straight, cuneate, entire base on the lower side, 
not deeply cut, eglandulose 58. D. longicaulis (Bak.) C. Chr. 
8. Pinnz equal-sided, but sometimes auricled at the 
upper base only. 
9. Leaf thinly herbaceous. Small species with pinnz 
2—3 cm long; veins 2—3-jugate. 
10. Segments entire, the margins not revolute. 
11. Sori supramedial; lamina scarcely 30 cm 
longos ye s 60. D. delicatula (Fée) C. Chr. 
11. Sori medial; lamina up to 50 em long 
61. D. pseudosancta C. Chr. 
10. Segments crenate with revolute margins 
62. D. physematioides (Kuhn et Christ) C. Chr. 
9. Leaf firmly herbaceous or membranous. Most 
species larger with pinnz 3—10 cm. long. 
