122 70 
10. Lamina eglandulose. 
11. Coste beneath without scales. 
12. Indusium very large, persistent; sori 
medial . - 106. D. pachyrachis (Kze.) O. Ktze. 
12. Indusium small or none. 
13. Sori medial, exindusiate 146. D. Bradei Christ. 
18. Sori supramedial or submarginal. 
14. Indusium present; pinnz about 
1'/» em broad; veins above spar- 
sely setose 110. D. Hieronymusii C. Chr. 
14. Indusium none; pinne 2 cm 
broad; veins above glabrous 
111. D. roraimensis (Bak.) C. Chr. 
11. Costze beneath with scattered, brown scales. 
12. Segments with open spaces between; 
indusium very large, persistent, glan- 
dular 106. D. pachyrachis var. Sprucei (Bak.) C. Chr. 
12. Segments close, acute; indusium smal- 
lemanoteclandular 55 113. D. illicita Christ. 
9. Rachis rather pubescent. Underside eglandulose. 
10. Sori medial. Lamina papyraceous or subcoria- 
ceous. 
11. Segments 2 mm broad, falcate-ligulate 
112. D. utanagensis Hieron. 
11. Segments 3—4 mm broad, patent. 
12. Basal segments parallel to rachis 
106. D. pachyrachis (Kze.) O. Ktze. 
12. Basal segments (of larger pinnz) over- 
lapping the rachis or with interne 
auricles. 
13. Rachis short-hairy; coste beneath 
without scales; indusium persistent 
107. D. supina (Sod.) C. Chr. 
13. Rachis long-hairy; coste beneath 
somewhat scaly; indusium none 
170. D. multiformis n. sp. 
10. Sori near the margin. Lamina firmly mem- 
branous. 
11. Lamina gradually narrowed downwards 
with 2—3 pairs of auriculiform  pinnze. 
Veins 8—9-jugate 120. D. demerarana (Bak.) C. Chr. 
11. Lamina abruptly attenuate with several 
pairs of glanduliform pinnas. Veins 10—14- 
jugate s.0..--.......... 148: Db) Christensenti Choisie 
8. Pinnz with the lower segments free; segments crenate 
114. D. atropurpurea Hieron. 
7. Lamina thinly herbaceous. 
8. Coste beneath glabrous or sparsely pubescent by uni- 
cellular hairs, without scales. 
9. Sori medial. Rachis glabrous or nearly so; under 
surface generally glandulose. 
‘10. Indusium glabrous, glandulose. 
11. Jamaica... 106. D. pachyrachis var. Jenmani (Bak.) 
